JP6238683B2 - 導電性粒子 - Google Patents
導電性粒子 Download PDFInfo
- Publication number
- JP6238683B2 JP6238683B2 JP2013230767A JP2013230767A JP6238683B2 JP 6238683 B2 JP6238683 B2 JP 6238683B2 JP 2013230767 A JP2013230767 A JP 2013230767A JP 2013230767 A JP2013230767 A JP 2013230767A JP 6238683 B2 JP6238683 B2 JP 6238683B2
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- conductive particles
- tin oxide
- mass
- core material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002245 particle Substances 0.000 title claims description 145
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 63
- 229910001887 tin oxide Inorganic materials 0.000 claims description 63
- -1 silane compound Chemical class 0.000 claims description 53
- 229910052710 silicon Inorganic materials 0.000 claims description 46
- 239000011162 core material Substances 0.000 claims description 45
- 239000010703 silicon Substances 0.000 claims description 45
- 229910000077 silane Inorganic materials 0.000 claims description 30
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 239000002335 surface treatment layer Substances 0.000 claims description 12
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 6
- 125000005641 methacryl group Chemical group 0.000 claims description 5
- 239000011342 resin composition Substances 0.000 claims description 5
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 claims description 4
- 125000003277 amino group Chemical group 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 44
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 22
- 150000001875 compounds Chemical class 0.000 description 21
- 239000002243 precursor Substances 0.000 description 21
- 239000002002 slurry Substances 0.000 description 18
- 239000007788 liquid Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 150000001282 organosilanes Chemical class 0.000 description 12
- 238000002156 mixing Methods 0.000 description 11
- 239000004033 plastic Substances 0.000 description 11
- 229920003023 plastic Polymers 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 8
- 239000012298 atmosphere Substances 0.000 description 8
- 238000006386 neutralization reaction Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000011268 mixed slurry Substances 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910052787 antimony Inorganic materials 0.000 description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 description 4
- 125000001165 hydrophobic group Chemical group 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229940079864 sodium stannate Drugs 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 150000003377 silicon compounds Chemical class 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 150000003606 tin compounds Chemical class 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 2
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- HCFAJYNVAYBARA-UHFFFAOYSA-N 4-heptanone Chemical compound CCCC(=O)CCC HCFAJYNVAYBARA-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 229920002845 Poly(methacrylic acid) Chemical class 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000007771 core particle Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
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- 150000002484 inorganic compounds Chemical group 0.000 description 2
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 2
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
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- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical compound C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 description 1
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- PTTPXKJBFFKCEK-UHFFFAOYSA-N 2-Methyl-4-heptanone Chemical compound CC(C)CC(=O)CC(C)C PTTPXKJBFFKCEK-UHFFFAOYSA-N 0.000 description 1
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- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 1
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
