On The Defect Structure of Ta[sub 2]O[sub 5]

Abstract

The defect structure of has been studied by measurements of the electrical conductivity and the weight change of as a function of the partial pressure of oxygen. exhibits p‐type conductivity at pressures close to 1 atm oxygen and n‐type conductivity at lower oxygen pressures. The defect structure is interpreted in terms of interstitial oxygen ions (p‐type) and oxygen vacancies (n‐type). has been found to have a small homogeneity range. The heat of formation of oxygen vacancies is .