WO2005052087A1 - 蛍光体と蛍光体を用いた発光器具 - Google Patents
蛍光体と蛍光体を用いた発光器具 Download PDFInfo
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- WO2005052087A1 WO2005052087A1 PCT/JP2004/017895 JP2004017895W WO2005052087A1 WO 2005052087 A1 WO2005052087 A1 WO 2005052087A1 JP 2004017895 W JP2004017895 W JP 2004017895W WO 2005052087 A1 WO2005052087 A1 WO 2005052087A1
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 291
- 239000013078 crystal Substances 0.000 claims abstract description 150
- 150000002484 inorganic compounds Chemical class 0.000 claims abstract description 70
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 70
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 14
- 239000006104 solid solution Substances 0.000 claims abstract description 13
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 11
- 229910052691 Erbium Inorganic materials 0.000 claims abstract description 11
- 229910052769 Ytterbium Inorganic materials 0.000 claims abstract description 11
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 10
- 229910052775 Thulium Inorganic materials 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 9
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 8
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 8
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 8
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 7
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 6
- 229910052765 Lutetium Inorganic materials 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 103
- 239000000203 mixture Substances 0.000 claims description 97
- 239000000843 powder Substances 0.000 claims description 90
- 230000005284 excitation Effects 0.000 claims description 64
- 229910052757 nitrogen Inorganic materials 0.000 claims description 49
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- 125000004429 atom Chemical group 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 21
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- 229910052718 tin Inorganic materials 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052738 indium Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 8
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 7
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- 238000010894 electron beam technology Methods 0.000 claims description 6
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- 229910052796 boron Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
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- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 claims description 2
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- 239000012071 phase Substances 0.000 description 103
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- 239000001301 oxygen Substances 0.000 description 98
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 76
- 239000002994 raw material Substances 0.000 description 74
- 238000000034 method Methods 0.000 description 37
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- 229910052791 calcium Inorganic materials 0.000 description 14
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 13
- 230000007423 decrease Effects 0.000 description 12
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 10
- 238000013461 design Methods 0.000 description 10
- 229910052712 strontium Inorganic materials 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
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- 229910052582 BN Inorganic materials 0.000 description 6
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 6
- 238000007792 addition Methods 0.000 description 6
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- 229910052717 sulfur Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- PSBUJOCDKOWAGJ-UHFFFAOYSA-N azanylidyneeuropium Chemical compound [Eu]#N PSBUJOCDKOWAGJ-UHFFFAOYSA-N 0.000 description 5
- 229910052788 barium Inorganic materials 0.000 description 5
- 239000002775 capsule Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 229910052710 silicon Inorganic materials 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000003991 Rietveld refinement Methods 0.000 description 4
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 4
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
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- 230000008569 process Effects 0.000 description 4
- 238000003746 solid phase reaction Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 101001012040 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Immunomodulating metalloprotease Proteins 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910001940 europium oxide Inorganic materials 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
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- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
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- 238000001683 neutron diffraction Methods 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 150000003891 oxalate salts Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VWVRASTUFJRTHW-UHFFFAOYSA-N 2-[3-(azetidin-3-yloxy)-4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]pyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound O=C(CN1C=C(C(OC2CNC2)=N1)C1=CN=C(NC2CC3=C(C2)C=CC=C3)N=C1)N1CCC2=C(C1)N=NN2 VWVRASTUFJRTHW-UHFFFAOYSA-N 0.000 description 1
- 101100042630 Caenorhabditis elegans sin-3 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 208000006558 Dental Calculus Diseases 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 229910016655 EuF 3 Inorganic materials 0.000 description 1
- 208000016169 Fish-eye disease Diseases 0.000 description 1
- 241000254158 Lampyridae Species 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- FCVHBUFELUXTLR-UHFFFAOYSA-N [Li].[AlH3] Chemical class [Li].[AlH3] FCVHBUFELUXTLR-UHFFFAOYSA-N 0.000 description 1
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- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
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- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
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- 238000000227 grinding Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000005121 nitriding Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- IBIRZFNPWYRWOG-UHFFFAOYSA-N phosphane;phosphoric acid Chemical compound P.OP(O)(O)=O IBIRZFNPWYRWOG-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
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- 230000000171 quenching effect Effects 0.000 description 1
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- 239000011819 refractory material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000000547 structure data Methods 0.000 description 1
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- 150000003568 thioethers Chemical class 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/77928—Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/0602—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with two or more other elements chosen from metals, silicon or boron
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/0821—Oxynitrides of metals, boron or silicon
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/447—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on phosphates, e.g. hydroxyapatite
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/581—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on aluminium nitride
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/597—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to a phosphor mainly composed of an inorganic compound and its use. More specifically, the use is made of a luminaire, a light-emitting device such as an image display device, and a pigment, which use the property of the phosphor, that is, the property of emitting long-wavelength fluorescence of 570 nm or more.
- Phosphors are used in fluorescent display tubes (VFD), field emission displays (FED), plasma display panels (PDP), cathode ray tubes (CRT), and white light emitting diodes (LED).
- VFD fluorescent display tubes
- FED field emission displays
- PDP plasma display panels
- CRT cathode ray tubes
- LED white light emitting diodes
- the phosphor may be vacuum ultraviolet light, ultraviolet light, electron beam, blue light, or the like. It is excited by a high energy excitation source and emits visible light.
- the phosphor is exposed to the above-mentioned excitation source, there is a problem that the luminance of the phosphor is reduced, and there is a demand for a phosphor that does not decrease in luminance.
- Sialon phosphors have been proposed as phosphors with little reduction in luminance, replacing conventional phosphors such as silicate phosphor, phosphate phosphor, aluminate phosphor, and sulfide phosphor.
- This Sialon phosphor is manufactured by a manufacturing process as generally described below. First, nitride Kei element (S i 3 N 4), aluminum nitride (A 1 N), carbonate Cal Shiumu (C a C_ ⁇ 3), europium oxide (E u 2 0 3), mixed in a predetermined molar ratio It is manufactured by firing in a nitrogen atmosphere at 1 atm (0. IMPa) at a temperature of 17 ° C.
- the resulting Eu-activated a-sialon can be a phosphor that emits yellow light of 550 to 600 nm when excited by blue light of 450 to 500 nm. It has been reported. However, phosphors that emit not only yellow light but also orange or red light were required for applications such as white LEDs and plasma displays using ultraviolet LEDs as excitation sources. In white LEDs using a blue LED as an excitation source, a phosphor that emits orange or red light has been required to improve color rendering.
- Chapter 2 of the publication “ ⁇ nnewrare—earthdoped M—3 ⁇ 4 ⁇ —A 1—O—N materia 1 s” (see Non-Patent Document 2) describes the ternary composition of anolecali metal and silicon of various compositions.
- Patent Document 3 discloses MS i 3 N 5 , M 2 S i 4 N 7 , M 4 S i 6 ⁇ M 9 S i iiN 23 , M 16 S i 15 ⁇ 6 N 32 , M 13 S i 18 A l 12 0 18 N 36 , MS i 5 A 1 2 ON 9 , M 3 S i 5 A 1 ON 10 (
- M is Ba, C a, S r, or a rare-earth element
- a phosphor in which Eu or C e is activated is known.
- Luminescent phosphors have also been reported. Also, an LED lighting unit using these phosphors is known. Further, JP 2002- 3 2247 to 4 (Patent Document 4), S r 2 S i 5 N 8 and S r S i. Phosphors in which Ce is activated in the crystal phase have been reported.
- JP 2003-321675 states that L x My N (2/3 x + 4/3 y ): Z (has divalent elements such as &&, Sr, Ba , and M A tetravalent element such as Si and Ge, and Z is an activator such as Eu.)
- Z has divalent elements such as &&, Sr, Ba , and M A tetravalent element such as Si and Ge, and Z is an activator such as Eu.
- a phosphor There is a description of a phosphor, and it is described that adding a small amount of A1 has an effect of suppressing afterglow. Also, a slightly reddish warm white light emitting device is known by combining this phosphor with a blue LED. Further, Japanese Patent Application Laid-Open No.
- Patent Document 6 discloses L xMy N ( 2 / 3 x + 4/3 y): Phosphors composed of various L, M and Z elements have been reported as Z phosphors.
