Abstract

Electrical conductivity σ of liquid Te and its dilute alloys containing Co, Cr, Au and Ag has been measured up to 1500°C and up to 1100 bar. The measured temperature coefficient of σ at constant pressure, (∂ ln σ/∂ T ) p , is positive and large near the melting temperature, decreases with increasing temperature and becomes negative above 850°C. On the other hand, the estimated temperature coefficient of σ at constant volume, (∂ ln σ/∂ T ) V , remains positive even at high temperature. These and other features of the temperature and pressure dependences of σ for liquid Te are discussed in connection with the ionic structure. The change in σ with addition of transition and noble metals to liquid Te is also discussed on the basis of the concept of d-resonant scattering and sp-d hybridization.

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