GB591551A - Improvements in or relating to electrical insulating compositions - Google Patents
Improvements in or relating to electrical insulating compositionsInfo
- Publication number
- GB591551A GB591551A GB311245A GB311245A GB591551A GB 591551 A GB591551 A GB 591551A GB 311245 A GB311245 A GB 311245A GB 311245 A GB311245 A GB 311245A GB 591551 A GB591551 A GB 591551A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- water
- mica
- frit
- glass
- 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
- 239000000203 mixture Substances 0.000 title abstract 5
- 239000010445 mica Substances 0.000 abstract 3
- 229910052618 mica group Inorganic materials 0.000 abstract 3
- 239000011230 binding agent Substances 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- 150000003609 titanium compounds Chemical class 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 210000003491 Skin Anatomy 0.000 abstract 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 abstract 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002178 crystalline material Substances 0.000 abstract 1
- 238000010494 dissociation reaction Methods 0.000 abstract 1
- 230000005593 dissociations Effects 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 235000019353 potassium silicate Nutrition 0.000 abstract 1
- 239000005871 repellent Substances 0.000 abstract 1
- 229910052895 riebeckite Inorganic materials 0.000 abstract 1
- -1 sodium-potassium Chemical compound 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
- H01B3/085—Particles bound with glass
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
A machinable electric insulating composition comprises a finely-divided crystalline material having a high dielectric constant and consisting of titania and/or a titanate, mixed with a finely divided mineral capable of imparting machinable properties, e.g., mica or asbestos, and a bond consisting of a glass frit which softens below the temperature of dissociation of mica. Water or a solution of water glass may be used as a temporary binder; alternatively no binder may be used and the ingredients packed in a mould and heated as rapidly as possible to a temperature of 1100-1400 DEG F. to soften the glass. The frit may be a sodium-potassium or lead borate. If the product is relatively porous, it may be impregnated with a wax or other water-repellent substance of high insulating value. The titanium compound may amount to 75 per cent. of the composition, but the proportions are normally 10-60 per cent. titanium compound, 10-50 per cent. mica, and 30-40 per cent. frit, with water from 8-12 per cent. of the mixture. After moulding, the composition is cooled slowly, the outer skin is ground off, and the formed material is then cut and machined as required.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB591551A true GB591551A (en) | 1947-08-21 |
Family
ID=1627583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB311245A Expired GB591551A (en) | 1945-02-07 | Improvements in or relating to electrical insulating compositions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB591551A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772334A (en) * | 1951-03-28 | 1956-11-27 | Merlin Gerin | Refractory body for electrical apparatus |
| US2941060A (en) * | 1953-05-06 | 1960-06-14 | Ite Circuit Breaker Ltd | Arc extinguishing means for high voltage circuit breakers |
| DE1098059B (en) * | 1955-02-25 | 1961-01-26 | Welwyn Electrical Lab Ltd | Method of making a vitreous dielectric material |
-
1945
- 1945-02-07 GB GB311245A patent/GB591551A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772334A (en) * | 1951-03-28 | 1956-11-27 | Merlin Gerin | Refractory body for electrical apparatus |
| US2941060A (en) * | 1953-05-06 | 1960-06-14 | Ite Circuit Breaker Ltd | Arc extinguishing means for high voltage circuit breakers |
| DE1098059B (en) * | 1955-02-25 | 1961-01-26 | Welwyn Electrical Lab Ltd | Method of making a vitreous dielectric material |
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