Studies on compensating valency substituted BaTi(1-�?)Mn�?/2Nb�?/2O3 ceramics

[摘要] The paper reports investigations of relative permittivity, ðœ�?_ð‘�?, electrical conductivity, 𝜎, saturation polarization, ð‘�?_ð‘�?, infrared absorption and structural properties of compensating valency substituted BaTiO₃. The compositions investigated are BaTi_{(1-ð‘�?)}Mn_{ð‘�?/2}Nb_{ð‘�?/2}O₃ for ð‘�? = 0.00; 0.025; 0.05; 0.1; 0.2; 0.4. The compositions for ð‘�?< 0.1 are observed to be ferroelectric and the transition temperature and value of ðœ�?_ð‘�? are observed to decrease as concentration of substitution is increased. The dielectric investigations are carried out on two sets of samples

[学科分类] 材料工程

[关键词] Valence compensating ceramic;barium titanate;dielectric constant;electron-transport properties;saturation polarization.