IONIC-CONDUCTION IN DILUTE PSEUDO-BINARY SYSTEMS CUBR-CU2SE

Ionic conductivity, sigma(i), of dilute pseudobinary alloys (CuBr)(1-x )(Cu2Se)(x) (x less than or equal to 0.1) in their gamma-phase has bee n measured by an ac method. The increase of the ionic conductivity pro pertional to x has been observed, which is attributed to interstitial ions brought by Cu2Se dissolved in CuBr. It is found that the temperat ure dependence of mobility of interstitial ions, mu, evaluated by the relation Delta sigma(i)/x = k mu (k is a constant) is bent at the temp erature corresponding to the extrinsic-intrinsic transition of the bas ed material CuBr. (C) 1998 Elsevier Science B.V. All rights reserved.