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Original Articles

Compositionally Graded BST Ceramics Prepared by Tape Casting

, , , , &
Pages 125-132 | Received 16 Jul 2008, Accepted 24 Jul 2008, Published online: 20 Sep 2010
 

Abstract

Graded ferroelectric ceramics based on barium strontium titanate solid solutions Ba 1 − x Sr x TiO 3 (x = 0–0.3) was prepared by tape casting. Its microstructure and dielectric properties were investigated. A significant change of grain sizes was observed in the graded samples, decreasing with the increase of strontium concentration. The samples demonstrated high temperature stability of dielectric characteristics. In the ceramics with x varying from 0 to 0.3 the temperature coefficient of capacitance (TCC) did not exceed 10% in the range T = 20–100°C.

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