| Ni3Ga中间相结构缺陷的热力学和统计热力学分析 |
| |
| 引用本文： | 袁文霞,O.Semenova,H.Ipser,乔芝郁.Ni3Ga中间相结构缺陷的热力学和统计热力学分析[J].北京科技大学学报,2000,22(3):202-204. |
| |
| 作者姓名： | 袁文霞 O.Semenova H.Ipser 乔芝郁 |
| |
| 作者单位： | 1. 北京科技大学冶金学院，北京100083
2. Universitat Wien, Institut fur Anorganische Chemie, Wahringerstasse 42, A-1090 Wien, Austria |
| |
| 基金项目： | 国家科学基金;29871005; |
| |
| 摘 要： | 使用以稳定的ＺｒＯ２为电解质的高温固体电解质是民池电动势方法测量了Ｎｉ３Ｃａ非整比金属间化合物１０７３至１２７３Ｋ均相范围内Ｃａ的活度，计算了偏摩尔焓和偏摩尔熵等热力学性质，考虑４种点缺陷，即分别在２个亚晶格上的反结构原子和空位共存于该ＬＩ２型化合物中，各缺陷生成自由能为可调参数：Ｅｒ（Ａ＾Ｂ）＝０．６０ｅＶ，Ｅｒ（Ｂ＾ａ）＝０．６０ｅＶ，Ｅｒ＾Ｖ（ａ）＝１．５ｅＶ，Ｅｒ＾Ｖ（Ｂ）＝２．０ｅＶ，用
|
| 关 键 词： | 金属间化合物 结构缺陷 统计热力学 Ni3Ga |
| 修稿时间： | 2000年1月1日 |
Thermodynamics and Statistical -Thermodynamics of the Ni3Ga Intermetallic Compound |
| |
| YUAN Wenxia,O.Semenova,H.Ipser,QIAO Zhiyu.Thermodynamics and Statistical -Thermodynamics of the Ni3Ga Intermetallic Compound[J].Journal of University of Science and Technology Beijing,2000,22(3):202-204. |
| |
| Authors: | YUAN Wenxia OSemenova HIpser QIAO Zhiyu |
| |
| Abstract: | Thermodynamic activities of gallium were measured between 1073 and 1 273 K in the nonstoichiometric intermetallic compound Ni3Ga using an emf-method based on solid oxygen-conducting electrolytes. The partial molar enthalpies and entropies were derived from their dependence on temperature. The results of the activity measurements were interpreted in terms of a statistical-thermodynamic model for nonstoichiometric phases with the cubic Ll2-superstructure considering four types of point defects, i. e- antistructure atoms and vacancies on the nickel- and gallium-sublattice. The enerpies of formation of the point defects at the stoichiometric composition are used as adjustable parameter. |
| |
| Keywords: | EMF measurements intermetallic compound Ni-Ga system defect chemistry |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
