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Preparation of the high temperature proton conductor Ba3Ca1.18Nb1.82O8.73 via a wet chemical route

✍ Scribed by E Zimmer; K Scharf; T Mono; J Friedrich; T Schober

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 327 KB
Volume: 97
Category: Article
ISSN: 0167-2738
DOI: 10.1016/s0167-2738(97)00062-3

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✦ Synopsis

Ba Ca Nb O belongs to the class of complex perovskites recently introduced by Nowick et al. which are suitable 3 1.18 1.82 92d

as high temperature proton conductors (HTPCs). Here, its synthesis is described using a procedure which starts with the preparation of a solution containing Ba and Ca as acetates and Nb as a dispersed hydroxide precipitate. Further steps include the preparation of a paste, freeze drying, calcination and sintering. The characterization procedures include density and porosity measurements, X-ray diffraction, transmission electron microscopy, conductivity measurements and, finally, thermogravimetry to check the water absorbing properties. Overall, the properties are comparable to those of conventionally prepared samples.

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