发明名称 |
Alkali-metal-beta-and beta''-alumina and gallate polycrystalline ceramics and fabrication by a vapor phase method |
摘要 |
A ceramic composite containing alkali-metal- beta - or beta ''-alumina and an oxygen-ion conductor is fabricated by converting alpha -alumina to alkali-metal- beta - or beta ''-alumina. A ceramic composite with continuous phases of alpha -alumina and the oxygen-ion conducting ceramic, such as zirconia, is exposed to a vapor containing an alkali-metal oxide, such as an oxide of sodium or potassium. Alkali metal ions diffuse through alkali-metal- beta - or beta ''-alumina converted from alpha -alumina and oxygen ions diffuse through the oxygen-ion conducting ceramic to a reaction front where alpha -alumina is converted to alkali-metal- beta - or beta ''-alumina. A stabilizer for alkali-metal- beta ''-alumina is preferably introduced into the alpha -alumina/oxygen-ion conductor composite or introduced into the vapor used to convert the alpha -alumina to an alkali-metal- beta ''-alumina. |
申请公布号 |
AU2099299(A) |
申请公布日期 |
1999.07.26 |
申请号 |
AU19990020992 |
申请日期 |
1998.12.31 |
申请人 |
MATERIALS AND SYSTEMS RESEARCH, INC. |
发明人 |
ANIL VASUDEO VIRKAR;JAN-FONG JUE;KUAN-ZONG FUNG |
分类号 |
G01N27/409;C04B35/00;C04B35/113;C04B35/48;H01M6/18;H01M10/39 |
主分类号 |
G01N27/409 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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