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TiO_2在Al_2O_3-ZrO_2电熔料共晶体中的固溶行为
作者:高振昕 周宁生 王天仇 梁兰芳 
单位:中钢集团洛阳耐火材料研究院 河南科技大学高温材料研究院 上海永和耐火材料有限公司 东兴耐火材料有限公司 河南洛阳471039  河南洛阳471003  上海200436  辽宁大石桥115103 
关键词:二氧化钛  固溶  电熔锆刚玉  氧化铝/氧化锆共晶  氧化锆固溶体 
分类号:TQ174
出版年,卷(期):页码:2005,33(9):1145-1148
DOI:
摘要:
用扫描电镜对含25%(质量分数)ZrO2和适量TiO2的电熔锆刚玉的显微结构分析表明:这种电熔料的显微结构由等粒状初晶刚玉和刚玉ZrO2共晶组成。能量散射X射线分析结果表明:TiO2固溶于共晶体的ZrO2中而不溶于刚玉。TiO2在共晶体ZrO2中的固溶度为10%左右。此现象可由TiO2ZrO2系相图具有很大的ZrO2固溶相区和结晶学中有关离子半径和电价匹配的原理而得以解释。
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The microstructure of fused zirconia-corundum material containing 25%ZrO_(2) in mass and some TiO_(2) was characterized by scanning electron microscope and energy dispersive X-ray analysis.The results indicate that the microstructure of such material is formed primarily by crystallization of equa-granular corundum and corundum-zirconia(C+Z) eutectic.TiO_(2) is solid soluble in ZrO_(2) grains in the(C+Z) eutectic,but is not soluble in corundum.The solid solubility of TiO_(2)in ZrO_(2) is around 10%.This phenomenon can be interpreted by the fact that a large primary phase region of the ZrO_(2) solid solution phase exists in the diagram of the TiO_(2)-ZrO_(2) system and by the principles of crystallography related to the ionic radius and valence compatibilities.
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参考文献:
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