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(Ca,Sr,Ba)TiO3-Based Dielectrics Sintered in Reducing Atmosphere

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Abstract:

The anti-reducing sintering of (Ca,Sr,Ba)TiO3-based dielectrics was achieved by the cooperating effect of Mn2+, Ca2+, Mg2+, Dy3+ and Yb3+. A small quantity of Zr4+ partly substitution for Ti4+ can improve the temperature dependence of dielectric constant. But ZrO2 will also reduce the solid solubility of BaTiO3-SrTiO3-CaTiO3 ternary system, and may cause phase separation. The separated ferroelectric phase increases the capacitance change under DC bias. Non-reducible (Ca,Sr,Ba)(Ti,Zr)O3-based dielectrics with single orthorhombic phase of perovskite structure was obtained. The dielectric and DC bias properties are: .C/C (DC bias: 1.5kV/mm) <0.05%, ε =250~300, tgδ < 0.5%.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

114-117

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.114

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Online since:

April 2007

Authors:

Zhen Ya Lu, Jian Qing Wu, Zhi Wu Chen

Keywords:

(Ca,Sr,Ba)TiO3, BME, DC Bias, Non-Reducible Dielectrics

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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