Critical Particle Size for the Formation of Ceria-Zirconia Solid Solution by Solid Phase Reaction near Room Temperature Estimated from Average Particle Size
Critical Particle Size for the Formation of Ceria-Zirconia Solid Solution by Solid Phase Reaction near Room Temperature Estimated from Average Particle Size
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根据平均粒径估算室温附近固相反应形成氧化铈-氧化锆固溶体的临界粒径
DOI：
10.2109/jcersj.109.1270_570
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发表时间：
2001
影响因子：
1.1
通讯作者：
M. Sugiura
中科院分区：
文献类型：
--
作者：
A. Suda;H. Sobukawa;T. Kandori;Y. Ukyo;M. Sugiura
最近报道了在湿磨过程中通过二氧化铈和氧化锆粉末在接近室温下的固相反应形成二氧化铈-氧化锆固溶体。固相反应是二氧化铈颗粒与固溶体发生较大的塑性变形、破碎和相互结合而发生的。本研究检查了可以发生固相反应的颗粒的尺寸。当平均粒径达到28nm以下时，开始由大的二氧化铈颗粒(4m2/g)形成二氧化铈-氧化锆固溶体的反应。粒径大于30nm的CeO2粉末不发生该反应。二氧化铈粉末与氧化锆开始反应的临界粒径被认为约为20nm，这是通过X射线衍射和比表面积测量两种方法渐近发现的。
The formation of ceria-zirconia solid solution by the solid phase reaction of ceria and zirconia powders near room temperature during wet attrition milling was recently reported. The solid phase reaction occurred as a result of a large plastic deformation, breaking and mutual combining on the ceria particle as well as the solid solution. The size of the particle in which the solid phase reaction can occur was examined in this study. The reaction that forms ceria-zirconia solid solution from large ceria particles (4m2/g) begins when the average particle size reaches 28nm or smaller. The reaction does not occur in CeO2 powder with particle size larger than 30nm. The critical particle size of ceria powder to begin the reaction with zirconia is thought to be approximately 20nm, which was found asymptotically by two methods, X-ray diffraction and specific surface area measurements.