【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。更多还原

【Abstract】 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.更多还原