GB912307A - Improvements in or relating to ceramic dielectric materials - Google Patents
Improvements in or relating to ceramic dielectric materialsInfo
- Publication number
- GB912307A GB912307A GB2544260A GB2544260A GB912307A GB 912307 A GB912307 A GB 912307A GB 2544260 A GB2544260 A GB 2544260A GB 2544260 A GB2544260 A GB 2544260A GB 912307 A GB912307 A GB 912307A
- Authority
- GB
- United Kingdom
- Prior art keywords
- increased
- barium titanate
- reduction
- july
- upper limit
- 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 1
- 239000003989 dielectric material Substances 0.000 title 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 3
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000002305 electric material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000011946 reduction process Methods 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
912,307. Semi-conductor devices; capacitors. SIEMENS & HALSKE A.G. July 21, 1960 [July 21, 1959], No. 25442/60. Class 37. A chemically-reduced sintered ceramic material has a grain size less than 5 Ám. The Specification explains that for a sintered ferro-electric material such as barium titanate the dielectric constant of the material is increased if the grain size is maintained small. Accordingly the reduction process is carried out in a temperature range the upper limit of which is approximately 30‹ C. below the sintering temperature of the non-conductive starting body of barium titanate. The temperature is kept as close as possible to the upper limit for as short a time as possible to prevent the grains from growing together. The thickness of the barrier layer is also increased but the reduction of capacity is more than offset by the increase in dielectric constant and at the same time the breakdown voltage is increased. The Figure shows a construction of capacitor in which a disc of barium titanate 1 made " N "-conductive by reduction in the manner described has fired to it silver coatings 2, 3 in an oxygen atmosphere so that the oxygen content of the titanate is greater than in the interior, producing PN junctions on both sides of the device so as to block an applied A.C. in both directions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1959S0064021 DE1233061B (en) | 1959-07-21 | 1959-07-21 | Method of manufacturing a junction capacitor made of ferroelectric material having a perovskite structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB912307A true GB912307A (en) | 1962-12-05 |
Family
ID=7496831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2544260A Expired GB912307A (en) | 1959-07-21 | 1960-07-21 | Improvements in or relating to ceramic dielectric materials |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1233061B (en) |
| GB (1) | GB912307A (en) |
| NL (1) | NL252759A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE960527C (en) * | 1951-02-28 | 1957-03-21 | Siemens Ag | Process for the production of sintered titanate bodies |
| CA567939A (en) * | 1955-05-27 | 1958-12-23 | R. Roup Rolland | Electrical circuit elements |
-
0
- NL NL252759D patent/NL252759A/xx unknown
-
1959
- 1959-07-21 DE DE1959S0064021 patent/DE1233061B/en active Pending
-
1960
- 1960-07-21 GB GB2544260A patent/GB912307A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL252759A (en) | |
| DE1233061B (en) | 1967-01-26 |
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