- Patent Document 7 describes a wide range of combinations of L-M-N: Eu and Z-systems, but improves the emission characteristics when a specific composition or crystal phase is used as a matrix. The effect of is not shown.
- Patent Documents 2 to 7 have a base crystal of a nitride of a divalent element and a tetravalent element, and phosphors having a host of various different crystal phases have been reported. It is also known that the red light is emitted, but the excitation with blue visible light did not provide sufficient red light emission luminance. In addition, depending on the composition, the chemical instability was unstable, and there was a problem in durability.
- Non-Patent Document 1 H.A.Hoppe et al. And 4 others "JournalofPhysiccsanddChemisstrryofao1ids 2000, 61, 2001, 2006-2006
- Non-Patent Document 2 "On new w e r e-e a r t h d o e d M-S i-A 1-O-N ma t e r i a l s" J. W. H. v a n K r e v e l, TU E in d h o v e n 2000, I SBN 90-386-27 1 114
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-363654.
- Patent Document 2 U.S. Pat.No. 6,662,663
- Patent Document 3 Japanese Patent Laid-Open Publication No. 2003-206481
- Patent Document 4 Japanese Patent Application Laid-Open No. 2002-322474
- Patent Document 5 Japanese Patent Application Laid-Open No. 2003-321675
- Patent Document 7 Japanese Patent Publication No. 2004-107686 A white light-emitting diode using a combination of a blue light-emitting diode element and a blue absorbing yellow light-emitting phosphor is known as a conventional lighting device. It has been put to practical use.
- Japanese Patent No. 2900928 "Light emitting diode J"
- Patent Document 9 Patent No. 2927279
- Patent Document 10 "Wavelength conversion casting material and its manufacturing method and light emitting element” Is done.
- phosphor used particularly well the general formula (Y, G d) a ( A 1, G a) 5 0 12: represented by C e 3 +, and activated with Seriumu Ittoriumu 'Aluminum garnet phosphor.
- a white light-emitting diode composed of a blue light-emitting diode element and an yttrium-aluminum-garnet-based phosphor has a feature that it emits pale light due to a lack of a red component, and there is a problem that color rendering properties are biased.
- a white light-emitting diode has been studied in which two kinds of phosphors are mixed and dispersed to compensate for the red component deficient in the yttrium, aluminum, and garnet phosphors with another red phosphor.
- Examples of such a light emitting diode include a white light emitting device disclosed in Japanese Patent Application Laid-Open No. 10-163535 (Patent Document 11) and Japanese Patent Application Laid-Open No. 2003-321675 (Patent Document 5) Method ”and the like.
- Patent Document 11 Japanese Patent Application Laid-Open No. 10-163535
- Patent Document 5 Japanese Patent Application Laid-Open No. 2003-321675
- Patent Document 11 contains a power dome, and has a problem of environmental pollution.
- Patent Document 5 describes a red light-emitting fluorescent light represented by Ca 97 Si 5 N 8 : Eu 0.03 which does not contain a power dome, but is a phosphor. Because of the low brightness, further improvement in emission intensity was desired.
- Patent Document 8 Japanese Patent No. 2900928
- Patent Document 9 Patent No. 29 27279
- Patent Document 10 Patent No. 3 364 22 9
- Patent Literature 11 Japanese Patent Application Laid-Open No. 10-16-3535
- One object of the present invention is to meet such a demand.
- One of the objects is to emit orange or red light of a longer wavelength than conventional rare earth activated phosphors and to have a higher degree of light.
- An object of the present invention is to provide a chemically stable inorganic phosphor. It is still another object of the present invention to provide a lighting device having excellent color rendering properties, an image display device having excellent durability, a pigment, and an ultraviolet absorber using the phosphor.
- the M element that becomes a luminescent ion (where M is Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu force, etc.
- M is Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu force, etc.
- divalent A element (where A is one or more elements selected from Mg, Ca, Sr, Ba) and tetravalent D elements (except, D is S i, G e, S n s T i, Z r, 1 or two or more elements selected from H f) and, trivalent E element (however, E of B, Al, Ga, In, Sc, Y, La force, one or more elements selected from), and X element (where X is 0, N, F
- those with a specific composition range and a specific crystal phase are 57 On orange or more wavelengths or more than 600 nm Found that a
- an optically active element M, especially Eu is added as a luminescence center.
- the present invention is the Mi 3 S i 18 A l 12 ⁇ 18 N 36, MS i 5 A l 2 ON 9, M 3 S i 5 A 1 ON 10 (M being previously reported in Patent Document 3 C a, B a, S r, etc.) and, CHAPTER C a 47 E uo listed in the non-patent document 2, different Ku stylized and sialon such as eg S i 9 a 1 3 N i 6
- the trivalent element represented by A1 is defined as the main constituent element of the base crystal and the crystal phase is referred to as the base. Phosphor.
- a phosphor in which Mn or a rare earth element is activated as an emission center element M in an inorganic host crystal changes its emission color and luminance depending on the electronic state around the M element. For example, it has been reported that blue, green, yellow, and red light is emitted from a phosphor whose emission center is divalent Eu by changing the parent crystal. In other words, even if the composition is similar, if the atomic structure in the parent structure or the crystal structure in which M is incorporated is changed, the emission color and brightness will be quite different, and they are regarded as different phosphors.
- the base crystal is a divalent, trivalent, or tetravalent multi-nitride, which is different from the conventional ternary nitrides of divalent and tetravalent elements.
- the base material is a crystal phase having a different structure, and there has been no report on a phosphor using such a crystal phase as a base material.
- the phosphor of the present invention having a composition and a crystal structure as a matrix emits red light having higher luminance than a phosphor having a conventional crystal structure as a matrix.
- Non-Patent Document 3 Z HE N-KUN- HUANG and 2 others "Journa 1 of Material Sciences Letters. 1 985, 4 tickets, 2555-259 pages
- This C a A 1 S i N 3 crystal phase itself is based on the fact that it was confirmed in the research process of Sialon as described above. There is no mention of dissolving an optically active element in the present crystal phase and using the solid solution crystal phase as a phosphor. Until the present invention, no attempt was made to use this as a phosphor. In other words, a novel substance in which an optically active element is dissolved in the C a A 1 S i N 3 crystal phase is a novel substance.
- the present inventors have conducted further intensive studies on the basis of this finding, and as a result, by employing the configurations described in the following (1) to (24), a light emission phenomenon of high luminance in a specific wavelength region is exhibited.
- this phosphor and adopting the configuration described in (25) to (37), a lighting device and an image display device having excellent characteristics have been successfully provided.
- the inorganic compound as a phosphor as described in (38) to (39) a pigment and an ultraviolet absorber were successfully provided.
- the present invention provides a phosphor that emits light with high luminance in a long shadow area, and an illuminating device, an image display device, a pigment, and an ultraviolet ray using the phosphor. It succeeded in providing an absorbent, and the composition is as described in the following (1) to (39).
- a yarn composition containing at least M element, A element, D element, E element, and X element (where M is Mn, Ce, Pr, Nd, S m, Eu, Tb, Dy, Ho, Er, Tm, and one or more elements selected from the group consisting of Yb, A is a divalent metal element other than the M element
- X is one or more elements selected from ⁇ , N, and F
- the phosphor according to the above item (1) characterized by being composed of an inorganic compound having the same crystal structure as that of C a A 1 S i N 3 .
- A is one or more elements selected from the group consisting of Mg, Ca,. Sr, and Ba; D is Si, Ge, Sn, Ti, Zr , Hf, one or more elements selected from the group consisting of: E, E is selected from the group consisting of B, Al, Ga, In, Sc, Y, La, Gd, Lu
- the phosphor according to any one of (1) to (6).
- Element M is Eu
- element A is Ca
- element D is Si
- element E is A1
- element X is N or a mixture of N and ⁇ . Characterized by the above
- An inorganic compound having the same crystal structure as Ca A 1 S i N 3 is a C a Al S i N 3 crystal phase, in which Eu is dissolved as a solid solution, and 10 0
- the phosphor according to the above item (20) which emits fluorescence having a wavelength of 600 nm to 700 nm when irradiated with light having a wavelength of 11111 to 600 nm.
