GB2413127B - Microwave dielectric ceramic - Google Patents

Microwave dielectric ceramic

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Publication number
GB2413127B
GB2413127B GB0507459A GB0507459A GB2413127B GB 2413127 B GB2413127 B GB 2413127B GB 0507459 A GB0507459 A GB 0507459A GB 0507459 A GB0507459 A GB 0507459A GB 2413127 B GB2413127 B GB 2413127B
Authority
GB
United Kingdom
Prior art keywords
dielectric ceramic
microwave dielectric
microwave
ceramic
dielectric
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.)
Expired - Fee Related
Application number
GB0507459A
Other versions
GB0507459D0 (en
GB2413127A (en
Inventor
David Martin Iddles
Duncan Muir
Timothy James Price
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Remec International Holdings SRL
Filtronic Comtek PLC
Original Assignee
Remec International Holdings SRL
Filtronic Comtek PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB0408192A external-priority patent/GB0408192D0/en
Priority claimed from GB0501259A external-priority patent/GB0501259D0/en
Application filed by Remec International Holdings SRL, Filtronic Comtek PLC filed Critical Remec International Holdings SRL
Priority to GB0713583A priority Critical patent/GB2440048B/en
Priority to GB0713582A priority patent/GB2440047B/en
Publication of GB0507459D0 publication Critical patent/GB0507459D0/en
Publication of GB2413127A publication Critical patent/GB2413127A/en
Application granted granted Critical
Publication of GB2413127B publication Critical patent/GB2413127B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • C04B35/46—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 titanium oxides or titanates
    • C04B35/462—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 titanium oxides or titanates based on titanates
    • C04B35/465—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates
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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
    • C04B35/46—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 titanium oxides or titanates
    • C04B35/462—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 titanium oxides or titanates based on titanates
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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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62625—Wet mixtures
    • C04B35/6264—Mixing media, e.g. organic solvents
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/3229—Cerium oxides or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3275—Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3286—Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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    • C04B2235/658—Atmosphere during thermal treatment
    • C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
    • C04B2235/6585—Oxygen containing atmosphere, e.g. with changing oxygen pressures at an oxygen percentage above that of air
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    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
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    • C04B2235/77—Density

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
GB0507459A 2004-04-13 2005-04-13 Microwave dielectric ceramic Expired - Fee Related GB2413127B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0713583A GB2440048B (en) 2004-04-13 2005-04-13 Microwave dielectric ceramic
GB0713582A GB2440047B (en) 2004-04-13 2005-04-13 Microwave dielectric ceramic

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0408192A GB0408192D0 (en) 2004-04-13 2004-04-13 Microwave dielectric ceramic
GB0501259A GB0501259D0 (en) 2005-01-21 2005-01-21 Microwave dielectric ceramic

Publications (3)

Publication Number Publication Date
GB0507459D0 GB0507459D0 (en) 2005-05-18
GB2413127A GB2413127A (en) 2005-10-19
GB2413127B true GB2413127B (en) 2008-04-02

Family

ID=34621672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0507459A Expired - Fee Related GB2413127B (en) 2004-04-13 2005-04-13 Microwave dielectric ceramic

Country Status (1)

Country Link
GB (1) GB2413127B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2429011B (en) 2005-08-10 2007-05-30 Filtronic Comtek Microwave Dielectric Ceramic
CN103601481B (en) * 2013-09-16 2015-07-15 南通万宝实业有限公司 Preparation method of novel rare earth co-doped FB9 permanent magnet used for variable frequency motor
CN113336539A (en) * 2021-07-01 2021-09-03 无锡市高宇晟新材料科技有限公司 Microwave dielectric ceramic material, preparation method and application

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670409A (en) * 1984-11-27 1987-06-02 Kyocera Corporation Dielectric ceramic material
JPS62283863A (en) * 1986-05-29 1987-12-09 日立フェライト株式会社 Dielectric ceramic composition for microwave
JPH0817244A (en) * 1994-06-30 1996-01-19 Korea Advanced Inst Of Sci Technol Dielectric composition for microwave
JPH0817246A (en) * 1994-06-30 1996-01-19 Korea Advanced Inst Of Sci Technol Dielectric composition for high frequency
US5840642A (en) * 1996-08-17 1998-11-24 Korea Institute Of Science And Technology Dielectric material for microwave of CaTIO3 -La(Mg1/2 Ti1/2) O3 -LaAlO3 group

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670409A (en) * 1984-11-27 1987-06-02 Kyocera Corporation Dielectric ceramic material
JPS62283863A (en) * 1986-05-29 1987-12-09 日立フェライト株式会社 Dielectric ceramic composition for microwave
JPH0817244A (en) * 1994-06-30 1996-01-19 Korea Advanced Inst Of Sci Technol Dielectric composition for microwave
JPH0817246A (en) * 1994-06-30 1996-01-19 Korea Advanced Inst Of Sci Technol Dielectric composition for high frequency
US5840642A (en) * 1996-08-17 1998-11-24 Korea Institute Of Science And Technology Dielectric material for microwave of CaTIO3 -La(Mg1/2 Ti1/2) O3 -LaAlO3 group

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
WPI Abstract Accession No. 1988-024322 & JP 62283863 A (Nippon Ferrite KK) 09/12/1987 (see abstract) *
WPI Abstract Accession No. 1996-121238 & JP 08017244 A (Korea Inst Science Technology) 19/01/1996 (see abstract) *
WPI Abstract Accession No. 1996-121240 & JP 08017246 A (Korea Inst Science Technology) 19/01/1996 (see abstract) *

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Publication number Publication date
GB0507459D0 (en) 2005-05-18
GB2413127A (en) 2005-10-19

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