Claims
- 1. A process for preparing conductive particles having a specific surface area of less than 50 m.sup.2 /g which comprises hydrolyzing a hydrolyzable tin containing or indium containing compound in an aqueous solution while controlling the pH of said solution substantially constant within the range of from 8-12 that an aqueous sol containing colloidal particles maybe formed, followed by separation, drying and calcination of the colloidal particles.
- 2. A process for preparing conductive particles having a specific area of less than 50 m.sup.2 /g which comprises providing a starting aqueous solution of a hydrolyzable tin containing or indium containing compound and an aqueous hydrolyzing solution of a pH of from 8 to 12, adding said starting aqueous solution to said hydrolyzing aqueous solution together with an alkali or acid under stirring while controlling the pH of said hydrolyzing aqueous solution substantially constant within the range of from 8 to 12 so that an aqueous sol containing colloidal particles may be formed, followed by separation, drying, and calcination of the colloidal particles.
- 3. The process as set forth in claim 1 or 2 wherein the tin containing compound is potassium stannate or sodium stannate, and the indium containing compound is indium nitrate or indium sulfate.
- 4. The process as set fourth in claim 1 or 2 wherein the hydrolysis at a temperature of carried out is 30.degree.-90.degree. C.
- 5. The process as set forth in claim 1 or 2 wherein an average particle diameter of the colloidal particles formed by the hydrolysis is 0.05-0.3 .mu.m.
Priority Claims (3)
Number |
Date |
Country |
Kind |
61-50233 |
Mar 1986 |
JPX |
|
61-179607 |
Jul 1986 |
JPX |
|
61-305906 |
Dec 1986 |
JPX |
|
Parent Case Info
This application is a continuation of now abandoned application, Ser. No. 021,482 filed on March 4, 1987, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (6)
Number |
Date |
Country |
58-36925 |
Mar 1983 |
JPX |
60-46925 |
Mar 1985 |
JPX |
60-65724 |
Apr 1985 |
JPX |
60-65760 |
Apr 1985 |
JPX |
61-205624 |
Sep 1986 |
JPX |
61-205625 |
Sep 1986 |
JPX |
Non-Patent Literature Citations (4)
Entry |
Chem. Abstract 108:134358e Sato et al. |
Chem. Abstract 102:118370y Hashimoto et al. |
Chem. Abstract 108:97192y Sato et al. |
Chem. Abstract 107:139546d Kijima et al. |
Continuations (1)
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Number |
Date |
Country |
Parent |
21482 |
Mar 1987 |
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