- the color emitted when the excitation source is irradiated is the value of (x, y) on the CIE chromaticity coordinates, and 0.45 ⁇ ⁇ 0.7
- a lighting device comprising a light emitting light source and a phosphor, wherein at least the phosphor according to any one of the above items (1) to (24) is used.
- the lighting device according to the above item (25), wherein the light source is an LED that emits light having a wavelength of 330 to 500 nm.
- the light emitting source is an LED that emits light having a wavelength of 330 to 420 nm, and the phosphor according to any one of the above items (1) to (24); Blue phosphor having an emission peak at a wavelength of 420 nm or more and 500 nm or less by excitation light of nm, and green phosphor having an emission peak at a wavelength of 500 nm or more and 570 nm or less by excitation light of 330-420 nm.
- the lighting device according to any one of the above (25) or (.26), wherein white light is emitted by mixing red, green, and blue light by using the light emitting device.
- the light-emitting source is an LED that emits light having a wavelength of 420 to 500 nm, and the phosphor according to any one of the above (1) to (24), and excitation of 420 to 500 nm.
- the white light is emitted by using a green phosphor having an emission peak at a wavelength of 500 nm or more and 570 nm or less by light, according to any one of the above items (25) and (26).
- the lighting fixture as described.
- the light emitting source is an LED that emits light having a wavelength of 420 to 50011 m, and the phosphor according to any one of the above (1) to (24), and excitation of 420 to 500 nm. Any of the above (2,5) or (26), which emits white light by using a yellow phosphor having an emission peak at a wavelength of 550 nm or more and 600 nm or less by light. Lighting equipment according to paragraph 1.
- An image display device comprising an excitation source and a phosphor, wherein at least the phosphor according to any one of the above (1) 'to (24) is used. . (32) The image display device according to (31), wherein the excitation source is an LED that emits light having a wavelength of 330 to 500 nm.
- the excitation source is an LED that emits light having a wavelength of 330 to 420 nm, and 330 to 420 ⁇ m.
- the excitation source is an LED that emits light having a wavelength of 330 to 420 nm, and 330 to 420 ⁇ m.
- the image display device according to any one of the above (31) or (32), wherein white light is emitted by mixing red, green, and blue light.
- the excitation source is an LED that emits light having a wavelength of 420 to 50011 m, and the phosphor according to any one of the above items (1) to (24), and excitation of 420 to 500 ⁇ m. Any one of the above item (31) or (32), wherein the device emits white light by using a green phosphor having an emission peak at a wavelength of 500 nm or more and 570 nm or less by light. 3.
- the image display device according to 1. ⁇
- the excitation source is an LED that emits light having a wavelength of 420 to 500 nnx, and the phosphor according to any one of the above items (1) to (24), and excitation of 420 to 500 ⁇ in. Any one of the above item (31) or (32), which emits white light by using a yellow phosphor having an emission peak at a wavelength of 550 nm to 600 nm by light. 3.
- the image display device according to 1.
- the image display device is a fluorescent display tube (VFD), fino red emission display (FED), plasma display panel (PDP), cathode ray tube (CRT)
- VFD fluorescent display tube
- FED fino red emission display
- PDP plasma display panel
- CRT cathode ray tube
- the phosphor of the present invention is a multi-element nitride containing a divalent element, a trivalent element and a tetravalent element, in particular, a crystal phase represented by C a A 1 S i N 3 , and another crystal phase having the same crystal structure.
- a crystal phase or a solid solution of these crystal phases By containing a crystal phase or a solid solution of these crystal phases as a main component, it emits light at a longer wavelength than the conventional SiN oxynitride phosphor, and as an orange or red phosphor Are better.
- this phosphor Even when exposed to an excitation source, this phosphor provides a useful phosphor suitable for use in VFDs, FEDs, PDPs, CRTs, white LEDs, etc., without a decrease in luminance. Also, among these phosphors, certain inorganic compounds have a red base color and absorb ultraviolet light, and thus are suitable for red pigments and ultraviolet absorbers. ⁇
- FIG. 1-1 is an X-ray diffraction chart of Ca A 1 S i N 3 .
- FIG. 1-2 is an X-ray diffraction chart of Ca A 1 Si N 3 (Example 1) activated by Eu.
- FIG. 2 is a diagram showing a crystal structure model of Ca A 1 S i N 3 .
- FIG. 3 is a diagram showing a crystal structure model of Si 2 N 20 having a similar structure of the Ca A 1 Si N 3 crystal phase.
- FIG. 4 is a diagram showing a light emission spectrum of the phosphor (Examples 1 to 7).
- FIG. 5 is a diagram showing an excitation spectrum of the phosphor (Examples 1 to 7).
- FIG. 6 is a diagram showing a light emission spectrum of a phosphor (Examples 8 to 11).
- FIG. 7 is a diagram showing an excitation spectrum of a phosphor (Examples 8 to 11).
- FIG. 8 is a diagram showing a light emission spectrum of a phosphor (Examples 12 to 15).
- FIG. 9 is a diagram showing an excitation spectrum of a phosphor (Examples 12 to 15).
- FIG. 10 is a diagram showing the light emission spectrum of the phosphor (Examples 16 to 25).
- FIG. 11 is a diagram showing an excitation spectrum of the phosphor (Examples 16 to 25).
- FIG. 12 is a diagram showing a light emission spectrum of a phosphor (Examples 26 to 30).
- FIG. 13 is a diagram showing an excitation spectrum of a phosphor (Examples 26 to 30).
- FIG. 14 is a schematic diagram of a lighting fixture (LED lighting fixture) according to the present invention.
- FIG. 15 is a schematic diagram of an image display device (plasma display panel) according to the present invention.
- 1 is a mixture of a red phosphor and a yellow phosphor of the present invention or a mixture of a red phosphor, a blue phosphor and a green phosphor of the present invention
- 2 is an LED chip
- 3 And 4 are conductive terminals
- 5 is a wire bond
- 6 is a resin layer
- 7 is a container
- 8 is a red phosphor of the present invention
- 9 is a green phosphor
- 10 is a blue phosphor
- 11, 12, and 13 Represents an ultraviolet light emitting cell
- 14, 15, 16 and 17 represent electrodes
- 18 and 19 represent dielectric layers
- 20 represents a protective layer
- 21 and 22 represent glass substrates.
- the phosphor of the present invention comprises (1) a composition containing at least M element, A element, D element, E element, and X element (where M is Mn, Ce, Pr, Nd , Sm, EuTb, Dy, Ho, Er, Tm, Yb, one or more elements selected from the group consisting of, A is a group consisting of-divalent metal elements other than M element
- M is Mn, Ce, Pr, Nd , Sm, EuTb, Dy, Ho, Er, Tm, Yb
- A is a group consisting of-divalent metal elements other than M element
- D is one or more elements selected from the group consisting of tetravalent metal elements
- E is selected from the group consisting of trivalent metal elements
- X is one or more elements selected from the group consisting of 0, N, and F;
- (2) (a) a crystal phase represented by the chemical formula C a A 1 S i N 3 , (b) another crystal phase having the same crystal structure as this crystal phase,
- M is a force S which is one or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb.
- Mn, Ce, Sm, Eu, Tb, Dy, Er and preferably one or more elements selected from the group consisting of Yb, more preferably containing Eu
- it is more preferably Eu.
- A is one or more elements selected from the group consisting of divalent metal elements other than the M element, and among them, is selected from the group consisting of Mg, Ca, Sr, and Ba. It is preferably a species or two or more elements, and more preferably Ca.
- D is one or more elements selected from the group consisting of tetravalent metal elements. Among them, D is a group consisting of Si, Ge, Sn, Ti, Zr, and Hf. It is preferably one or two or more selected elements, and more preferably Si.
- E is one or more elements selected from the group consisting of trivalent metal elements.
- B Al, Ga, In, Sc, Y, La, G It is preferably one or two or more elements selected from the group consisting of d and Lu, and more preferably A1.
- X is one or more elements selected from the group consisting of 0, N, and F, and among them, N or N and O are preferable.
- the composition is represented by the composition formula 1 ⁇ 3 1] 0 ( : £ ( 16.
