纯锌蒸发规律研究  

EVAPORATION LAWS OF ZINC IN VACUUM

作　　者：夏丹葵[1] 戴永年[1] 

机构地区：[1]昆明工学院,昆明650093

出　　处：《有色金属》1992年第4期52-55,73,共5页Nonferrous Metals

基　　金：云南省科学基金

摘　　要：本文用蒸气压法研究了纯锌在真空中蒸发的基本规律。实验证实在锌的蒸发过程中存在临界压强,即在实验的残压低于此压力值时,锌的蒸发速率将不再随着残压的进一步降低而继续增加。实验得到了临界压强与温度的关系式,并作了进一步的讨论,认为临界压强不仅与所研究的物质的物理性质有关,而且也和所研究的物质的化学性质有关。因此,按照气体分子运动论导出的各种计算临界压强式在应用中有很大的局限性。实验还得到了锌蒸发速率与温度关系的数学模型。The basic evaporation laws of zinc in vacuum are studied.It is confirmed that the critical vapor pressure of zinc certainly exists in the process of evaporation, that is, zinc evaporation rate will not rise with the reduction of residual vapour pressure as it is below the critical vapour pressure. The formula below shows the relationship between the critical vapour pressure and temperature:logp=-519/T+2.81, Pa, 773—973Kwhich is obtained by linear regression according to experimental data. Many different for...

关 键 词：锌 蒸发规律 数学模型 

分 类 号：TD862[矿业工程—金属矿开采] TF80[矿业工程—矿山开采]