运用在氮气流中測定蒸发速率的方法,研究了SnO-SiO_2系統中氧化亚錫的揮发性能。实驗証明:在一定条件下,氧化亚錫的蒸发速率的对数值与溫度、熔体成分之間存在着簡单的比例关系。根据实驗数据計算出SnO-SiO_2系中SnO和SiO_2的活度值。它們在所研究的熔体成份范围內对理想溶液有明显的負偏差。 根据实驗結果,推測了負偏差产生的原因,指出在所研究的成分范围內可能不存在SnO与SiO_2之間的化合物。
Rates of volatilization of SnO from the binary silicate melts containing 60.60 to 91.00 wt.-% SnO were measured by the "Loss Weight" method. It was found that the logarithm of volatilization rate or vapour pressure of SnO is proportional to the composition of the melt. From these experimental results the activities of SnO and SiO_2 were calculated, and it occurred that they exhibit considerable negative deviation from Raoult's Law. Since the rate of volatilization varies exponentially with the SnO content in the binary melt, it is unlikely that this deviation is associated with the formation of compound between. SnO and SiO_2.
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