- a, c, d, e :
- the value of a is preferably 0.002 or more and 0.03 or less from the viewpoint of increasing the emission luminance.
- the c value is the content of the D element such as Si, and is the amount indicated by 0. c ⁇ 4.
- the c-value is smaller than 0.5 and larger than 4, the light emission luminance decreases.
- the e value is the content of X element such as .N,
- those having a high emission luminance include at least Eu in the M element, Ca in the A element, Si in the D element, A 1 in the E element, X element Contains N.
- M element is Eu
- a element is Ca
- D element is
- Si is an element
- E is an element A1
- element X is an inorganic compound such as N or a mixture of N and O.
- the crystal phase belongs to the 36th space group of the Cmc Z i International Tables for Crysta 1 lography). It occupies the attrition coordinate position shown in Table 5.
- the space group was determined by convergent electron diffraction, and the atomic coordinates were determined by Rietveld analysis of the X-ray diffraction results.
- This crystal phase has the structure shown in Fig. 2 and has a skeleton similar to the Si 2 N 20 crystal phase (mineral name sincite) shown in Figs. That is, Si and A 1 occupy the position of Si in the Si 2 N 20 crystal phase, N occupies the position of N and O, and the space of the skeleton formed by 31-1 ⁇ -0 is C a is a crystal phase incorporated as an interstitial element, and has a structure in which the atomic coordinates have changed to the positions shown in Table 5 due to the element substitution. Note that Si and A 1 occupy the Si position of the Si 2 N 20 crystal phase in an irregularly distributed (disordered) state. Therefore, this structure is named sinoite-type sialon structure.
- Inorganic compounds having a C a A l S i N 3 same crystal structure illustrated in the present invention is that the C a A 1 S i N 3 group crystal phase in which an inorganic compound described above.
- Inorganic compounds having a C aA l S i N 3 and same crystal structure, and C a A l to S i N 3 of substance C other showing the same diffraction and X-ray diffraction results, constituent elements of the other elements This also includes those whose lattice constants have been changed by replacement. For example, C a A 1 S i N 3 crystal phase, C a A 1 S i N 3 crystal phase And the like.
- C a in the crystal phase is an element M (where M is Mn, Ce, One or more elements selected from the group consisting of Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb) and / or M element and Ca
- M is Mn, Ce, One or more elements selected from the group consisting of Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb
- Ca A group consisting of divalent metal elements other than Si, preferably one or two or more elements selected from the group consisting of Mg, Sr, and Ba, wherein Si is from a tetravalent metal element other than Si A, preferably one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and H, wherein A1 is a trivalent metal element other than A1 A group, preferably one or more elements selected from the group consisting of B, GasIn, Sc, Y, La, Gd, and Lu, wherein N is selected from the group consisting
- the C a A 1 S i N 3 group crystal phase has a lattice constant due to the replacement of C a, S i, A 1, and N with other elements or the solid solution of metal elements such as Eu.
- the crystal structure, the sites occupied by the atoms, and the atomic positions given by their coordinates do not change much enough to break the chemical bonds between the skeletal atoms.
- A1-N and S1-N calculated from lattice coordinates and atomic coordinates obtained by Rietveld analysis of X-ray and neutron diffraction results in the space group of Cmc2
- the length of the chemical bond (distance between adjacent atoms) is compared with the lattice constant of C a Al S i N 3 shown in Table 5 and the length of the chemical bond calculated from the atomic coordinates.
- the same crystal structure is defined, and it is determined whether or not it is a C a A 1 S i N 3 group crystal phase. This criterion is that when the length of a chemical bond changes rapidly by ⁇ 15%, the chemical bond is broken and another crystal phase is formed. ⁇
- an approximate structure can be defined by using another crystal system such as a monoclinic system or a hexagonal system for the crystal structure of the Ca A 1 S i N 3 crystal phase.
- the expression uses groups and lattice constants, the X-ray diffraction results remain the same, and the identification method and identification results using the same are the same. For this reason, in the present invention, X-ray diffraction analysis is performed using an orthorhombic system. The method of identifying substances based on Table 4 will be specifically described in Example 1 described later, and will be described only here.
- the number of C a and S r atoms contained in the phosphor, that is, the inorganic compound is 0.02 ⁇ (the number of ⁇ & atoms) / ⁇ (the number of A atoms) + (the number of S r atoms
- the phosphor having a composition within this range is a phosphor having a shorter wavelength than that having a Ca A 1 S i N 3 crystal phase as a matrix.
- a material based on an inorganic compound containing nitrogen and oxygen has excellent durability in high-temperature air.
- the number of O and N atoms contained in the inorganic compound is 0.5 ⁇ (number of N atoms) / ⁇ (number of N atoms) + (number of O atoms) ⁇ ⁇ 1 Excellent durability at high temperatures.
- the phosphor made of an inorganic compound having the same crystal structure as C a A 1 S i N 3 of the present invention is used as a powder
- the phosphor is preferred from the viewpoints of dispersibility in resin, fluidity of the powder, and the like.
- the average particle size of the inorganic compound is preferably from 0.1 zm to 20 ⁇ .
- This powder is a single crystal particle or an aggregate of single crystals, but the average particle size is 0.1 l / m or more and 20 ⁇ or less. improves.
- impurities contained in the inorganic compound are as small as possible.
- selection of raw material powders should be performed so that the total of these elements is 500 ppm or less. Control should be performed.
- components serving C a A 1 S i N 3 group crystal phase of nitride comprise as much as possible in high purity, is that you have constructed a single phase if Although it is desirable, it can be composed of a mixture with another crystalline phase or amorphous phase as long as the characteristics are not deteriorated. In this case, it is desirable that the content of the CaA 1 SiN 3 group crystal phase be 20% by mass or more in order to obtain high luminance. More preferably, the brightness is remarkably improved at 50% by mass or more. Range mainly in the present invention, the content of C a A 1 S i N 3 group crystal phase is at least 2 0 mass% or more.
- the proportion of the content of the C a A 1 S i 3 group crystal phase was measured by X-ray diffraction, and the intensities of the strongest peaks of the C a A 1 S i N 3 group crystal phase and the other crystal phases were determined. Can be obtained from the ratio of
- conductivity can be imparted to the phosphor by mixing an inorganic substance having conductivity.
- the conductive inorganic substance include oxides, oxynitrides, or nitrides containing one or more elements selected from Zn, Al, Ga, In, and Sn, or a mixture thereof. And mixtures thereof.
- the phosphor of the present invention can be colored red by a combination of a specific crystal and an activating element, but it is necessary to mix it with other colors such as yellow, green, and blue. Accordingly, inorganic phosphors that emit these colors can be mixed.
- the excitation spectrum and the fluorescence spectrum are different depending on the composition. By appropriately selecting and combining them, it is possible to set the light emitting device to have various light emitting spectra. The mode may be set to a spectrum required based on the application.
- Eu is added to the Ca A 1 Si N 3 crystal phase by 0.000 I (number of atoms of Eu) / ⁇ (number of atoms of Eu) + (number of atoms of Ca) ⁇ ⁇ 0.
- Additions with a composition of 1 result in light having a wavelength in the range of 100 nm to 600 nm, preferably 600 nm, when excited with light in the wavelength range of 200 nm to 600 nm. It shows light emission with a peak in the wavelength range of 700 nm or less and shows excellent light emission characteristics as red fluorescence.
- the phosphor of the present invention obtained as described above is more visible than ordinary oxide phosphors or existing Salone phosphors from electron beams, X-rays, and ultraviolet rays to visible light, that is, 100 It must have a wide excitation range of ultraviolet or visible light with wavelengths between nm and 600 nm, and emit orange or red light with a wavelength of 570 nm or more. It is characterized by (x, y) on the CIE chromaticity coordinates, and emits red light in the range of 0.45 ⁇ x ⁇ 0.7. Due to the above light emission characteristics, it is suitable for lighting equipment, image display devices, pigments, and ultraviolet absorbers. In addition, it has excellent heat resistance because it does not deteriorate even when exposed to high temperatures, and also has excellent long-term stability under an oxidizing atmosphere and a moisture environment.
- a phosphor with high luminance can be manufactured by the following method.
