• A J Kulkarni

      Articles written in Bulletin of Materials Science

    • Pyroelectric properties of ferroelectric potassium-cesium vanadate and potassium-lithium vanadate

      A J Kulkarni A P Kashid S H Chavan

      More Details Abstract Fulltext PDF

      Measurements of pyroelectric currents and coefficients of poled sintered discs of ferroelectric solid solutions, potassium-cesium vanadate and potassium-lithium vanadate have been investigated in the temperature range covering their transition points. In these solid solutions, KxCs1−xVO3 and KxLi1−xVO3, pronounced peaks have been observed at the ferroelectric curie temperatures. The peak values of pyroelectric currents and coefficients change with change in potassium concentration in both the solid solutions.

    • Thermoelectric power of ferroelectric potassium vanadate, cesium vanadate, lithium vanadate and their solid solutions

      A J Kulkarni S P Rasal T S Magdum S H Chavan

      More Details Abstract Fulltext PDF

      The thermoelectric power of the vanadates of potassium, cesium and lithium and their solid solutions was measured in the temperature range covering their transition points. The thermoelectric power measurement was carried out by the two-electrode technique for pellets of polycrystalline ceramic samples. The thermoelectric power increased with temperature initially, then decreased attaining a zero value at the transition temperature. As the concentration of KVO3 increased the thermoelectric power decreased for the solid solutions (Kx − Cs1−x)VO3, whereas the thermoelectric power increased with increase in concentration of KVO3 for the solid solutions (Kx − Li1−x)VO3. Vanadates of potassium, cesium, and lithium and their solid solutions showedP type semiconductor behaviour in ferroelectric state andn type semiconductor behaviour in paraelectric region.

  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.