Thermodynamic Evaluation of Gadolinium  

作　　者：沈化森 张维敬 刘国权 王润 杜振民 

出　　处：《Rare Metals》1996年第1期23-34,共12页稀有金属（英文版）

摘　　要：Based on the analysis and evaluation of the thermodynamic information (including heat capacity, enthalpy, entropy, relative magnetic parameter, solid transition temperature, melting point, solid transition enthalpy and melting enthalpy, etc.) on all the condensed phases (hcp-, bcc-Gd and the liquid Gd), a description of the Gibbs energy of various condensed phases of gadolinium at 101325 Pa was obtained for the whole temperature range from 200 to 3600 K. The magnetic contribution to the Gibbs energy of hcp-Gd was described by using the Inden-Hillert-Jarl phenomenological model. The data of different measurable thermodynamic properties of hcp-, bcc-Gd and the liquid Gd were calculated by using the above description of the Gibbs energy, which reproduces very well with the experimental data from different sources.Based on the analysis and evaluation of the thermodynamic information (including heat capacity, enthalpy, entropy, relative magnetic parameter, solid transition temperature, melting point, solid transition enthalpy and melting enthalpy, etc.) on all the condensed phases (hcp-, bcc-Gd and the liquid Gd), a description of the Gibbs energy of various condensed phases of gadolinium at 101325 Pa was obtained for the whole temperature range from 200 to 3600 K. The magnetic contribution to the Gibbs energy of hcp-Gd was described by using the Inden-Hillert-Jarl phenomenological model. The data of different measurable thermodynamic properties of hcp-, bcc-Gd and the liquid Gd were calculated by using the above description of the Gibbs energy, which reproduces very well with the experimental data from different sources.

关 键 词：ENTHALPY ENTROPY Gibbs free energy Rare earth elements Specific heat Thermodynamic properties 

分 类 号：TG146.45[一般工业技术—材料科学与工程]