- a raw material mixture that can constitute the composition represented by M, A, D, E, or X by firing which is a mixture of metal compounds, is heated to 1200 ° C or more in an inert atmosphere containing nitrogen. By firing in a temperature range of 2200 ° C or lower, a high-brightness phosphor can be obtained.
- a starting material is a mixture of europium nitride or oxide: powder of europium, calcium nitride, silicon nitride, and aluminum nitride. Good.
- the mixed powder of the above metal compounds is preferably fired while maintaining the volume filling ratio at 40% or less.
- the volume filling ratio can be obtained from (bulk density of the mixed powder) Z (theoretical density of the mixed powder) XI 00 [%].
- a boron nitride sintered body is suitable because of its low reactivity with a metal compound.
- Firing while maintaining the volume filling rate at 40 ° / 0 or less is because if there is free space around the raw material powder, the reaction product, C a A 1 S i N 3 This is because the crystal phase grows in a free space and the contact between the crystal phases is reduced, so that a crystal phase with few surface defects can be synthesized. ⁇
- a phosphor is synthesized by firing the obtained mixture of metal compounds in an inert atmosphere containing nitrogen in a temperature range of 1200 ° C. or more and 220 ° C. or less.
- the furnace used for Takashige is a metal resistance heating resistance heating method or graphite resistance heating method because the firing temperature is high and the firing atmosphere is an inert atmosphere containing nitrogen.
- An electric furnace using carbon is preferred.
- the sintering method that does not apply mechanical pressure from the outside, such as normal pressure sintering method and gas pressure sintering method, This is preferable for baking while maintaining the volume filling ratio at 40% or less.
- the powder agglomerates obtained by calcination are firmly fixed, pulverize them with a mill usually used in factories, such as a ball mill and a jet mill. Grinding is performed until the average particle size becomes 20 m or less. Particularly preferably, the average particle size is from 0.1111 to 5111. If the average particle size exceeds 20 ⁇ , the fluidity of the powder and the dispersibility in the resin become poor, and the light emission intensity becomes uneven depending on the site when forming a light emitting device in combination with a light emitting element. At 0.1 ⁇ or less, the amount of defects on the surface of the phosphor powder increases, and the emission intensity decreases depending on the composition of the phosphor.
- a phosphor mainly composed of an inorganic compound containing nitrogen and oxygen can be produced by the following method.
- oxygen abundance ratio in the raw material oxygen is present in the raw material to be fired so as to be 1% or more and 20% or less.
- the oxygen content ratio in the raw material is the ratio (percentage) of the number of moles of oxygen to the total number of moles of nitrogen and oxygen present in the raw material to be fired during firing, and the nitrogen in the raw material to be fired is derived from the raw material powder.
- Nitrogen on the other hand, oxygen includes not only those previously contained in the raw material powder but also oxygen taken into the object to be fired from the firing atmosphere during firing.
- the oxygen content in the raw material can be determined by measuring the oxygen content using an oxygen nitrogen analyzer. It is preferable that the oxygen content ratio in the raw material is 2% or more and 15% or less.
- the method of mixing the raw material nitride powder with the oxygen-containing compound powder to obtain a raw material to be fired is preferable.
- the method of (1) and the method of (3) are used in combination to obtain the raw material nitride. It is more preferable to use a raw material to be fired containing a desired concentration of oxygen, and to mix and use an oxygen-containing compound powder with the raw nitride powder.
- the oxygen-containing compound powder is selected from substances that become metal oxides when fired. These substances include inorganic salts such as oxides, nitrates, sulfates, and carbonates of the metals constituting the raw material nitrides, organic salts such as oxalates and acetates, and oxygen-containing substances.
- inorganic salts such as oxides, nitrates, sulfates, and carbonates of the metals constituting the raw material nitrides
- organic salts such as oxalates and acetates
- oxygen-containing substances oxygen-containing substances.
- An organic metal compound or the like can be used, but it is preferable to use a metal oxide because the oxygen concentration can be easily controlled and the entrainment of impurity gas into the firing atmosphere can be suppressed low.
- the oxygen content in the raw material can be easily determined by performing a chemical analysis of all the raw materials. In particular, by analyzing the concentration of nitrogen and oxygen, the ratio of nitrogen and oxygen can be determined.
- the simple substance and / or compound of the element M used as the 'raw material' include metals (simple), oxides, nitrides, sulfides, halides, and hydrides of the element M, as well as nitrates, sulfates, and carbonates.
- Inorganic acid salts such as oxalates, acetates, etc., organic metal compounds, etc., as long as the M element is incorporated into the phosphor matrix at high temperature, and there are no restrictions on the type. .
- metals, oxides, nitrides, and halides of element M are preferable because of their good reactivity with other nitride raw materials.Particularly, the raw materials can be obtained at low cost and the synthesis temperature of the phosphor can be lowered. And oxides are preferred.
- E u as the element M, as Eu raw material, Eu metal the Eu and configuration elements, E u O and E u 2 0 3, etc.
- various compounds or 2 can be used over seeds, E u F 2, E u F 3, E u halides such as E u C 1 2, E u C 1 3 is preferred because the effect of promoting crystal growth.
- Eu 2 0 3 and Eu metal also highly characteristic phosphor can be synthesized.
- E u 2 0 3 which less cheap deliquescent material cost of the phosphor with high brightness can be synthesized at a relatively low temperature is particularly preferred.
- nitrides As a raw material for elements other than the M element, that is, as a raw material for the A, D, and E elements, those nitrides are usually used.
- the nitride for the A element for example, Mg 3 N 2 , C a 3 n 2, S r 3 n 2, B a 3 n 2, Z n 3 1 , two or more n 2 and the like
- the nitride of D element for example, S i 3 n 4, G e 3 n 4, S n 3 n 4, T i 3 n 4, Z r 3 n 4, H f 3 1 kind of n 4 or the like or two or more.
- the nitride of E element eg 'If it is, one or more of A 1 N, G a N, In N, S C N, etc. may be mentioned, and it is preferable to use those powders because a phosphor having high emission characteristics can be produced.
- the use of a highly reactive and highly reactive nitride raw material in which the number of moles of oxygen to the total number of moles of nitrogen and oxygen is 1% or more and 20% or less as the raw material of element A The solid-phase reaction can proceed remarkably, and as a result, the firing temperature and the atmospheric gas pressure during firing can be reduced without compression molding the raw material mixed powder.
- a nitride raw material in which the number of moles of oxygen relative to the total number of nitrogen and oxygen is particularly 2 ° / 0 or more and 15% or less.
- the bulk density of the raw material mixed powder is too low, the solid phase reaction does not easily proceed due to the small contact area between the raw material powders, and a large amount of impurity phase that cannot synthesize a preferable phosphor remains.
- the bulk density is too large, the obtained phosphor may be a hard sintered body, which requires not only a long pulverization step after firing but also a decrease in the luminance of the phosphor. is there. Therefore, the bulk density is preferably 0.15 gZcm 3 or more and 0.8 g / cm 3 or less.
- the firing temperature of the raw material mixed powder is too low, the solid phase reaction does not easily proceed, and the desired phosphor cannot be synthesized. On the other hand, if it is too high, it only consumes unnecessary firing energy Instead, the volatilization of nitrogen from the starting materials and product materials increases, and the target phosphor tends to be manufactured unless the pressure of nitrogen, which is a part of the atmospheric gas, is extremely high. Therefore, the firing temperature is preferably from 1300 ° C to 1700 ° C.
- the sintering atmosphere of the raw material mixed powder is basically an inert atmosphere or a reducing atmosphere.However, by using an atmosphere containing a trace amount of oxygen having an oxygen concentration in the range of 0.1 to 10 ppm, it can be performed at a relatively low temperature. It is preferable since the phosphor can be synthesized.
- the pressure of the atmosphere gas during firing is usually 20 atm (2 MPa) or less.
- high-temperature sintering equipment consisting of a robust heat-resistant vessel is required.
- the atmospheric gas pressure it is necessary to reduce the atmospheric gas pressure to 10 atmospheres (1 MPa) or less. I like it.
