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Citation: Gu Hao, Song Lianren, He Jingzhen. ON THE STABILITY OF YTTRIUM-ALUMINATE PEROFSKITE (YAP) CRYSTAL IN REDUCING ATMOSPHERE[J]. Chinese Journal of Applied Chemistry, ;1989, 6(4): 96-98. shu

ON THE STABILITY OF YTTRIUM-ALUMINATE PEROFSKITE (YAP) CRYSTAL IN REDUCING ATMOSPHERE

1.
1. Jiangsu College of Chemical Engineering, Changzhou;
2.
2. Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 5 July 1988
Available Online: 22 November 1988

The decomposition of blocky or powdered crystals of YAP in vacuum or under Ar atmosphere at 1650-1700℃ in graphite resistance furnace has been studied by chemical analysis, X-ray diffraction and SEM observation. The YAP crystal was unstable in above mentioned conditions owing to the reducing atmosphere produced by graphite. Al was lost by volatilization, forming aluminium bead in the cool region of the graphite crucible tray, and YAM (and Y₂0₃) remained. A lot of holes were observed on the surface of YA type crystals. It is supposed that decomposition takes place at these active sites In the similar condition YAG crystal is also unsatble as YAP. The "sweating" phenomena, may be caused just by the unstability of YAP.
- Yttrium-aluminate,
- Laser crystal,
- Stability
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