Application of Stereology on Neodymium-Doped Yttrium Aluminum Garnet (Nd: YAG) Transparent Ceramics
来源期刊：JOURNAL OF RARE EARTHS2006年第5期
论文作者：Shao Jing Jing Min Zhang Huashan Zhang Hongbo Su Chunhui Hou Zhaoxia Song Qiong
Key words：neodymium doped yttrium aluminum garnet; transparent ceramics; stereology; microstructure; rare earths;
Abstract: Nd: YAG precursor powders were synthesized by homogeneous precipitation, and Nd: YAG transparent ceramics were prepared by vacuum sintering at 1700 ℃ for 5 h. The ceramic materials were characterized by light transmittance and field emission gun-environment scanning microscope. Using statistics and stereology theory, study was carried out on the quantitative relationships between light transmittance and stereological parameters in three-dimensional Euclidean space. It is found that the transmittance of Nd:YAG with 1 mm in thickness is about 45% and 58% in visible and near-infrared wavelength, respectively. The transmittance linearly increases with increasing equivalent sphere diameter and reaches the theoretical value of single crystal when the equivalent sphere diameter is 20μm. The transmittance decreases with the increasing of mean specific area per unit volume of grain and discrete grains, and the transmittance decreases with increasing mean free distance of grains in Nd:YAG ceramics.
Shao Jing1，Jing Min2，Zhang Huashan1，Zhang Hongbo1，Su Chunhui1，Hou Zhaoxia1，Song Qiong1
(1.School of Materials and Chemical Engineering, Changchun University of Science and Technology, Changchun 130022, China;
2.Chinese Special Vehicle Institute, Beijing 100072, China)
Abstract:Nd: YAG precursor powders were synthesized by homogeneous precipitation, and Nd: YAG transparent ceramics were prepared by vacuum sintering at 1700 ℃ for 5 h. The ceramic materials were characterized by light transmittance and field emission gun-environment scanning microscope. Using statistics and stereology theory, study was carried out on the quantitative relationships between light transmittance and stereological parameters in three-dimensional Euclidean space. It is found that the transmittance of Nd:YAG with 1 mm in thickness is about 45% and 58% in visible and near-infrared wavelength, respectively. The transmittance linearly increases with increasing equivalent sphere diameter and reaches the theoretical value of single crystal when the equivalent sphere diameter is 20μm. The transmittance decreases with the increasing of mean specific area per unit volume of grain and discrete grains, and the transmittance decreases with increasing mean free distance of grains in Nd:YAG ceramics.
Key words:neodymium doped yttrium aluminum garnet; transparent ceramics; stereology; microstructure; rare earths;
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