- the pressure slightly exceeds 1 atm (0. IMPa). If the airtightness of the firing furnace is poor, it is difficult to obtain a phosphor with high characteristics due to the incorporation of a large amount of oxygen below 1 atm (0. IMPa). ''.
- the holding time at the maximum temperature during firing is usually 1 minute or more and 100 hours or less. If the holding time is too short, the desired phosphor cannot be obtained without the solid phase reaction between the raw material mixed powders proceeding sufficiently. On the other hand, if the holding time is too long, not only unnecessary heating energy is consumed, but also nitrogen is desorbed from the surface of the phosphor, thereby deteriorating the fluorescence characteristics. For the same reason, it is preferable that the holding time is not less than 10 minutes and not more than 24 hours.
- the Ca A 1 SiN 3 group crystal phase phosphor of the present invention exhibits higher luminance than a conventional Sallon phosphor, and exhibits a higher luminance when exposed to an excitation source. Since it is less deteriorated, it is a suitable phosphor for VFD, FED, PDP, CRT, white LED, etc.
- the lighting fixture of the present invention is configured using at least a light emitting light source and the phosphor of the present invention.
- Lighting equipment includes LED lighting equipment and fluorescent lamps.
- the phosphor of the present invention is used to obtain a known device as described in JP-A-5-152609, JP-A-7-99345, JP-A-2927279, and the like. It can be manufactured by a method.
- the light source is 3 30-500 n
- These light-emitting elements include those made of nitride semiconductors such as GaN and InGaN, and can be a light-emitting light source that emits light of a predetermined wavelength by adjusting the composition.
- a lighting device that emits a desired color can be formed by using the phosphor of the present invention in combination with a phosphor having another light emitting characteristic.
- a phosphor having another light emitting characteristic As an example of this, an ultraviolet LED emitting element of 330 to 420 nm, a blue phosphor excited at this wavelength and having an emission peak at a wavelength of not less than 420 rim and not more than 500 nm, and 500 nm
- a green phosphor having an emission peak at a wavelength of not less than nm and not more than 570 nm There is a combination of a green phosphor having an emission peak at a wavelength of not less than nm and not more than 570 nm and the phosphor of the present invention.
- Such blue phosphor as the B AMG A 1 10 ⁇ 17: the E u, 8 & 1 ⁇ 1 ⁇ 1 1 as a green phosphor. 0 17 : £ 11, Mn.
- the ultraviolet light emitted by the LED is irradiated on the phosphor, light of three colors, red, green, and blue, is emitted, and a white luminaire is obtained by mixing these lights.
- a blue LED light emitting device of 420 to 500 nm, a yellow phosphor excited at this wavelength and having an emission peak at a wavelength of 550 nm to 600 nm, and the phosphor of the present invention are used. There is a combination with.
- a blue LED light emitting element of 420 to 500, a green phosphor excited at this wavelength and having an emission peak at a wavelength of 5001 to 570 nm, and a fluorescent light of the present invention are used.
- the blue light emitted by the LED When the phosphor is irradiated on the phosphor, two colors of red and green light are emitted, and these are mixed with the blue light of the LED itself to form a white luminaire.
- the image display device of the present invention comprises at least an excitation source and the phosphor of the present invention, such as a fluorescent display tube (VFD), a field emission display (FED), a plasma display panel (PDP), a cathode ray tube (CRT), and the like.
- the phosphor of the present invention emits light by excitation such as vacuum ultraviolet rays of 100 to 90 nm, ultraviolet rays of 190 to 380 nm, and electron beams.
- the image display device as described above can be configured by the combination of the above.
- the specific inorganic compound of the present invention has a red object color, it can be used as a red pigment or a red fluorescent pigment.
- the inorganic compound of the present invention is illuminated with sunlight or fluorescent light, a red object color is observed, the coloration is good, and the inorganic compound is not deteriorated over a long period of time.
- the nitride of the present invention absorbs ultraviolet light, it is also suitable as an ultraviolet absorber. Therefore, when used as a paint, applied to the surface of a plastic product, or kneaded into the interior, it has a high effect of blocking ultraviolet light and has a high effect of protecting the product from deterioration due to ultraviolet light.
- the raw powder has an average particle size of 0.5 / xm and an oxygen content of 0.93 weight. /. , ⁇ type content 92% silicon nitride powder, specific surface area 3.3m 2 Zg, oxygen content 0.79 ° /.
- Aluminum nitride powder, calcium nitride powder, and europium nitride synthesized by nitriding europium metal in ammonia were used.
- This mixed powder was put into a crucible made of boron nitride and set in an electric furnace of a graphite resistance heating system.
- the baking operation is as follows. First, the baking atmosphere is evacuated by a diffusion pump, heated from room temperature to 800 ° C at a rate of 500 ° C per hour, and nitrogen is introduced at 800 and the bluntness is 99.999% by volume. The temperature was raised to 1800 ° C at 500 ° C / hour and maintained at 1800 ° C for 2 hours.
- the obtained fired body was coarsely ground, then ground by hand using a crucible and a mortar made of silicon nitride sintered body, and passed through a 30 ⁇ eye sieve.
- the average particle size was 15 ⁇ .
- the constituent crystal phase of the obtained synthetic powder was identified by the following procedure. First, in order to obtain pure C a A 1 S i N 3 containing no ⁇ element serving as a standard substance, the nitride Kei-containing powder and aluminum powder and calcium nitride powder nitride, each 34.088 weight 0/0, 29.883 weight %, 36. 029% by weight, and mixed in an agate pestle and mortar in a glove box for 30 minutes, then put into a boron nitride crucible and placed in a graphite resistance heating furnace. I set it.
- the baking atmosphere is vacuumed by a diffusion pump, heated from a greenhouse to 800 ° C at a rate of 500 ° C per hour, and nitrogen with a purity of 99.999 volume ° / 0 at 800 ° ⁇ is introduced.
- the temperature was raised to 1800 ° C at 500 per hour, and the temperature was kept at 1800 ° C for 2 hours.
- the synthesized sample is crushed using an agate mortar, and Powder using a line 1789S
- the composition of this powder was analyzed by the following method. First, the sample was placed 5 Omg in a platinum crucible, after heated and melted by the addition of sodium carbonate 0. 5 ⁇ and Hou acid 0. 2 g, the solution for measurement as constant volume of 100 m l dissolved in hydrochloric 2m 1 Produced. The liquid sample was subjected to ICP emission spectroscopy to determine the amounts of Si, Al, Eu, and Ca in the powder sample. Also, 2 ⁇ ⁇ g of the sample was put into a tin capsule, and this was put in a nickel basket. Was quantified. Measurements, E u:. 0. 8 6 ⁇ 0 01 mass 0/0, C a:. 28.
- composition of the synthesized inorganic compound calculated from the analysis results of all elements, E u 0 .. . 78 C a o. 9922 S i o. 9997 A 1 o. 99 96 N 2. 782 O 0. Is 172.
- those in which a part of N is replaced by O Even within that range, a red phosphor with high brightness can be obtained even in that case.
- Example 2 Using a raw material powder according to Example 1, to obtain the pure C a A 1 S i N 3 containing no M element, a nitride Kei-containing powder and aluminum powder and calcium nitride powder nitride, each 34.088 weight 0 / 0, 29.88 3 wt 0/0, 36, 029 wt%, and made by and sea urchin weighed, to prepare a powder in the same manner as in example 1. End was synthesized according to the X-ray diffraction measurement, it was confirmed that the C a A l S i N 3 . When the emission spectrum of the synthesized inorganic compound was measured, no significant emission peak was observed in the range of 570 nm to 700 nm. Examples 2 to 7;
- inorganic compounds having a composition in which part or all of Ca was replaced with Ba were produced.
- Inorganic compounds were prepared in the same manner as in Example 1, except for the compositions shown in Tables 1, 2, and 3. X-ray diffraction measurement confirmed that the synthesized powder was an inorganic compound having the same crystal structure as Ca A 1 Si N 3 .
- the excitation and emission spectra of the synthesized inorganic compound were measured, as shown in Figs. 4, 5 and Table 6, the excitation was performed with ultraviolet light and visible light of It was confirmed that the phosphor was a red phosphor having an emission peak in the range of 70 nm to 700 nm. Note that the emission luminance decreases as the amount of added Ba increases, so that the composition in a region where the amount of added Ba is small is preferable. Examples 8 to 15;
- Phosphors were prepared in the same manner as in Example 1 except for the compositions shown in Tables 1, 2, and 3.
