Sol–gel synthesis and sintering of submicronic copper molybdate (α-CuMoO4) powders

A sol–gel method was proposed to prepare copper II molybdate α-CuMoO4 powders. A gel was first obtained via the polymerizable complex method, using citric acid as complexing and polymerizing agent, dried at 120°C and decomposed at 300°C. A calcination in the temperature range 400–500°C for 2h led to...

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Bibliographic Details
Published in:Ceramics international 2014-05, Vol.40 (4), p.5371-5377
Main Authors: Benchikhi, Mohamed, El Ouatib, Rachida, Guillemet-Fritsch, Sophie, Yves Chane-Ching, Jean, Er-Rakho, Lahcen, Durand, Bernard
Format: Article
Language:English
Subjects:
A. Sintering
B. Grain size
Chemical preparation
Chemical Sciences
Material chemistry
Powders
Sol–gel
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Summary:A sol–gel method was proposed to prepare copper II molybdate α-CuMoO4 powders. A gel was first obtained via the polymerizable complex method, using citric acid as complexing and polymerizing agent, dried at 120°C and decomposed at 300°C. A calcination in the temperature range 400–500°C for 2h led to the pure phase α-CuMoO4. The different powders obtained were characterized by X ray diffraction analysis and by transmission (TEM) and scanning (SEM) electron microscopies. Ceramics were prepared using conventional sintering and spark plasma sintering (SPS) techniques. A maximal relative density of 94.8% was reached after conventional sintering at 520°C for 2h. In the case of SPS, the densification was optimized by varying the temperature, the time and the applied pressure. Higher densities, up to 98.7%, were obtained at very low temperature, i.e., 300°C, for 5min only under a pressure of 225MPa.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2013.10.118