GB639273A - Improvements relating to methods of preparing dielectric materials - Google Patents
Improvements relating to methods of preparing dielectric materialsInfo
- Publication number
- GB639273A GB639273A GB2816747A GB2816747A GB639273A GB 639273 A GB639273 A GB 639273A GB 2816747 A GB2816747 A GB 2816747A GB 2816747 A GB2816747 A GB 2816747A GB 639273 A GB639273 A GB 639273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating
- methods
- titanium dioxide
- dielectric materials
- sulphate
- 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
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 Compounds Of Heavy Metals (AREA)
Abstract
Dielectric material is prepared by heating uncompacted, finely divided titanium dioxide, the crystal structure of which does not correspond with that of rutile, at a temperature above 1200 DEG C., preferably up to 1400 DEG C. in the presence of 0.1-0.3 per cent aluminium oxide until the crystals possess an average size of 1-2 microns. Pigment grade anatase titanium dioxide is suitably used as the starting material. Salts, e.g. the sulphate, nitrate and acetate, decomposing at the reaction temperature may be used as the source of the alumina; suitably, aluminium sulphate may be added to an aqueous slurry of titanium oxide, which is then brought to a pH of 6-7 with ammonia dewatered and dried prior to heating at 1250 DEG C. for 6-12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2816747A GB639273A (en) | 1947-10-21 | 1947-10-21 | Improvements relating to methods of preparing dielectric materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2816747A GB639273A (en) | 1947-10-21 | 1947-10-21 | Improvements relating to methods of preparing dielectric materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB639273A true GB639273A (en) | 1950-06-28 |
Family
ID=10271344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2816747A Expired GB639273A (en) | 1947-10-21 | 1947-10-21 | Improvements relating to methods of preparing dielectric materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB639273A (en) |
-
1947
- 1947-10-21 GB GB2816747A patent/GB639273A/en not_active Expired
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