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A Novel Method for the Uniform Incorporation of Grain-Boundary Layer Modifiers in Positive Temperature Coefficient of Resistivity Barium Titanate

Ravi, V and Kutty, TRN (1992) A Novel Method for the Uniform Incorporation of Grain-Boundary Layer Modifiers in Positive Temperature Coefficient of Resistivity Barium Titanate. In: Journal of the American Ceramic Society, 75 (1). pp. 203-205.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1151-...

Abstract

The presently developed two-stage process involves diping the prefired porous disks of n-BaTiO3 in nonaqueous solutions containing Al-buty rate, Ti-isopropoxide, and tetraethyl silicate and subsequent sintering. This leads to uniform distribution of the grain-boundary layer (GBL) modifiers (Al2O3+ TiO2+ SiO2) and better control of the grain size as well as the positive temperature coefficient of resistivity characteristics. The technique is particularly suited for GBL modifiers in low concentrations (< 1%).

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley & Sons.
Keywords: Positive temperature coefficient of resistivity;barium titanate;grain boundary;layers;processing.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 28 Jan 2011 05:16
Last Modified: 28 Jan 2011 05:16
URI: http://eprints.iisc.ernet.in/id/eprint/35079

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