摘要
Ｚｎ，Ｃｄ，Ｐｂ，Ｓｂ等金属的挥发速率与温度和压力的关系作了研究，结合国外的数据，归纳提出典型曲线和表达式，曲线以临界压Ｐｃｒｉｔ为界分两部分，高于Ｐｃｒｉｔ，残余气体起主要作用，金属挥发速率ω，随压力增大而减小，有ｌｏｇω＝ａ一ｂｐ残；小于Ｐｃｒｉｔ时，金属的蒸气压起决定作用，ω在一定温度时为定值，此规律对实践有重要意义，如确定作业的真空度，温度，加大设备生产率，不污染环境，在真空中不氧化金属，不使金属溶解气体，还可以脱除金属中的气体等。
The relationships of evaporation rate(ω)of Zn,Cd,Pb,Sb with temperature and pressure werestudied.Referins to a great deal of foreign data,typical curve and equations arc suggested.Thc curve is divided into two parts by critical pressure Pcrit.When the pressure of chamber P is larger than Pcrit residualgas plays an important role,logω=a bPresidure. And when P < Pcrit, vapor pressure of metals makes decisiverole and ω,is a constant at certain temperaturc.The results of the study are of practical usc for determining vacuum degree and temperature of a process,increasins the productivity of the equipment.dgasingthe metals with no pollution to enviroment,no oxidization to metal.and no gas solution in metal.
基金
云南省应用基础研究基金支持项目
关键词
真空度
挥发性
挥发速率
金属
vacuum degree, evaporation
evaporation rate of metal
