Mechanochemical changes of Weinschenkite-type RPO sub 4 ter dot 2H sub 2 O (R = DY, Y, Er, or YB) by grinding the thermal reactions of the ground specimens
- Dept. of Materials Science and Engineering, Nagoya Inst. of Technology, Gokiso, Showa-ku, Nagoya 466 (JP)
- Faculty of Engineering, Kokushikan Univ., Setagaya, Tokyo 154 (JP)
The melting temperatures of monazite- and xenotime-type RPO{sub 4} (R = rare-earth elements) are about 2000{degrees} C or higher in air. These properties may make the rare-earth orthophosphates attractive new materials for high-temperature applications. There have been few systematic studies on the preparation conditions and thermal changes of the rare-earth orthophosphates. This paper, discusses the mechanochemical changes of weinschenkite-type RPO{sub 4} {center dot} 2H{sub 2}O (R = Dy, Y, Er, or Yb) at room temperature and the thermal reactions of the new rhabdophane-type YPO{sub 4} {center dot} 0.8H{sub 2}O and ErPO{sub 4} {center dot} 0.9H{sub 2}O at temperatures ranging from room temperature to 1800{degrees} C in air.
- OSTI ID:
- 5159204
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 72:6; ISSN JACTA; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601 -- Other Materials-- Preparation & Manufacture
360603* -- Materials-- Properties
CHEMISTRY
COMMINUTION
DYSPROSIUM COMPOUNDS
DYSPROSIUM PHOSPHATES
ERBIUM COMPOUNDS
ERBIUM PHOSPHATES
FABRICATION
GRINDING
HIGH TEMPERATURE
HYDRATES
MACHINING
MECHANICS
MEDIUM TEMPERATURE
MELTING POINTS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY HIGH TEMPERATURE
YTTERBIUM COMPOUNDS
YTTERBIUM PHOSPHATES
YTTRIUM COMPOUNDS
YTTRIUM PHOSPHATES