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首页> 外文期刊>Key Engineering Materials >Reactivity of AlN Powder in an Aqueous Environment
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Reactivity of AlN Powder in an Aqueous Environment

机译：AlN粉末在水环境中的反应性

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The reactivity of AlN powder in an aqueous environment was studied by measuring the pH and the temperature during the hydrolysis of the powder at room and elevated temperatures. The influences of the powder concentration and the starting pH of the slurry were also investigated. The results of the measurements at room temperature show that there is an incubation time before the start of the AlN hydrolysis reactions. Once this incubation time is over the pH and the temperature of the slurry start to increase, indicating the onset of the reactions. A higher starting temperature not only speeds up the reaction of the AlN powder with water, but it also shortens the incubation time. In addition, the starting temperature influences the morphology of the reaction product. At temperatures below 60℃ the final product of the hydrolysis is crystalline Al(OH)_3, whereas at higher temperatures (above 60℃) crystalline AlOOH is formed. At very low pH values (pH = 1) the reaction of AlN powder with water is prevented, I.e. the incubation time is very long, whereas in an alkaline environment the incubation time is approximately the same as in distilled water, but the reaction is accelerated.
机译：通过在室温和升高的温度下测量粉末水解过程中的pH和温度，研究了AlN粉末在水性环境中的反应性。还研究了粉末浓度和浆料起始pH的影响。室温下的测量结果表明，在AlN水解反应开始之前有一个孵育时间。一旦温育时间超过pH，浆液的温度开始升高，表明反应开始。较高的起始温度不仅加快了AlN粉末与水的反应，而且缩短了孵育时间。另外，起始温度影响反应产物的形态。在低于60℃的温度下，水解的最终产物是晶体Al（OH）_3，而在更高的温度下（60℃以上）则形成晶体AlOOH。在非常低的pH值（pH = 1）下，可以防止AlN粉末与水反应，即孵育时间很长，而在碱性环境中，孵育时间与在蒸馏水中的孵育时间大致相同，但反应会加快。

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