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- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
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- 230000002378 acidificating effect Effects 0.000 description 1
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- 125000004103 aminoalkyl group Chemical group 0.000 description 1
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- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
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- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- INJVFBCDVXYHGQ-UHFFFAOYSA-N n'-(3-triethoxysilylpropyl)ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCN INJVFBCDVXYHGQ-UHFFFAOYSA-N 0.000 description 1
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
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- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 description 1
- DLRJIFUOBPOJNS-UHFFFAOYSA-N phenetole Chemical compound CCOC1=CC=CC=C1 DLRJIFUOBPOJNS-UHFFFAOYSA-N 0.000 description 1
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- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
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- BJDLPDPRMYAOCM-UHFFFAOYSA-N triethoxy(propan-2-yl)silane Chemical compound CCO[Si](OCC)(OCC)C(C)C BJDLPDPRMYAOCM-UHFFFAOYSA-N 0.000 description 1
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Description
前記導電性酸化スズが存在する部位は、該部位中に、前記導電性粒子の質量に対して0.005質量%以上0.50質量%以下のケイ素を含有し、
前記表面域の表面に、有機シラン化合物を含む有機表面処理層を有する、導電性粒子を提供するものである。
得られた混合スラリーをpH調整して、前記芯材の表面にスズ及びケイ素を含む共沈物を生成させて、共沈物付着粒子を製造し、
前記共沈物付着粒子を還元雰囲気下で焼成して、前記共沈物から、ケイ素を含有する導電性酸化スズの表面域が芯材の表面に生成した前駆体粒子を製造し、
前記前駆体粒子と有機シラン化合物とを混合して、前記表面域の表面に有機シラン化合物を含む有機表面処理層を形成する、導電性粒子の製造方法を提供するものである。
本実施例では、芯材表面を、ケイ素を含む導電性酸化スズで被覆した導電性粒子を製造した。芯材である硫酸バリウム粒子(BET比表面積26m2/g、粒径D500.12μm)150gを、水1500mlに分散させた。得られた分散スラリーを75℃まで加熱した後、25%水酸化ナトリウム水溶液を滴下して、分散スラリーのpHを12程度に調整した。pH調整後の分散スラリーに、ケイ酸ナトリウム1gを添加した。次いで、スズ酸ナトリウム(Na2SnO3、純度96%)270gを水500mlに溶解してなるスズ酸ナトリウム水溶液を全量、分散スラリーに添加した。その後、分散スラリーを30分間攪拌した後、20%硫酸水溶液を90分間かけて添加してpH2.5まで中和した。中和後のスラリーをpH2.5、75℃に保持しながら3時間熟成した。熟成後のスラリーをろ過し、固形分を水で洗浄した後、乾燥した。得られた乾燥物を、横型チューブ炉中で、2体積%H2/N2雰囲気下で500℃、2時間還元焼成して、ケイ素を含む導電性酸化スズからなる表面域を芯材の表面に有する前駆体粒子を得た。
以下の表1に示す条件(芯材の種類、ケイ酸ナトリウム量、スズ酸ナトリウム量及び有機シランの種類)に代えた以外は実施例1と同様にして導電性粒子の粉末を得た。
以下の表1に示す条件を用いた以外は実施例1と同様にして導電性粒子の粉末を得た。比較例1は、導電性酸化スズの表面域にケイ素を含有させなかった例である。比較例2は、有機表面処理層を形成しなかった例である。
実施例及び比較例で得られた導電性粒子について、BET比表面積、圧粉抵抗、粒径D50、明度L値を上述の方法で測定した。また、導電性粒子に含まれる酸化スズ及び炭素の割合を上述の方法で測定した。更に、酸化スズからなる表面域に含まれるケイ素の割合(対導電性粒子の質量)、及び有機表面処理層に含まれるケイ素の割合(対導電性粒子の質量)を上述の方法で測定した。更に導電性粒子から形成された導電膜の抵抗及びヘイズを以下の方法で測定した。これらの結果を以下の表2に示す。
導電膜は以下の方法で成膜した。容積50mLのプラスチック製容器を用意し、その中に導電性粒子7.41gを入れた。次に、この容器内にトルエンとn−ブタノールとの混合溶媒を9.64g入れた。トルエンとn−ブタノールとの容積比は7:3とした。更に、この容器内に三菱レイヨン製のアクリル系コーティング樹脂であるダイヤナールLR−167を6.41g入れた。LR−167は樹脂成分が約46%であり、残部がトルエンとn−ブタノールとの混合溶媒であった。トルエンとn−ブタノールとの容積比は7:3であった。次いでペイントシェーカー(浅田鉄鋼製)を用い、1時間分散を行った。ペイントシェーカーの運転条件は、60Hz環境下の標準運転条件とした。分散によって得られた塗工液を、ポリエチレンテレフタレート製のOHPフィルム(株式会社内田洋行製のトランスペアレンシー OHP用フィルム)に塗工した。塗工にはバーコーター#10( テスター産業株式会社製のROD No.10)を用い、使用液量約1mLで塗膜を形成した。塗膜形成後、大気下に80℃で15分間にわたり乾燥を行い、導電膜を得た。このようにして得られた導電膜の表面抵抗を、三菱アナリテック製のハイレスタを用いて測定した。測定にはUPプローブを用いた。測定電圧は10Vとした。
上述の方法で形成された導電膜を測定対象として、日本電色工業(株)製のヘイズメータであるMODEL 1001DP(商品名)によってヘイズを測定した。測定はJIS K7105に準拠し、積分球式測定法により行った。ヘイズは(散乱光/全光線透過光)×100から算出した。
Claims (8)
- 少なくとも表面域が導電性酸化スズを含む導電性粒子において、
前記導電性酸化スズが存在する部位は、該部位中に、前記導電性粒子の質量に対して0.005質量%以上0.50質量%以下のケイ素を含有し、
前記表面域の表面に、有機シラン化合物を含む有機表面処理層を有し、
前記導電性酸化スズが、ドープ元素を実質的に非含有である酸素欠損型の導電性酸化スズである、導電性粒子。 - 芯材からなる中心域と、芯材の表面に形成された前記表面域とを有する請求項1に記載の導電性粒子。
- 前記導電性粒子における導電性酸化スズの含有割合が15質量%以上99質量%以下である請求項2に記載の導電性粒子。
- 前記芯材が、金属酸化物又は金属硫酸塩である請求項2又は3に記載の導電性粒子。
- 前記芯材が、アルミナ、二酸化チタン、二酸化ケイ素若しくは酸化ジルコニウムであるか、又は硫酸バリウムである請求項4に記載の導電性粒子。
- 前記有機シラン化合物が、アルキル基含有有機シラン化合物、メタクリル基含有有機シラン化合物、アミノ基含有有機シラン化合物又はシリコーンオイルである請求項1ないし5のいずれか一項に記載の導電性粒子。
- 1−ペンタノール中に分散させた状態で、レーザー回折散乱式粒度分布測定法によって測定された累積体積50容量%における体積累積粒径D50が100nm以上1000nm以下である請求項1ないし6のいずれか一項に記載の導電性粒子。
- 請求項1ないし7のいずれか一項に記載の導電性粒子と樹脂とを含有する樹脂組成物。
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