Abstract

We have determined the adiabatic temperature of the calcium reduction of ZrO₂ and CaZrO₃ (1525 and 1040 K, respectively) and the reaction onset temperature. In a mixture of reagents under an argon atmosphere in a reactor, it is about 1123 K and is determined by the calcium melting onset. If calcium particles with CaCl₂ film on their surface are used as a reducing agent, reduction begins at a temperature of 1023 K in an argon atmosphere and at 973 K in vacuum. By reduction for 3 h at a temperature of 1023 K, we have obtained zirconium powder containing 0.36% oxygen and having a specific surface area of 0.35 m²/g.

中文翻译：

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氧化锆化合物的钙还原

摘要

我们已经确定了ZrO ₂和CaZrO ₃的钙还原反应的绝热温度（分别为1525 K和1040 K）和反应起始温度。在反应器中，在氩气气氛下，在试剂混合物中，其约为1123 K，由钙的熔化起始点确定。如果将表面具有CaCl ₂膜的钙颗粒用作还原剂，则还原反应应在氩气气氛下于1023 K的温度下在真空下于973 K的温度下开始。通过在1023K的温度下还原3小时，我们获得了含有0.36％的氧和比表面积为0.35m ² / g的锆粉。