GB1003898A - Glass-ceramic capacitors and method of making - Google Patents
Glass-ceramic capacitors and method of makingInfo
- Publication number
- GB1003898A GB1003898A GB633064A GB633064A GB1003898A GB 1003898 A GB1003898 A GB 1003898A GB 633064 A GB633064 A GB 633064A GB 633064 A GB633064 A GB 633064A GB 1003898 A GB1003898 A GB 1003898A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- hour
- temperature
- raised
- room temperature
- 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
- 239000002241 glass-ceramic Substances 0.000 title abstract 4
- 239000003990 capacitor Substances 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 238000002425 crystallisation Methods 0.000 abstract 2
- 230000008025 crystallization Effects 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- 239000006066 glass batch Substances 0.000 abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract 2
- 239000001257 hydrogen Substances 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 229910052793 cadmium Inorganic materials 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 229910052712 strontium Inorganic materials 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G4/129—Ceramic dielectrics containing a glassy phase, e.g. glass ceramic
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
-
- 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 OR LIGHT-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
Abstract
A glass-ceramic body, for use as a barrier layer capacitor and having an interior portion which is chemically reduced so as to be electrically conductive and surface portions oxidized to be electrically non-conductive, is made by melting a glass batch comprising, by weight 5-15% SiO2, 5-15% Al2O3 and 70-90% BaO + TiO2, the ratio SiO2 : Al2O3 being from 3 : 1 to 1 : 3 and the molar ration BaO : TiO2 being from 0.90 : 1 to 1.2 : 1, simultaneously cooling the melt below its transformation point and shaping a glass body therefrom, thereafter exposing the glass body to a temperature of from 850 DEG to 1250 DEG C., under reducing conditions, for a time sufficient to attain the desired reduced semi-crystalline body, subsequently exposing the reduced glass-ceramic body to a temperature of from 700 DEG to 1050 DEG C. in an oxidizing atmosphere so as to oxidize the surface portion, and finally cooling the body. The glassceramic body formed in this way has BaTiO3 crystals comprising at least 30% by weight of the body which are all finer than 2 microns in diameter. In one particular example of producing such a body the glass batch is melted, shaped and cooled to room temperature. The temperature is then raised at 200 DEG C. per hour to 1050 DEG C. and maintained there for 4 hours, and then raised at 200 DEG C. to 1150 DEG C. and maintained there for 1/2 hour, subsequently the article being cooled at 400 DEG C./hour to room temperature, all these steps being effected in the presence of dry hydrogen. The hydrogen is then replaced by air and the temperature raised at 200 DEG C./minute to 910 DEG C., held there for three minutes and then lowered at 400 DEG C./minute to room temperature. The crystallization time is from 1/4 -8 hours, and the oxidation time 1 second to 1 hour. The heating rate before crystallization should not exceed 500 DEG C./hour. Fluorine is present in quantities less than 2% to aid melting. The oxides of Ca, Cd, Cu, Mn, P, Pb, Sr, Zn and Zr may be added, the total not exceeding 10% by weight of the batch. Specifications 829,557 and 905,253 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26287763A | 1963-03-05 | 1963-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1003898A true GB1003898A (en) | 1965-09-08 |
Family
ID=22999451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB633064A Expired GB1003898A (en) | 1963-03-05 | 1964-02-14 | Glass-ceramic capacitors and method of making |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE644761A (en) |
| CH (1) | CH434478A (en) |
| DE (1) | DE1496088A1 (en) |
| GB (1) | GB1003898A (en) |
| NL (2) | NL6402221A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2235090A (en) * | 1989-08-17 | 1991-02-20 | Vaisala Oy | "Contacts for semiconductor transducers" |
| US11098006B2 (en) | 2016-03-11 | 2021-08-24 | Ryboquin Company Ltd | Lipids and complexes for the delivery of biologically-active material to cells |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2441450C3 (en) * | 1974-08-29 | 1985-02-21 | TDK Corporation, Tokio/Tokyo | Ceramic capacitor and method of its manufacture |
| DE3012839A1 (en) * | 1979-04-11 | 1980-10-16 | Tdk Electronics Co Ltd | ELECTRIC CAPACITOR |
| EP0145123A3 (en) * | 1983-11-21 | 1985-07-03 | Corning Glass Works | A method of manufacturing a barrier layer capacitor |
| JPH0815128B2 (en) * | 1986-02-27 | 1996-02-14 | 太陽誘電株式会社 | Reduction-reoxidation type semiconductor ceramic capacitor and manufacturing method thereof |
-
0
- NL NL128146D patent/NL128146C/xx active
-
1964
- 1964-02-14 GB GB633064A patent/GB1003898A/en not_active Expired
- 1964-03-03 DE DE19641496088 patent/DE1496088A1/en active Pending
- 1964-03-05 BE BE644761A patent/BE644761A/xx unknown
- 1964-03-05 NL NL6402221A patent/NL6402221A/xx unknown
- 1964-03-05 CH CH286264A patent/CH434478A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2235090A (en) * | 1989-08-17 | 1991-02-20 | Vaisala Oy | "Contacts for semiconductor transducers" |
| GB2235090B (en) * | 1989-08-17 | 1993-11-17 | Vaisala Oy | Multilayer semi-conductor elements and their manufacture |
| US11098006B2 (en) | 2016-03-11 | 2021-08-24 | Ryboquin Company Ltd | Lipids and complexes for the delivery of biologically-active material to cells |
Also Published As
| Publication number | Publication date |
|---|---|
| BE644761A (en) | 1964-09-07 |
| NL6402221A (en) | 1964-09-07 |
| DE1496088A1 (en) | 1969-04-03 |
| NL128146C (en) | |
| CH434478A (en) | 1967-04-30 |
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