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Synthesis and thermal expansion hysteresis of Ca1-xSrxZr4P6O24

Angadi, Basavaraj and Jali, VM and Lagare, MT and Kini, NS and Umarji, AM (2002) Synthesis and thermal expansion hysteresis of Ca1-xSrxZr4P6O24. In: Bulletin of Materials Science, 25 (3). pp. 191-196.

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Abstract

The low thermal expansion ceramic system, Ca1-xSrxZr4P6O24, for the compositions with x = 0, 0.25, 0.50, 0.75 and 1 was synthesized by solid-state reaction. The sintering characteristics were ascertained by bulk density measurements. The fracture surface microstructure examined by scanning electron microscopy showed the average grain size of 2.47 mum for all the compositions. The thermal expansion data for these ceramic systems over the temperature range 25-800degreesC is reported. The sinterability of various solid solutions and the hysteresis in dilatometric behaviour are shown to be related to the crystallographic thermal expansion anisotropy. A steady increase in the amount of porosity and critical grain size with increase in x is suggested to explain the observed decrease in the hysteresis.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Low-thermal expansion;thermal expansion hysteresis;NZP ceramics.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 27 Jul 2011 09:46
Last Modified: 27 Jul 2011 09:46
URI: http://eprints.iisc.ernet.in/id/eprint/39443

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