Structure, thermal stability and electrical conductivity of BINBVOX

• The border of the Bi4V2 – xNbxO11 homogeneity range is equal to x = 0.9.
• The γ-modification is formed at 0.3 ≤ x ≤ 0.9 irrespective of the synthesis method.
• The highest conductivity is characteristic for x < 0.3 solid solutions.
• The decomposition of BINBVOX at 750 °C takes place at about lgPo2 = –12 (atm).

Materials based on BINBVOX compounds that are stable within wide concentration and temperature ranges have been synthesized. Refinement of the crystal structure of different BINBVOX modifications obtained at different temperatures and partial oxygen pressures has been carried out. The most promising solid solutions have been identified according to the linear dependence of the total electric conductivity on temperature and its independence on partial oxygen pressure.