Chakraborty, N and Chakrabarti, J and Dasgupta, A and Basu, Debabrata (2004) Synthesis and characterization of Ca1-xSrxZr4(PO4)6 (0 less equal x less than 1) tape of NZP based low expansion ceramics. Transactions of the Indian Ceramic Society, 63 (1). pp. 33-38. ISSN 0371-750X

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Abstract

Different low thermal expansion ceramics of Ca1-xSrxZr4(PO4)6 system with x = 0, 0.25, 0.5 and 0.75 were synthesized by the solid state reaction method. After several heat treatments finished products were obtained at 1300¢XC. These were characterized for phase purity by X-ray Diffractometry and IR Spectroscopy. Densification parameters of the compositions with 3 and 5 wt% ZnO added as sintering aids were studied at 1100¢X, 1200¢X and 1300¢XC under soaking periods of 2-6 h. The corresponding effects on the physical, thermal and mechanical properties were observed. A maximum of 98% of theoretical density was obtained and flexural strength as high as 70 MPa was achieved. Thermal expansion varied from ¡V0.47 to 2.65 ¡Ñ 10¡V6/¢XC with increase in Sr content. The results are discussed in the light of the microstructures.

Item Type:	Article
Subjects:	Microstructure and Characterization
Divisions:	UNSPECIFIED
Depositing User:	Subhra Lahiri
Date Deposited:	27 Jan 2012 12:59
Last Modified:	17 Apr 2015 07:15
URI:	http://cgcri.csircentral.net/id/eprint/549

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