发明名称 |
VERFAHREN ZUR HERSTELLUNG VON LANTHANCHROMIT-PULVERN MITTELS SOL-GEL. |
摘要 |
This invention relates to a process for the preparation of a crystalline compound having an empirical formula LaCrxA1-xO4yH2O where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba, x ranges from 0.99 to about 0.7 and y ranges from 0 to 0.15. The process comprises adding a solution of the appropriate metal salts to a solution of ammonium hydroxide thereby precipitating a hydroxide gel intermediate, which is dried and calcined in air to yield the resultant crystalline compound which has a huttonite structure. Additionally, this invention relates to a process for the preparation of a ceramic powder having the empirical formula LaCrxA1-xO3, where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba, and x ranges from 0.99 to about 0.7. Finally, a ceramic composition having the empirical formula LaCrxA1-xO4yH2O having a huttonite structure is also disclosed. |
申请公布号 |
DE3874149(T2) |
申请公布日期 |
1993.02.18 |
申请号 |
DE19883874149T |
申请日期 |
1988.10.20 |
申请人 |
ALLIED-SIGNAL INC. (N.D.GES.D.STAATES DELAWARE), MORRISTOWN, N.J., US |
发明人 |
OLSON, LEVIN, WILLIAM, GOLETA, CA 93117, US;YAMANIS, JEAN;LI, BEILI, MORRISTOWN, NJ 07960, US |
分类号 |
C01G37/00;C04B35/42;H01M8/02;H01M8/12 |
主分类号 |
C01G37/00 |
代理机构 |
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