GB931744A - A ceramic dielectric material - Google Patents
A ceramic dielectric materialInfo
- Publication number
- GB931744A GB931744A GB614460A GB614460A GB931744A GB 931744 A GB931744 A GB 931744A GB 614460 A GB614460 A GB 614460A GB 614460 A GB614460 A GB 614460A GB 931744 A GB931744 A GB 931744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystals
- barium titanate
- ferro
- added
- growth
- 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
Links
- 239000000919 ceramic Substances 0.000 title abstract 2
- 239000003989 dielectric material Substances 0.000 title abstract 2
- 239000013078 crystal Substances 0.000 abstract 6
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 4
- 229910002113 barium titanate Inorganic materials 0.000 abstract 4
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 125000005402 stannate group Chemical group 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/468—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 based on barium titanates
- C04B35/4682—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 based on barium titanates based on BaTiO3 perovskite phase
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1236—Ceramic dielectrics characterised by the ceramic dielectric material based on zirconium oxides or zirconates
- H01G4/1245—Ceramic dielectrics characterised by the ceramic dielectric material based on zirconium oxides or zirconates containing also titanates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
A sintered ceramic dielectric material suitable for use in capacitors comprises two phases, one of which is formed by ferro-electric tetragonal barium titanate and the other is formed from ferro-electric mixed crystals which contain barium titanate, the Curie point of the mixed crystals being lower than that of the tetragonal barium titanate and the size of the crystals of the individual phases being smaller than 3\m. Substances (not oxides) may be added which are capable of forming ferro-electric mixed crystals with barium titanate and others may be added which restrain the growth of crystals so that the size of the crystals of the individual phases is less than 3m . Suitable materials for addition are stannates, zirconates or titanates, for example MgSnO3, MgZrO3 and MgZrSiO5, and these may be subjected to a preliminary burning (at above 1300 DEG C.) to improve their growth restraining effect. Fe and Fe2O3 may be added to restrain growth during the final sintering.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER25012A DE1117766B (en) | 1959-02-21 | 1959-02-21 | Ceramic capacitor dielectric with high dielectric constant and low temperature dependence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB931744A true GB931744A (en) | 1963-07-17 |
Family
ID=7401807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB614460A Expired GB931744A (en) | 1959-02-21 | 1960-02-22 | A ceramic dielectric material |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1117766B (en) |
| FR (1) | FR1248971A (en) |
| GB (1) | GB931744A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2634896C2 (en) * | 1976-08-03 | 1985-08-14 | Siemens AG, 1000 Berlin und 8000 München | Capacitor dielectric with internal barrier layers and process for its manufacture |
| JPS54118565A (en) * | 1978-03-07 | 1979-09-14 | Suwa Seikosha Kk | Capacitor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB574577A (en) * | 1942-12-08 | 1946-01-11 | Dubilier Condenser Co 1925 Ltd | Improvements in or relating to ceramic compositions |
| US2402516A (en) * | 1943-11-02 | 1946-06-18 | Titanium Alloy Mfg Co | High dielectric material and method of making same |
| US2801181A (en) * | 1953-08-14 | 1957-07-30 | Solar Mfg Corp | High dielectric capacitors |
| GB795450A (en) * | 1956-04-17 | 1958-05-21 | British Dielectric Res Ltd | Improvements relating to ceramic dielectric materials |
| GB795451A (en) * | 1956-04-17 | 1958-05-21 | British Dielectric Res Ltd | Improvements relating to ceramic dielectric materials |
-
1959
- 1959-02-21 DE DER25012A patent/DE1117766B/en active Pending
-
1960
- 1960-02-20 FR FR819120A patent/FR1248971A/en not_active Expired
- 1960-02-22 GB GB614460A patent/GB931744A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1248971A (en) | 1960-12-23 |
| DE1117766B (en) | 1961-11-23 |
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