- X-ray diffraction measurement confirmed that the synthesized powder was an inorganic compound having the same crystal structure as CaA 1 SiN 3 .
- the excitation and emission spectra of the synthesized inorganic compounds were measured.
- Figures 6 and 7 (Examples 8 to 11), Figure-8 and Figure 9 (Examples 12 to 15), and Table 6 show the results. As shown in the figure, it was confirmed that the phosphor was excited by ultraviolet light and visible light from 350 nm to 6 ⁇ 0 nm and had a red emission peak in the range of 570 nm to 700 nm. Was done.
- the emission luminance decreases as the amount of Sr added increases, but the emission peak wavelength shifts to a shorter wavelength side than the addition of Ca alone, so the peak in the range of 600 nm to In order to obtain a phosphor having a wavelength, it is effective to replace one part of C a with S r. Examples 16 to 25;
- Example 16 to 25 a composition was obtained in which part or all of Ca was replaced with Mg. A machine tie was prepared.
- Phosphors were prepared in the same manner as in Example 1 except for the compositions shown in Tables 1, 2, and 3. Powder synthesized according to the X-ray diffraction measurement, it was confirmed C a A l S i N 3 identical crystal structure is a lifting one inorganic compound. The excitation and emission spectra of the synthesized inorganic compounds were measured, and as shown in Figs. 10 and 11, and Table 6, the excitation and emission spectra were excited by ultraviolet and visible light from 350 nm to 60011 m. It was confirmed to be a red phosphor having an emission peak in the range of 70 nm to 700 nm. In addition, since the light emission luminance decreases when the amount of added Mg is large, the composition in a region where the amount of added Mg is small is preferable. Examples 26 to 30;
- the composition was studied.
- a phosphor was produced in the same manner as in Example 1 except for tartar shown in Tables 7 and 8.
- X-ray diffraction measurement confirmed that the synthesized powder was an inorganic conjugate having the same crystal structure as CaA 1 SiN 3 .
- the excitation and emission spectra of the synthesized inorganic compound were measured, as shown in Figs. 12 and 13, the excitation was performed with ultraviolet light from 350 nm to 600 nm and visible light, and It was confirmed to be a red phosphor having an emission peak in the 700 nm range. It should be noted that since the light luminance is reduced when the oxygen addition amount is large, the composition in a region where the oxygen addition amount is small is preferable. Table 7. Design composition parameters
- Example 10 Using the same raw material powder as in Example 1, to obtain an inorganic compound (mixed composition of the raw material powder, Table 10 shows the composition parameter), the silicon nitride powder, the aluminum nitride powder, the calcium nitride powder, After weighing the europium powder and mixing with a mortar and a mortar for 30 minutes, the resulting mixture is molded by applying a pressure of 20 MPa using a mold to have a diameter of 12 mm and a thickness of 5 mm. Molded article. All of the steps of weighing, mixing, and molding the powder were performed in a glove box capable of maintaining a nitrogen atmosphere of 1 Ppm or less in moisture and 1 Ppm or less in oxygen.
- the compact was placed in a crucible made of boron nitride and set in a graphite resistance heating type electric furnace.
- the calcination operation first, the firing atmosphere was evacuated by a diffusion pump, a greenhouse or we heated at a rate per hour 500 ° C to 800 ° C, 800 ° (in a purity of 99.999 body product 0/0 Nitrogen Introduce the pressure to IMP a and heat up to 1800 ° C at 500 ° C per hour Then, the temperature was maintained at 180 ° C. for 2 hours. After firing, the constituent crystal phase of the obtained sintered body was identified, and as a result, it was determined to be a Ca A 1 Si N 3 group crystal phase.
- Example 3 1 0.0005 0.9995 1 1 3
- Example 32 0.001 0.999 1-1 3
- Example 33 0.002 0.998 1 1 3
- Example 34 0.02 0.98 1 1 3
- Example 35 0.032 0.968 1 1 3
- Example 36 0.06 0.94 1 1 3
- Example 37 0.1 0.9 1 1 3
- Example 38-56 as 60 to 76, to prepare a E u a C a b S i c A 1 d N e that put on the composition c, d, inorganic compounds having a composition varying e parameters.
- Phosphors were prepared in the same manner as in Example 1 except for the compositions shown in Tables 12 and 13. Synthesized powder according to the X-ray diffraction measurement, it was confirmed that a powder containing C a A l S i N 3 one lifting the same crystal structure and an inorganic compound. The excitation and emission spectra of the synthesized inorganic compounds were measured, and as shown in Table 14, the excitation and emission spectra were in the range of 570 nm to 700 nm when excited by ultraviolet and visible light from 350 nm to 60011 m. It was confirmed that the phosphor was a red phosphor having an emission peak.
- examples 77-84 were prepared Eu a C a b D c E d X e D in the composition, E, inorganic compounds having a composition varying X element.
- Phosphors were prepared in the same manner as in Example 1 except for the composition shown in Table 15 and Table: L6.
- X-ray diffraction measurement confirmed that the synthesized powder was a powder containing an inorganic compound having the same crystal structure as CaA 1 SiN 3 .
- the excitation and emission spectra of the synthesized inorganic compounds were measured, and as shown in Table 17, they were excited by ultraviolet light and visible light from 350 nm to 600 nm, and ranged from 570 nm to 700 nm. It was confirmed that the phosphor was a red phosphor having an emission peak.
- Table 1 5.
- Design refinement parameters Table 1 6. Mixing composition of raw material powder (unit: mass%) Table 17 7. Peak wavelength and intensity of excitation and emission spectrum in fluorescence measurement
- Example 8 5-9 to produce a M a C a b S ⁇ C A 1 d (N, O) inorganic compound having a composition varying M elemental in e composition.
- Phosphors were produced in the same manner as in Example 1 except for the compositions shown in Tables 18 and 19. Synthesized powder according to the X-ray diffraction measurement, it was confirmed that a powder containing C a A 1 S i N 3 one lifting the same crystal structure as the inorganic ⁇ f ⁇ thereof. Excitation and emission spectra of the synthesized inorganic compound were measured. As shown in Table 17, the inorganic compound was excited by ultraviolet light and visible light from 350 nm to 600 nm. Was confirmed to be a red phosphor having an emission peak in the range of 570 nm to 700 lam. In Example 89, light emission with a peak wavelength of 550 nm was shown.
- Eu 2 0 3 powder, C a 3 N 2 powder in oxygen content 9 mole 0/0 represented the number of moles of oxygen to the total number of moles of nitrogen and oxygen, the oxygen content, 2 mol 0 / 0 Si 3 N 4 powder, the same oxygen content 2 mol 0 /.
- the oxygen content represented by the number of moles of oxygen with respect to the total number of moles of nitrogen and oxygen in the raw material mixed powder was 5% by mole.
- the Ca 3 N 2 powder contains oxygen by using a material containing oxygen at a desired concentration as a raw material to be fired, and the Si 3 N 4 powder contains oxygen at a desired concentration.
- A1N powder contains oxygen at a desired concentration and contains oxygen by using the material having the desired concentration as the material to be fired.
- it is put into a boron nitride crucible so as to have a bulk density of 0.35 g / cm 3, and nitrogen is mixed in a high-purity nitrogen atmosphere having an oxygen concentration of 10 ppm or less. It baked for 10 hours at 1600 ° C using an electric furnace at a pressure of 1.1 atm.
- the raw material in an oxygen existing ratio at firing is 5 mol 0/0 by calculating from the oxygen concentration and the mixing ratio of each raw material in the raw materials.
- the crystal phase generated in the obtained phosphor was identified by powder X-ray diffraction, and as a result, it was confirmed that a C a A 1 S i N 3 group crystal phase was generated.
- the fluorescence characteristics of this phosphor were measured by excitation with a wavelength of 465 nni using a fluorescence spectrophotometer. The fluorescence characteristics were obtained when the peak intensity of a commercially available Ce-activated yttrium aluminum garnet-based phosphor was set to 100.
