Scandium thermal properties

Electrical properties of thin rare earth oxide film have also been studied. The conductivity of praseodymium thin film oxide was measured as a function of temperature and oxygen pressure [9]. The oxide film was found to act as a p-type conduction at temperatures high than 630°C and was a n-type semiconductor at the temperatures of 400-630°C. Thermally evaporated EU2O3 thin film on a glass substrate is also obtained in an amorphous state. From the measurement of frequency dependence of the ac conductance, the predominant mechanism could be ascribed to the result of a hopping type. The ac conductivity measurements were also carried out for thin film of SC2O3 at temperatures between 4 and 295 K [10]. The conductivity was found to obey the relationship of ai(ffl)=Aco which depends on frequency and s is dependent on temperature and is a little lower than unity. By using a classical hop mechanism between randomly distributed localized states, a model was proposed and applied to scandium oxide with the assumption that the localized states are caused by lattice vacancies. The model is expected to be... 

Table 4.118. Properties of high-strength thermally nonstrengthened welded aluminum-scandium alloy 01570...

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