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Aqueous Processing of AlN Powder

机译:AlN粉的水处理

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摘要

For the production of ceramics containing AlN as a major or minor constituent it is necessary to avoid hydrolysis. To do that, non-aqueous powder processing is required or water-resistant AlN powders must be used. Alternatively, as in the Hydrolysis Assisted Solidification (HAS) process, which exploits the hydrolysis of the AlN for the solidification of the ceramic suspensions, the hydrolysis has to be prevented at room temperature but initiated at elevated temperatures. In this work a systematic study of AlN powder reactivity in water and other aqueous environments is presented. The AlN hydrolysis was investigated by measuring the pH of diluted suspensions and by analysis of the reaction products. The results indicate possible solutions for control of the reaction with water in order to exploit it or to prevent it to enable aqueous AlN powder processing.
机译:为了生产包含AlN作为主要或次要成分的陶瓷,必须避免水解。为此,需要非水粉末加工或必须使用耐水的AlN粉末。替代地,如在水解辅助固化(HAS)工艺中(其利用AlN的水解以使陶瓷悬浮液固化)一样,必须在室温下防止水解,但是在升高的温度下引发水解。在这项工作中,提出了对AlN粉末在水和其他水性环境中反应性的系统研究。通过测量稀释的悬浮液的pH值和分析反应产物来研究AlN水解。结果表明可能的解决方案,以控制与水的反应,以利用它或防止其使水性AlN粉末加工成为可能。

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