Low temperature thermodynamic study of the stable and metastable phases of vanadium  

作　　者：LI XiaoBo XIE YouQing NIE YaoZhuang PENG HongJian 

机构地区：[1]College of Materials Science and Engineering, Central South University, Changsha 410083, China

出　　处：《Chinese Science Bulletin》2007年第22期3041-3046,共6页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 50471058);the Provincial Science Foundation of Hunan (Grant No. 06FJ3015);the Research Foundation of Education Bureau of Hunan Province (Grant No. 75KZ)

摘　　要：The low temperature thermodynamics of the stable phase of vanadium has been assessed by the polynomial and Debye models from the experimental data available in literature. By means of the con-strained nonlinear least squares curve fitting arithmetic,two sets of parameter values have been de-termined. Expressions of the thermodynamic functions Cp(T) and G(T)-H(298.15 K) at 0―298.15 K are presented. The low temperature thermodynamics of the metastable phase of vanadium can only be extrapolated by the Debye model. The expression of the thermodynamic function Cp(T) at 0―298.15 K is presented.The low temperature thermodynamics of the stable phase of vanadium has been assessed by the polynomial and Debye models from the experimental data available in literature. By means of the constrained nonlinear least squares curve fitting arithmetic, two sets of parameter values have been determined. Expressions of the thermodynamic functions Cp（T） and G（T）-H （298.15 K） at 0-298.15 K are presented. The low temperature thermodynamics of the metastable phase of vanadium can only be extrapolated by the Debye model. The expression of the thermodynamic function Cp（T） at 0-298.15 K is presented.

关 键 词：温度 热力学 钒 稳定状态 

分 类 号：O614.511[理学—无机化学]