# Thermal Expansion Studies in Lead Iron Niobate - Lead Zinc Niobate and Related Systems

Rao, Radhika MV and Umarji, AM (1995) Thermal Expansion Studies in Lead Iron Niobate - Lead Zinc Niobate and Related Systems. In: Materials Research Bulletin, 30 (8). pp. 1031-1038.

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## Abstract

Dielectric and thermal expansion studies have been carried out in the relaxor ferroelectric system of $PFN_{1-X}-PZN_X$. These compositions show two distinct regions of thermal expansion behaviour from room temperature to 800 K. As the $T_c$ of the system increases, the lower expansion region extends. At higher values of X (> 0.7), the pyrochlore phase appears, resulting in higher values of \alpha. Addition of $BaTiO_3$ suppresses the pyrochlore phase and reduces the magnitude of \alpha in the relaxor region. The width of the low expansion region is also reduced due to the lowering of $T_c$ in these compositions.

Item Type: Journal Article Copyright of this article belongs to Elsevier. relaxor ferroelectrics;low thermal expansion;lead iron niobate;lead zinc niobate;barium titanate Division of Chemical Sciences > Materials Research Centre 03 Jul 2008 19 Sep 2010 04:46 http://eprints.iisc.ernet.in/id/eprint/14594