ISOTOPE DEPENDENCE OF THE EFFECTIVE VALENCE OF PROTIUM AND DEUTERIUM IN THE ALPHA-PHASE OF TANTALUM

被引：6

作者：

HASHIZUME, K

KAWABATA, Y

FUJII, K

SUGISAKI, M

机构：

[1] Department of Nuclear Engineering, Faculty of Engineering, Kyushu University, Higashi-ku, Fukuoka-shi, 812, Hakozaki

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1994年 / 215卷 / 1-2期

关键词：

D O I：

10.1016/0925-8388(94)90820-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effective valence Z* of protium and deuterium in the ct phase of Ta has been measured by means of a stationary state electromigration experiment in the temperature region from 373 K to 523 K. A definite isotope dependence Z*(H)>Z*(D) has been found. The reversal of the isotope dependence to Z*(H)<Z*(D) in the temperature region below 350 K has been suggested from the temperature dependence of Z*. The direct valence Z(d) of H and D has been evaluated by relating the temperature dependence of Z* to that of electric resistivity, leading to the values 1.7 and 0.91 respectively. We also found that the contribution of the wind valence Z(w) is negative and depends on the isotopes.

引用

页码：71 / 76

页数：6

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