GB933059A - Barium titanate dielectric - Google Patents
Barium titanate dielectricInfo
- Publication number
- GB933059A GB933059A GB3170160A GB3170160A GB933059A GB 933059 A GB933059 A GB 933059A GB 3170160 A GB3170160 A GB 3170160A GB 3170160 A GB3170160 A GB 3170160A GB 933059 A GB933059 A GB 933059A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ceramic
- temperature
- titanate
- fired
- minutes
- 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
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 title abstract 3
- 229910002113 barium titanate Inorganic materials 0.000 title abstract 3
- 239000000919 ceramic Substances 0.000 abstract 12
- 239000000203 mixture Substances 0.000 abstract 4
- 230000001590 oxidative effect Effects 0.000 abstract 3
- DJOYTAUERRJRAT-UHFFFAOYSA-N 2-(n-methyl-4-nitroanilino)acetonitrile Chemical compound N#CCN(C)C1=CC=C([N+]([O-])=O)C=C1 DJOYTAUERRJRAT-UHFFFAOYSA-N 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 2
- 229910052788 barium Inorganic materials 0.000 abstract 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 239000003989 dielectric material Substances 0.000 abstract 2
- 238000010304 firing Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract 2
- 239000001257 hydrogen Substances 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 238000010405 reoxidation reaction Methods 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 abstract 1
- 229920000647 polyepoxide Polymers 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
- H01G4/1272—Semiconductive ceramic capacitors
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
Alkaline earth, especially barium, titanate ceramic dielectrics are produced by firing the green ceramic body in an oxidizing atmosphere, e.g. air at 2300 DEG -2800 DEG F. until the dielectric constant is in the range 8000-10000 and then heating to 2300-2800 DEG F. for 10-80 minutes in a reducing atmosphere, e.g. hydrogen. Ceramic bodies thus produced have dielectric constants in excess of 25000. For the production of a capacitor circuit element, electrodes are formed on the reduced ceramic body by the application of metallic electrode compositions, e.g. a silver glaze. The heated dielectric bodies are then fired in an oxidative atmosphere at 1400 DEG -1500 DEG F. for 1/2 -10 minutes when a controlled degree of reoxidation takes place. According to an example, a ceramic composition containing at least 50% by weight of barium titanate and the rest made up of strontium titanate and calcium zirconate was fired in a ceramic kiln on a 20 hour cycle with a maximum temperature of 2500 DEG F. maintained for 2 hours, then reduced for 1/2 hour at a temperature of 2400 DEG F. and reoxidized for one minute at a temperature of 1450 DEG F. Specification 664,370 is referred to.ALSO:Alkaline earth, especially barium, titanate ceramic dielectrics are produced by firing the green ceramic body in an oxidising atmosphere e.g. air at 2300-2800 DEG F until the dielectric constant is in the range 8000-10000 and then heating to 2300-2800 DEG F for 10-80 minutes in a reducing atmosphere e.g. hydrogen. Ceramic bodies thus produced have dielectric constants in excess of 25000. For the production of a capacitor circuit element, electrodes are formed on a reduced ceramic disc by the application of metallic electrode compositions e.g. a silver glaze. The heated dielectric discs are then fired in an oxidative atmosphere at 1400-1500 DEG F for 1/2 -10 minutes when a controlled degree of reoxidation takes place. According to an example, a ceramic composition containing p at least 50% by weight of barium titanate and the rest made up of strontium titanate and calcium zirconate was fired in a ceramic kiln on a 20 hour cycle with a maximum temperature of 2500 DEG F maintained for 2 hours, then reduced for 1/2 hour at a temperature of 2400 DEG F and reoxidized for one minute at a temperature of 1450 DEG F. An epoxy resin may be applied after cooling. Specification 664,370 is referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3170160A GB933059A (en) | 1960-09-14 | 1960-09-14 | Barium titanate dielectric |
| FR872612A FR1299490A (en) | 1960-09-14 | 1961-09-07 | Ceramic capacitor |
| FR957035A FR84980E (en) | 1960-09-14 | 1963-12-12 | Ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3170160A GB933059A (en) | 1960-09-14 | 1960-09-14 | Barium titanate dielectric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB933059A true GB933059A (en) | 1963-07-31 |
Family
ID=10327112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3170160A Expired GB933059A (en) | 1960-09-14 | 1960-09-14 | Barium titanate dielectric |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB933059A (en) |
-
1960
- 1960-09-14 GB GB3170160A patent/GB933059A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES8308141A1 (en) | Ceramic capacitors and dielectric compositions | |
| US2584324A (en) | Ceramic dielectric materials and method of making | |
| US2529719A (en) | High dielectric materials and method of producing them | |
| GB755860A (en) | Improvements in or relating to electrical ceramics | |
| DE3880895D1 (en) | DIELECTRIC CERAMIC COMPOSITION. | |
| US2729757A (en) | Ferroelectric ceramic composition and method of making same | |
| GB933059A (en) | Barium titanate dielectric | |
| GB1059956A (en) | Ceramic articles and methods of making | |
| ATE14714T1 (en) | TEMPERATURE STABLE DIELECTRIC CERAMIC COMPOSITION BASED ON BARIUM TITANATE AND CAPACITOR WITH THIS COMPOSITION. | |
| US3080239A (en) | Ceramic dielectric compositions and method of making the same | |
| US3474043A (en) | Method of manufacturing ceramic dielectrics and resistances from the same composition ceramic material | |
| US2853392A (en) | Ceramic dielectric materials | |
| US3068107A (en) | Dielectric ceramic composition | |
| US3062668A (en) | Dielectric materials and processes of manufacturing same | |
| JPS51143895A (en) | Dielectric ceramic composition | |
| US2382137A (en) | Steatite-type body and method of producing same | |
| GB849938A (en) | Dielectric ceramic compositions and the method of production thereof | |
| GB653209A (en) | An improved ceramic body suitable for use as a dielectric material and the method of manufacture thereof | |
| US2483794A (en) | Sagger | |
| GB692706A (en) | Electrostrictive ceramics and transducers utilizing them | |
| US3062667A (en) | Dielectric materials and processes of manufacturing same | |
| SU729167A1 (en) | Segnetoelectric material | |
| SU662532A1 (en) | Ferroelectric material | |
| KR890015301A (en) | Manufacturing Method of Semiconducting BaTiO₃ | |
| KR930018606A (en) | Dielectric Composition of Disk-shaped Fixed Magnetic Capacitor |