| 摘要 |
1,149,007. Calcia-stabilized zirconia. GENERAL ELECTRIC CO. 29 July, 1966 [30 July,. 1965], No. 34087/66. Heading C1J. Zirconia stabilized by 10 to 20 mole per cent of calcium oxide is further treated by a first annealing at 1400‹ C. or above and a second annealing at 1000‹ to 1300‹ C. for at least 30 hours. The first annealing is preferably for an hour, and the second between 1250‹ and 1260‹ C. The zirconia may be polycrystalline or a single crystal, and may be made by plasma spraying and sintering of calcia-stabilized zirconia. The treatment reduces its rate of increase of ionic resistivity at any particular temperature, when the zirconia is used as a solid electrolyte. |
