Method of converting a precursor ceramic solid into a solid...

Details Method of converting a precursor ceramic solid into a solid... Method of converting a precursor ceramic solid into a solid...

C - Chemistry, Metallurgy

04

B

31/190, 204/201,

C04B 35/44 (2006.01) C01F 7/02 (2006.01) C04B 35/113 (2006.01) C04B 41/00 (2006.01) G02F 1/15 (2006.01) H01B 1/08 (2006.01) H01M 6/18 (2006.01) H01M 10/34 (2006.01)

Patent

CA 1222616

- 13 - TITLE METHOD OF CONVERTING A PRECURSOR CERAMIC SOLID INTO A SOLID CERAMIC HYDRONIUM CONDUCTOR INVENTORS Michael Francis BELL, Patrick Stephen NICHOLSON, Michael SAYER and Kimihiro YAMASHITA ABSTRACT A method of converting a feed solid polycrystalline of .beta. alumina into a hydronium conductor requires the pre- selection of an appropriate feed ceramic preferably with a chemical forumula; (Na0?6K0?4)2O (3 w/o MgO) .beta./.beta." A1203 and with a f(.beta.) of 0.37 ? 0.03 wherein f(.beta.) Image The crystallographic lattice is altered by placing the solid feed ceramic in an ionic solution or melt containing two or more ionic species of different ionic radii; the composition of the melt or solution being written: M1, M2(M3...) X where M1 and M2 (and M3 etc.) are ions of dissimilar size and as examples sodium, potassium, lithium and hydronium ions. After a time the material is removed, washed and subjected to a field effect exchange whereby the desired hydronium conducting solid ceramic having the following chemical composition is achieved; (H3O?/Na?/K?)20 Z .beta./.beta."A12O3 where (a)(b)(c) = 0?1 and a + b + c = 1 and Z is a stabilizer of the .beta." phase.

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