- the phosphor has a high peak emission intensity of 128 and a peak wavelength of 65
- Example 1 0 Except for the use of E u F 3 instead of eu 2 0 3, thereby obtaining the phosphor powder in the same manner as in Example 1 0 1.
- the oxygen content represented by the number of moles of oxygen relative to the total number of moles of nitrogen and oxygen in the raw material mixed powder was 5% by mole.
- the oxygen content in the raw material at the time of firing is 5 mol% by calculating from the oxygen concentration in each raw material and the mixing ratio of each raw material.
- the crystal phase formed in the obtained violet body was identified by powder X-ray diffraction, and as a result, it was confirmed that a C a A 1 S i N 3 group crystal phase was formed.
- the fluorescence characteristics of this phosphor were measured by excitation with a wavelength of 465 nm using a fluorescence spectrophotometer. Assuming that the peak intensity of a commercially available Ce-activated lithium aluminum garnet-based phosphor was set to 100, it was obtained. The phosphor thus obtained had a high emission intensity of 114, showing red light having a peak wavelength of 65 O nm.
- 2 Omg of the obtained phosphor sample was put into a tin capsule, and this was put in a nickel basket. With a mold oxygen nitrogen analyzer, analysis of the concentrations of nitrogen and oxygen of the powder sample, the sum of nitrogen and oxygen, and contained 9 5 mole 0/0 and oxygen 5 mol% nitrogen.
- the oxygen content represented by the number of moles of oxygen with respect to the total number of moles of nitrogen and oxygen in the raw material mixed powder was 5% by mole.
- the ratio of oxygen present in the raw material at the time of firing is 5 mol% by calculating from the oxygen concentration in each raw material and the mixing ratio of each raw material.
- the crystal phase formed in the obtained phosphor was identified by a powder X-ray diffraction method. As a result, it was confirmed that a C a A 1 S i] ⁇ 3 group crystal phase was formed.
- the peak intensity of a commercially available Ce-activated lithium alloy garnet-based phosphor was set to 100. In this case, the obtained phosphor had a high peak emission intensity of 112, and showed red light with a peak wavelength of 649 nm.
- E u 2 0 3 instead using E u N to the, nitrogen pressure 1 0 atm, except that the firing time was 2 hours to obtain a phosphor powder in the same manner as in Example 1 0 1.
- the oxygen content represented by the number of moles of oxygen with respect to the total number of moles of nitrogen and oxygen in the raw material mixed powder was 5 mol '%.
- the ratio of oxygen present in the raw material at the time of firing is 5 mol% by calculating from the oxygen concentration in each raw material and the mixing ratio of each raw material.
- the crystal phase generated in the obtained phosphor was identified by powder X-ray diffraction, and as a result, it was confirmed that a C a A 1 S i N 3 group crystal phase was generated.
- the fluorescence characteristics of this phosphor excited by a wavelength of 465 nm were measured with a fluorescence spectrophotometer. Assuming that the peak intensity of the active aluminum aluminum garnet-based phosphor is 100, the resulting phosphor has a high peak intensity of 109 and a high emission intensity, and a red light having a peak wavelength of 65501 m. showed that.
- Example 101 0.008 0.992 1 1 0.35 1600 10 1.15 Eu 2 0 3 128 652
- Example 102 0.008 0.992 1 1 0.35 1600 10 1.1 5 EuF 3 114 650
- Example 103 0.008 0.992 1 1 0.35 1600 2 1.1 5 EuN 1 12 649
- Fig. 14 shows a schematic structural diagram of a white LED as a lighting fixture.
- the phosphor of Example 1 of the present invention C a 0, 75 E u 0. 25 S i 8. 625 A 13. 375 0 1.
- a C -——— sialon having a composition of 875 a structure in which a yellow phosphor of Eu is dispersed in a resin layer and covered on a blue LED 2.
- the LED 2 emits 450 iim light, which excites the yellow and red phosphors to emit yellow and red light, and the LED light is mixed with the yellow and red light to produce light of a bulb color. Function as a lighting device that emits light.
- the lighting device manufactured by the composition design different from the above-mentioned composition is shown.
- 3 8 0 nm ultraviolet as a light emitting element: with L ED, the phosphor of Example 1 of the present invention, the blue fluorescent material (B aMg A l 10 O 17 : E u) and the green phosphor ( B aMgAl 10 O 17 : Eu, Mn) is dispersed in a resin layer to cover the ultraviolet LED.
- the LED emits 380 nm light, which excites the red, green, and blue phosphors to emit red, green, and blue light. These lights are mixed to function as an R light device that emits white light.
- the lighting device produced by the compounding scale different from the above-mentioned compounding is shown.
- the phosphor of Example 1 of the present invention and a green phosphor (BaMgA1 ⁇ O ⁇ EuMn) were dispersed in a resin layer using blue: LED of 450 nm as a light emitting element.
- LED of 450 nm As a light emitting element.
- the LED When a current is applied to the conductive terminal, the LED emits light of 450 nm, which excites the red and green phosphors to emit red and green light. It functions as a lighting device that emits white light by mixing the blue light of the LED with green and red.
- FIG. 15 is a schematic diagram showing the principle of a plasma display panel as an image display device.
- Red and green phosphors (Z n 2 S i 0 4 : Mn) of Example 1 of the present invention and a blue phosphor (B aMg A l 10 O 17 : E u) each cell 1 1, 1 2 , 13 are applied to the inner surface.
- the nitride phosphor of the present invention emits light at a longer wavelength than conventional sialon or oxynitride phosphors, is excellent as a red phosphor, and further has a reduced luminance of the phosphor when exposed to an excitation source. Because of its low content, it is a nitride phosphor suitable for use in VFD, FED, PDP, CRT, white LED, etc. In the future, it is expected to be greatly utilized in the material design of various display devices and contribute to the development of industry.
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Abstract
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Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
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EP04799893.5A EP1696016B1 (en) | 2003-11-26 | 2004-11-25 | Phosphor and light emission appliance using phosphor |
KR1020177008626A KR20170039310A (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
KR1020107005847A KR101294555B1 (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조방법 |
KR1020187024989A KR102055115B1 (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
KR1020157001297A KR20150027223A (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
CN2004800409677A CN1918262B (zh) | 2003-11-26 | 2004-11-25 | 荧光体和使用荧光体的发光装置 |
KR1020097016000A KR101157006B1 (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
EP12176679.4A EP2574652B1 (en) | 2003-11-26 | 2004-11-25 | Phosphor and light-emitting equipment using phosphor |
KR1020147005916A KR20140039337A (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
KR1020127002475A KR101173450B1 (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조방법 |
KR1020137018826A KR101624390B1 (ko) | 2003-11-26 | 2004-11-25 | 형광체의 제조 방법 |
US11/441,094 US8409470B2 (en) | 2003-11-26 | 2006-05-26 | Phosphor and light-emitting equipment using phosphor |
US13/775,334 US20130168606A1 (en) | 2003-11-26 | 2013-02-25 | Phosphor and light-emitting equipment using phosphor |
US14/736,487 US9738829B2 (en) | 2003-11-26 | 2015-06-11 | Phosphor and light-emitting equipment using phosphor |
US15/626,372 US10072207B2 (en) | 2003-11-26 | 2017-06-19 | Phosphor and light-emitting equipment using phosphor |
US16/055,343 US11084980B2 (en) | 2003-11-26 | 2018-08-06 | Phosphor and light-emitting equipment using phosphor |
US17/361,880 US11697765B2 (en) | 2003-11-26 | 2021-06-29 | Phosphor and light-emitting equipment using phosphor |
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JP2003394855 | 2003-11-26 | ||
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JP2004-041503 | 2004-02-18 | ||
JP2004-154548 | 2004-05-25 | ||
JP2004154548 | 2004-05-25 | ||
JP2004-159306 | 2004-05-28 | ||
JP2004159306A JP3837588B2 (ja) | 2003-11-26 | 2004-05-28 | 蛍光体と蛍光体を用いた発光器具 |
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EP (2) | EP2574652B1 (ja) |
JP (1) | JP3837588B2 (ja) |
KR (12) | KR101173450B1 (ja) |
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