期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 503, 期 2, 页码 525-528出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.05.048
关键词
pH values; Molar ratio; Optical properties; Nd:YAG; Transparent ceramics
资金
- 863 project [AA03Z523]
- NSFC [50990300]
- Major Basic Research Programs of Shanghai [07DJ14001]
The Nd:YAG ceramics were fabricated by vacuum sintering at 1750 degrees C for 20 h, where the raw nanopowders were synthesized by the co-precipitation method, and calcined at 1050 degrees C for 2 h. The effect of the pH values of reaction solution on the (Nd + Y):Al mole ratio of the powders was discussed here. It was found that the pH value range of 7.9-8.2 was suitable for the preparation of the Nd:YAG nanopowders. Secondary phases and pores appeared in and between the grains of Nd:YAG ceramic with the (Nd + Y):Al mole ratio of 0.576. The specimens with the (Nd + Y):Al mole ratio range of 0.598-0.603 had fine microstructures, and their transmissions were both over 80% at the near infrared wavelength. If the (Nd + Y):Al mole ratio reached 0.648, many secondary phases occurred along the grain boundaries. (C) 2010 Elsevier B.V. All rights reserved.
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