Sol-Gel Synthesis and Effects of Neodymium and Europium Oxides on the Structuring of Calcium Monoaluminate

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS Glass and Ceramics Pub Date : 2024-04-27 DOI:10.1007/s10717-024-00647-4

F. G. Khomidov, Z. R. Kadyrova

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Abstract

Calcium monoaluminate was synthesized by the sol–gel method and the effect of europium and neodymium oxides on the synthesis and structuring kinetics was studied in the temperature range 500 – 1000°C. It was determined that the formation of the structure of calcium monoaluminate occurs at 1000°C and with exposure for 4 h of a xerogel obtained based on a mixture of Al(NO₃)₃ + Ca(NO₃)₂ at a compound ratio of 2 : 1, respectively. In the sample obtained, the intermediate mineral is mayenite Ca₁₂Al₁₄O₃₃. With the introduction of the mineralizing europium oxide Eu₂O₃ in an amount of 1.5 wt.% greater than 100 wt.% in Al(NO₃)₃ + Ca(NO₃)₂ composition, at a synthesis temperature of 1000°C, the exposure time for maximum formation of calcium monoaluminate is reduced to 1 h. In samples containing Nd₂O₃, for the maximum formation of calcium monoaluminate at the same exposure time, it is necessary to introduce it in an amount of 5 wt.%.

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溶胶-凝胶合成以及钕和铕氧化物对单铝酸钙结构的影响

采用溶胶-凝胶法合成了单铝酸钙，并在 500 - 1000°C 的温度范围内研究了铕和钕氧化物对合成和结构动力学的影响。结果表明，单铝酸钙结构的形成分别发生在 1000°C 和接触以 Al(NO3)3 + Ca(NO3)2 混合物为基础、化合物比例为 2 : 1 的异凝胶 4 小时之后。在获得的样品中，中间矿物是麦饭石 Ca12Al14O33。在铝(NO3)3 + 钙(NO3)2 成分中，引入矿化铕氧化物 Eu2O3 的量为 1.5 重量%，大于 100 重量%，合成温度为 1000°C，最大形成单铝酸钙的暴露时间缩短为 1 小时。

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来源期刊

Glass and Ceramics 工程技术-材料科学：硅酸盐

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass and Ceramics reports on advances in basic and applied research and plant production techniques in glass and ceramics. The journal''s broad coverage includes developments in the areas of silicate chemistry, mineralogy and metallurgy, crystal chemistry, solid state reactions, raw materials, phase equilibria, reaction kinetics, physicochemical analysis, physics of dielectrics, and refractories, among others.