Journal
OPTICAL MATERIALS
Volume 35, Issue 12, Pages 2405-2410Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2013.06.042
Keywords
Nd:YAG transparent ceramics; Optical properties; Hot isostatic pressing; Annealing; Microstructure
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Funding
- National Natural Science Foundation of the People's Republic of China [50872083, 51002098]
- Doctoral Program of Higher Education [20090181120092]
- National High Technology Research and Development Program (863)
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The Nd:YAG transparent ceramics were fabricated by vacuum sintering. The Nd:YAG samples were annealed at 1450 degrees C for 20 h in air and followed by hot isostatic pressing (HIP) at 1700 degrees C for 2 h in 200 MPa Ar and then re-annealed at 1250-1450 degrees C for 10 h in air. The experimental results showed that the optical properties of Nd:YAG samples varied markedly with different post treatments. After air annealing at 1450 degrees C for 20 h and HIP at 1700 degrees C for 2 h under 200 MPa of Ar and then air re-annealing at 1250 C for 10 h, the transmittances of the samples increased from 51.2% to 77.2% (at 400 nm) and 78.4% to 83.6% (at 1064 nm), respectively. The annealing and HIP are effective post treatments to reduce oxygen vacancies and intergranular pores respectively in Nd:YAG transparent ceramics. (C) 2013 Elsevier B.V. All rights reserved.
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