Characterization of ferroelectric and superconducting ceramics prepared from precursor carbonates

Pandey, D. ; Tiwari, V. S. ; Singh, A. K. ; Chaudhry, Sangeeta (1989) Characterization of ferroelectric and superconducting ceramics prepared from precursor carbonates Bulletin of Materials Science, 12 (3-4). pp. 245-261. ISSN 0250-4707

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Official URL: http://www.springerlink.com/content/324554xr734491...

Related URL: http://dx.doi.org/10.1007/BF02747135

Abstract

The advantages of a new semi-wet method for the synthesis of (Ba, Ca)TiO3 and YBa2Cu3O7-y powders from precursor carbonates are described. The precursor carbonates are prepared using chemical coprecipitation technique under controlled pH conditions to ensure uniform distribution of Ba+2/Ca+2 and Y+3/Ba+2 ions. It is shown that the powders synthesized by this route possess better chemical homogeneity as compared to those obtained by the conventional ceramic technique involving calcination of a mixture of BaCO3, CaCO3, TiO2 and Y2O3, BaCO3, CuO powders. The behaviour of the ferroelectric (Ba, Ca)TiO3 and the superconducting YBa2Cu3O7-y ceramics prepared from powders obtained by our method are found to be markedly different from those known for the conventionally prepared ceramics.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Ferroelectric Ceramics; Superconducting Ceramics; Diffuse Phase Transition; Ceramic Powder Processing; Coherent Domain Size; Line Profile Analysis
ID Code:88772
Deposited On:29 Mar 2012 14:37
Last Modified:19 May 2016 03:32

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