Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 4, Pages 5371-5377Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.10.118
Keywords
Sintering; Grain size; Sol-gel; Powders; Chemical preparation
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Funding
- French-Moroccan projects: Volubilis Partenariat Hubert Curien [MA 09 205]
- Projet de Recherches sur Convention Internationale CNRS-CNRST [22572]
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A sol gel method was proposed to prepare copper II molybdate alpha-CuMoO4 powders. A gel was first obtained via the polymerizable complex method, using citric acid as complexing and polymerizing agent, dried at 120 degrees C and decomposed at 300 degrees C. A calcination in the temperature range 400-500 degrees C for 2 h led to the pure phase alpha-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 degrees C for 2 h. 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 degrees C, for 5 min only under a pressure of 225 MPa. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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