Solution Combustion Synthesis of (Co,Fe)Cr₂O₄ pigments

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• 作者：S. Mestre ; ^{sergio.mestre@itc.uji.es} ; M.D. Palacios ; P. Agut
• 关键词：Powders-chemical preparation ; Microstructure-final ; Spinels ; Colour ; Pigment
• 刊名：Journal of the European Ceramic Society
• 出版年：2012
• 期刊代码：53_09552219
• 类别：ms
• 出版时间：July, 2012
• 卷：32
• 期：9
• 页码：1995-1999
• 文件大小：648 K

摘要

The synthesis of mixed cobalt-iron chromites, Fe_1鈭?em>唯Co_唯Cr₂O₄ (0 鈮?#xA0;唯 鈮?#xA0;1), has been studied by Solution Combustion Synthesis using urea as fuel. Characterization by XRD and SEM showed that crystallinity, cell parameters, crystallite size and grain size depend on 唯. The higher is the cobalt content of the initial composition the greater are these four characteristics, but evolution of cell parameters, crystallite size and grain size is not regular, since the variations are more pronounced for the spinels with high iron content. Apparently, the method causes some deficiency in the oxygen content of the spinels and a slight enrichment in chromium with respect to the theoretical composition, but does not alter the proportions of iron and cobalt.

All synthesized chromites showed a high tinting strength in ceramic glazes without any additional annealing step.