GB424601A - Improvements relating to the production of electrical insulating materials - Google Patents
Improvements relating to the production of electrical insulating materialsInfo
- Publication number
- GB424601A GB424601A GB5782/34A GB578234A GB424601A GB 424601 A GB424601 A GB 424601A GB 5782/34 A GB5782/34 A GB 5782/34A GB 578234 A GB578234 A GB 578234A GB 424601 A GB424601 A GB 424601A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flux
- clay
- mass
- soapstone
- talc
- 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
- C04B35/16—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 silicates other than clay
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
In making an electrical insulator of a ceramic nature from a magnesium silicate mass comprising from about 70 to 90 per cent soapstone or talc and an alkaline-earth flux, the flux is one or more of the oxides or oxide-yielding compounds of beryllium, calcium, strontium or barium, alumina as such being excluded from the mass, while clay, if employed at all, is present in an amount less than that of the flux. The product after firing is a densely-sintered and substantially glass-free structure of well-formed large crystals with a comparatively low dielectric loss. Preferably, the clay amounts to less than 40 per cent of the amount of the flux. An example of a suitable mass is: 83 soapstone or talc, 9 barium carbonate, 4,5 calcium carbonate, 3,5 clay-like material. Three other examples are given. Specifications 347,486 and 367,114 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE424601X | 1933-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424601A true GB424601A (en) | 1935-02-25 |
Family
ID=6476925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5782/34A Expired GB424601A (en) | 1933-02-21 | 1934-02-21 | Improvements relating to the production of electrical insulating materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB424601A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE937760C (en) * | 1939-08-25 | 1956-01-12 | Porzellanfabrik Kahla | Process for the production of devices made of glass and ceramic workpieces |
| DE1014476B (en) * | 1953-08-24 | 1957-08-22 | British Thomson Houston Co Ltd | Process for improving the properties of ceramic materials |
-
1934
- 1934-02-21 GB GB5782/34A patent/GB424601A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE937760C (en) * | 1939-08-25 | 1956-01-12 | Porzellanfabrik Kahla | Process for the production of devices made of glass and ceramic workpieces |
| DE1014476B (en) * | 1953-08-24 | 1957-08-22 | British Thomson Houston Co Ltd | Process for improving the properties of ceramic materials |
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