Study on the interaction between a dislocation and impurities Part XIII : Groping for a suitable force-distance relation between a dislocation and the impurity in KCl single crystals doped with monovalent impurities by activation energy -temperature relation

転位と不純物との相互作用に関する研究 (13) :　1 価不純物を含んだKCl 単結晶中の転位とその不純物との力対距離関係モデルについて、活性化エネルギーと温度との関係からの模索

Study on the interaction between a dislocation and impurities Part XIII : Groping for a suitable force-distance relation between a dislocation and the impurity in KCl single crystals doped with monovalent impurities by activation energy -temperature relation

Creators Kohzuki Yohichi

An attempt to select the most suitable force-distance relation between a dislocation and the monovalent cation impurity in KCl:Li+ (LiCl 0.5 mol% in the melt) and KCl:Na+ (NaCl 0.5 mol% in the melt) was conducted among the three models: a square, a parabolic, and a triangular force-distance relations. These models are taken into account the Friedel relation. The grope for the most suitable model was carried out at 80-300 K by roportionality of ∆H(T) . The ∆H(T) is the activation　enthalpy for the interaction between a dislocation and an impurity as a function of temperature. As a　result, the square force-distance relation seemed to be the most suitable of the three for KCl:Na+.　However, it was difficult to select that for KCl:Li+. ∆H (Tc) was further obtained on the three　force-distance relations for both the 　pecimens. ∆H (Tc) corresponds to the activation enthalpy for　overcoming the strain field with cubic distortion around the substitutional impurity by a dislocation　without an applied stress.

[ISSN]0387-9232

[NCID]AN00031668