Microstructure and optical properties of transparent alumina
Microstructure and optical properties of transparent alumina
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DOI：
10.1016/j.actamat.2008.11.010
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发表时间：
2009-03-01
期刊：
影响因子：
9.4
通讯作者：
Kagawa, Yutaka
中科院分区：
文献类型：
--
作者：
Kim, Byung-Nam;Hiraga, Keijiro;Kagawa, Yutaka
在1100和1550摄氏度之间的温度下通过放电等离子体烧结来评估氧化铝的微观结构和光学性质。随着烧结温度的升高，Lip到1250 ℃时发生晶粒长大和致密化，而在1300 ℃以上，晶粒快速长大和气孔发生长大。透光率随着致密化而增加，随着晶粒/孔隙的生长而减小。结果表明，光的前向透射和反射与孔隙率和孔隙生长有关，而光的顺向透射和光的吸收分别与晶粒尺寸和缺陷有关。利用Mie散射理论、模型预测和观察到的微观结构特征解释了这些关系。(C)2008 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The microstructure and optical properties are evaluated for alumina sintered by spark plasma sintering at temperatures between 1100 and 1550 degrees C. With increasing sintering temperature, grain growth and densification occur Lip to 1250 degrees C, and above 1300 degrees C, rapid grain growth and pore growth Occur. Light transmission increases with the densification and decreases with the grain/pore growth. It is found that the total forward transmission and the reflection of light are related to the porosity and the pore growth, whereas the in-line transmission and the light absorption are related to the grain size and the defects, respectively. The relationships are explained by using the Mie scattering theory, model prediction and observed microstructural characteristics. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.