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- Title
Transparent Nd:YAG Ceramics Fabricated Using Nanosized γ-Alumina and Yttria Powders.
- Authors
Xiaodong Li; Ji-Guang Li; Zhimeng Xiu; Di Huo; Xudong Sun
- Abstract
Neodymium (Nd):Y3Al5O12 (YAG) ceramics of excellent transparency have been fabricated by solid-reactive sintering, using nanosized γ-Al2O3 and Y2O3 powders as the starting materials. Reaction sequences and sintering behaviors of the powder mixture were characterized by X-ray diffractometry and dilatometry. One feature of the solid reactions involving γ-Al2O3 is the occurrence of hexagonal YAlO3, which is unstable and transforms to perovskite YAlO3 (YAP) upon further heating. Because of the high reactivities of the starting nanopowders, a complete conversion of the powder mixture to YAG has been achieved by heating at 1300°C for 4 h, via Y4Al2O9, hexagonal YAlO3, and YAP phases. In-line transmittances of the 1.5 at.% Nd:YAG ceramics (doped with 0.5 wt% of tetraethyl orthosilicate) at 700 nm are 81.0% and 65.7% after vacuum sintering at 1700° and 1600°C for 5 h, respectively.
- Subjects
CERAMICS; CERAMIC materials; NEODYMIUM glass lasers; ND-YAG lasers; POWDER metallurgy; X-ray diffractometers; ALUMINUM oxide; NANOCRYSTALS
- Publication
Journal of the American Ceramic Society, 2009, Vol 92, Issue 1, p241
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2008.02830.x