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Intensification of the Removal of Iron Impurities from Microporous Aluminum Oxide via Argon Blowing
High Temperature ( IF 1 ) Pub Date : 2020-05-13 , DOI: 10.1134/s0018151x20010162
E. I. Shkol’nikov , P. P. Ivanov

Abstract

A model is proposed for intensification of the process of high-temperature vacuum removal of iron impurities from microporous aluminum oxide via purging of the particle layer with argon. In the temperature range characteristic of this process, the pressure of saturating vapors above pure iron is on the order of 0.1 mm Hg. For an impurity with a concentration of several particles per million, the figure is proportionally smaller, and this creates problems with evacuation of the chamber. The use of argon as a carrier gas destroys the rigid connection between the partial vapor pressure of the impurity and the pressure in the vacuum chamber. Calculations show that the argon flow under moderate vacuum 10–5 mm Hg with a mass flow rate on the order of 10–7 kg/(m2 s) provides a very deep purification.


中文翻译:

通过氩吹吹强化从微孔氧化铝中去除铁杂质

摘要

提出了一种模型,用于通过用氩吹扫颗粒层来增强从微孔氧化铝中真空去除铁杂质的高温过程。在该方法的温度范围内,纯铁上方的饱和蒸气压力约为0.1 mm Hg。对于浓度为百万分之几的杂质而言,该数字成比例地变小,这会导致腔室排空。使用氩气作为载气会破坏杂质的部分蒸气压与真空室中的压力之间的刚性连接。计算表明,氩气在中等真空度10 –5 mm Hg下的质量流量为10 –7 kg /(m 2 s)提供了非常深层的净化。
更新日期:2020-05-13
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