Study of the preparation conditions for NiMn2O4 grown from hydroxide precursors

An investigation of mixed oxide route preparation routes for nickel manganite has confirmed that residual nickel oxide is present regardless of the particular conditions adopted. The co-precipitation of mixed hydroxides of nickel and manganese was successfully used to eliminate any unreacted nickel...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2006, Vol.26 (6), p.901-908
Main Authors: ASHCROFT, G, TERRY, I, GOVER, R
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
Technical ceramics
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Summary:An investigation of mixed oxide route preparation routes for nickel manganite has confirmed that residual nickel oxide is present regardless of the particular conditions adopted. The co-precipitation of mixed hydroxides of nickel and manganese was successfully used to eliminate any unreacted nickel oxide remaining after firing, though the requirements for single phase nickel manganite were investigated in detail and found to be quite stringent. Synthesised materials were characterised by XRD measurements with diffraction patterns analysed using the Rietveld technique. A systematic investigation into the optimum firing conditions confirmed that a minimal impurity content is achieved in samples rapidly heated to 800 C, and fired for at least 48 h. Nickel oxide was found to be the dominant impurity phase at higher firing temperatures. 34 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2004.11.023