• N T Padal

      Articles written in Bulletin of Materials Science

    • Studies on compensating valency substituted BaTi(1-𝑥)Mn𝑥/2Nb𝑥/2O3 ceramics

      S R Kokare S A Pawar N T Padal P B Joshi

      More Details Abstract Fulltext PDF

      The paper reports investigations of relative permittivity, 𝜀𝑟, electrical conductivity, 𝜎, saturation polarization, 𝑃𝑠, infrared absorption and structural properties of compensating valency substituted BaTiO3. The compositions investigated are BaTi(1-𝑥)Mn𝑥/2Nb𝑥/2O3 for 𝑥 = 0.00; 0.025; 0.05; 0.1; 0.2; 0.4. The compositions for 𝑥 < 0.1 are observed to be ferroelectric and the transition temperature and value of 𝜀𝑟 are observed to decrease as concentration of substitution is increased. The dielectric investigations are carried out on two sets of samples

      as sintered and

      annealed.

      Annealing is observed to improve quality factor `𝑄' of the materials with a consequent reduction in the 𝜀𝑟. The observations on 𝜀𝑟 and saturation polarization suggest that additional material engineering efforts are required to improve the material properties.

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