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Structural and dielectric characterization of Ba4Nd2Ti4+xTa6−xO30−x/2 nonstoichiometric ceramics

Published online by Cambridge University Press:  31 January 2011

X. M. Chen ,
X. H. Zheng  and
J. Wang
X. M. Chen
Affiliation:
Institute of Materials Physics & Engineering, Zhejiang University, Hangzhou 310027, China
X. H. Zheng
Affiliation:
Institute of Materials Physics & Engineering, Zhejiang University, Hangzhou 310027, China
J. Wang
Affiliation:
Institute of Materials Physics & Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract

Ba4Nd2Ti4Ta6O30 dielectric ceramics with high-Ε and low dielectric loss were modified to improve the temperature coefficient of dielectric constant. Through partial substitution of Ti4+ for Ta5+, a significantly reduced temperature coefficient of dielectric constant (tΕ = –664p pm/°C) combined with a dielectric constant above 110 and a low dielectric loss (tanδ–0.0005 to 0.0006 at 1 MHz) resulted in the nonstoichiometric dielectric ceramics with nominal compositions Ba4Nd2Ti4+xTa6-xO30?x/2 (x = 0.8–1.2).

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Articles
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Journal of Materials Research , Volume 16 , Issue 10 , October 2001 , pp. 2859 - 2863
Copyright
Copyright © Materials Research Society 2001

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