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首页> 外文期刊>Crystallography reports >Chemical processes and composition of the gas and solid phases in the Al2O3-Mo system in the temperature range 2327-2500 K
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Chemical processes and composition of the gas and solid phases in the Al2O3-Mo system in the temperature range 2327-2500 K

机译：温度范围2327-2500 K的Al2O3-Mo系统中气相和固相的化学过程和组成

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摘要

The possibility of chemical reactions has been calculated and the composition of the gas and solid phases that are in equilibrium with an aluminum oxide melt is determined. It is shown that, for the Al2O3-Mo system in the pressure range 1-1 x 10(-5) bar, evaporation of Al2O3 is incongruent, and the fraction of this component in the gas phase decreases from 51.5 mol % (P = 1 bar) to 0.01 mol % (P = 1 x 10(-5) bar). The presence of molybdenum-containing compounds in the gas phase changes the balance of oxygen and aluminum in favor of the latter (the aluminum partial pressure increases by a factor of 1.5-3), as a result of which there may be an aluminum deficit in the solid phase of Al2O3 during crystal growth from a melt. The thermodynamic characteristics (K (p) , Delta G, P (tot)) of dominant chemical reactions have been calculated for the temperature range 2327-2500 K. Understanding of the chemical processes makes it possible to optimize the growth parameters of leucosapphire single crystals.
机译：已经计算出化学反应的可能性，并且确定了与氧化铝熔体平衡的气相和固相的组成。结果表明，对于压力范围为1-1 x 10（-5）bar的Al2O3-Mo系统，Al2O3的蒸发是不相容的，并且该组分在气相中的比例从51.5 mol％（P = 1巴）至0.01摩尔％（P = 1 x 10（-5）巴）。气相中含钼化合物的存在改变了氧气和铝的平衡，有利于后者（铝分压增加了1.5-3倍），其结果可能是铝中的铝缺乏。熔体晶体生长过程中Al2O3的固相。在2327-2500 K的温度范围内，已计算出主要化学反应的热力学特征（K（p），Delta G，P（tot））。了解化学过程可以优化隐色蓝宝石单晶的生长参数。 。

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