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Aluminum oxynitride AlON transparent ceramics have the advantages of high transmittance in the visible-mid infrared band, excellent mechanical strength, and good thermal shock resistance, and are preferred materials for high-temperature windows and infrared fairings, as compared with single crystal materials such as sapphire. , AlON transparent ceramic production costs lower, easy to prepare large-size special-shaped devices, the preparation of high-quality AlON transparent ceramics is increasingly important.
Under the National Fund Research Fundamental Research Plan and the 100-person Plan of the Chinese Academy of Sciences, the Zhou Youfu Research Group of the Key Laboratory of Optoelectronic Materials Chemistry and Physics of the Chinese Academy of Sciences, Institute of Materials Structure, Chinese Academy of Sciences adopts domestically-produced raw materials to optimize direct nitridation, resulting in lower costs. High-purity and high-sintering AlON ultrafine powders were synthesized, and the AlON ceramic wafers (diameter 53mm) fired by ball milling, molding, and pressureless sintering, etc., had an in-line transmittance of 77.1 nm at 400 nm and 1100 nm, respectively. % and 80.6%. The above work has been published in the ceramic journal (J. Eur. Ceram. Soc., 2015, 35, 1173-1178) and applied for Chinese invention patents.
The achievement is to develop AlON transparent ceramic optical components with larger size and complex shape, and to provide work foundation for the practicalization and engineering of AlON transparent ceramics.
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