GB889990A - Improvements in or relating to ceramic dielectrics, processes for producing the same, and electric capacitors provided with such dielectrics - Google Patents
Improvements in or relating to ceramic dielectrics, processes for producing the same, and electric capacitors provided with such dielectricsInfo
- Publication number
- GB889990A GB889990A GB5789/58A GB578958A GB889990A GB 889990 A GB889990 A GB 889990A GB 5789/58 A GB5789/58 A GB 5789/58A GB 578958 A GB578958 A GB 578958A GB 889990 A GB889990 A GB 889990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ceramic
- metal
- dielectrics
- feb
- oxide
- 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
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
Abstract
889,990. Ceramic dielectrics. SIEMENS & HALSKE A.G. Feb. 21, 1958 [Feb. 21, 1957; Feb. 22, 1957], No. 5789/58. Drawings to Specification. Class 37. In a method of making a ceramic dielectric, a substance having a tetragonally or rhombically distorted Perovskite crystal structure, and which is in the ferro-electric state, is converted to an anti-ferro-electric state by incorporating into the ceramic an oxide of a metal which can form bivalent and trivalent oxides. The ferroelectric ceramic has the formula Me" Me<1v> O3 (Me<11>, Me<1v> being metals from Groups II and IV of the Periodic Table), and the metal whose oxide is added to this ceramic is from Group X (Me<x>), the total atomic proportion of the metals Me" and Me<x> not exceeding the atomic proportion of the metal Me<1v>. The metal Me<1v> is preferably titanium; Me" is preferably an alkaline earth metal such as calcium, strontium or barium; and Me<x> is preferably nickel. A mixture of barium carbonate, titanium oxide, nickel trioxide, and zirconium dioxide is heated at 1000‹ C. for about two hours; the resulting ceramic, having a distorted Perovskite structure and a composition of the form (Ba, Ni) (Ti, Zr)O3, is ground to a grain size below 2Á and pressed into the required shape to constitute a capacitor dielectric, using a hydrocarbon plasticizer. The dielectric slab so formed is sintered in an oxidizing atmosphere at 1320‹ C. for about ten minutes. Specifications 703,030 and 758,145 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE889990X | 1957-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB889990A true GB889990A (en) | 1962-02-21 |
Family
ID=6834763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5789/58A Expired GB889990A (en) | 1957-02-21 | 1958-02-21 | Improvements in or relating to ceramic dielectrics, processes for producing the same, and electric capacitors provided with such dielectrics |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB889990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT17569U1 (en) * | 2019-09-30 | 2022-07-15 | Tdk Electronics Ag | Polycrystalline ceramic solid, dielectric electrode with the solid, device with the electrode and method of manufacture |
-
1958
- 1958-02-21 GB GB5789/58A patent/GB889990A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT17569U1 (en) * | 2019-09-30 | 2022-07-15 | Tdk Electronics Ag | Polycrystalline ceramic solid, dielectric electrode with the solid, device with the electrode and method of manufacture |
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