High electric resistant zirconia and/or hafnia ceramics

Details High electric resistant zirconia and/or hafnia ceramics High electric resistant zirconia and/or hafnia ceramics

H - Electricity

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B

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H01B 3/12 (2006.01) C04B 35/486 (2006.01) C04B 41/88 (2006.01) C04B 41/89 (2006.01) H01M 8/12 (2006.01)

Patent

CA 1197675

Abstract of the Disclosure HIGH ELECTRIC RESISTANT ZIRCONIA AND/OR HAFNIA CERAMICS Zirconia and/or hafnia-containing ceramics having high electric resistivity and mechanical strength which consists essentially of 5-30 mol% of at least one component of Group A consisting of YO1.5, ScO1.5, SmO1.5, EuO1.5, GdO1.5, TbO1.5, DYO1.5 ,HoO1.5, ErO1.5, TmO1.5, YbO1.5, LuO1.5, CaO and MgO, 5-40 mol% of at least one component of Group B consisting of NbO2.5 and TaO2.5 and 30-90 mol% of at least one component of Group C consisting of ZrO2 and HfO2, said ceramics preferably satisfying the following equation .SIGMA.{4- (ion valence number of each component of Group A)) x (number of mole of each component of Group A)} ? (total number of mole of components of Group B). and crystal phase of said ceramics being preferred to be composed mainly of tetragonal phase.

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