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    • Thermal expansion studies on ferroelectric materials

      M V Radhika Rao A M Umarji

      Rapid Communication Volume 20 Issue 7 October 1997 pp 1023-1028

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      https://www.ias.ac.in/article/fulltext/boms/020/07/1023-1028

    • Keywords

       

      Thermal expansion; ferroelectrics; relaxors; BaTiO3; Pb(Fe1/2Nb1/2)O3; electric polarization

    • Abstract

       

      Thermal expansion data is reported over a wide temperature range (80–800 K) for BaTiO3 (BT) and Pb(Fe1/2 Nb1/2)O3 (PFN), belonging to different classes of the ferroelectric materials. The sharp structural phase transitions of BT result in lowering of the thermal expansion coefficient (α) at the transitions which is proportional to the change in polarization at the transitions. In PFN, a relaxor ferroelectric, lowering of α is spread over a wider temperature range across the dielectric maxima.

    • Author Affiliations

       

      M V Radhika Rao1 A M Umarji1

      1. Materials Research Centre, Indian Institute of Science, Bangalore - 560 012, India

    • Dates

       
      Published
      October 1997

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