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    • M V Radhika Rao

      Articles written in Bulletin of Materials Science

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

      Thermal expansion studies on ferroelectric materials

      M V Radhika Rao A M Umarji

      More Details Abstract Fulltext PDF

      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.

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