Bulletin of Materials Science

, Volume 20, Issue 7, pp 1023–1028 | Cite as

Thermal expansion studies on ferroelectric materials

  • M V Radhika Rao
  • A M Umarji
Rapid Communication


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.


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


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Copyright information

© The Indian Academy of Sciences 1997

Authors and Affiliations

  • M V Radhika Rao
    • 1
  • A M Umarji
    • 1
  1. 1.Materials Research CentreIndian Institute of ScienceBangaloreIndia

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