纳米结构MgAl2O4陶瓷中自由体积实体的o - ps相关模式研究

A. Ingram, H. Klym, O. Shpotyuk, I. Hadzaman
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引用次数: 0

摘要

利用o- ps相关模式研究了干燥和水浸处理后纳米尖晶石MgAl2O4陶瓷中的自由体积实体。结果表明,铝酸镁陶瓷的吸水过程导致晶界附近添加相扩展缺陷的正电子俘获率相应增加。这些相萃取和陶瓷结构中的自由体积实体是正电子穿透陶瓷的特定俘获中心。结果表明,Tao-Eldrup模型可以用第三和第四组分的o-Ps寿命来计算MgAl2O4陶瓷的自由体积(或纳米孔尺寸)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
O-Ps-related modes for study of free-volume entities in nanostructured MgAl2O4 ceramics
The o-Ps-related modes are used for study of free-volume entities in nanostructured spinel MgAl2O4 ceramics after drying and water-immersion treatment. It is established that that water-sorption processes in magnesium aluminate ceramics leads to corresponding increase in positron trapping rates of extended defects located as addition phases near grain boundaries. These phase extractions and free-volume entities in ceramic structure serve as specific trapping centers for positrons penetrating ceramics. It is demonstrated that Tao-Eldrup model can be adequately used for the calculation free volume (or nanopores size) in MgAl2O4 ceramics using o-Ps lifetimes of the third and the fourth components.
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