共 27 条
Effect of sintering temperature on the microstructure and electrical properties of zirconium doped barium titanate ceramics
被引:46
作者:

Mahesh, M. L. V.
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h-index: 0
机构:
Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India

Prasad, V. V. Bhanu
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h-index: 0
机构:
Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India

James, A. R.
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h-index: 0
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Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India
机构:
[1] Def Met Res Lab, Ceram & Composites Grp, Hyderabad 500058, Andhra Pradesh, India
关键词:
DIELECTRIC-PROPERTIES;
GRAIN-SIZE;
TRANSITION;
LA;
D O I:
10.1007/s10854-013-1460-3
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
Lead-free Ba(Zr0.15Ti0.85)O-3 (BZT15) ceramics were synthesized by adopting the solid-state synthesis method. The effect of increasing sintering temperature (T-s) in the range of 1,350-1,450 A degrees C on the microstructure, dielectric, polarization, and electric field induced strain of the ceramics was studied. Fine grained (similar to 260 nm) BZT15 ceramics displayed single phase perovskite structure with relative densities > 94 % of the theoretical density. Both grain size and shape were influenced by the sintering parameters. With increase in T-s, not only the maximum dielectric constant decreased from 11,412 to 8,734 along with an increase in the degree of diffuseness, but also interestingly the Curie temperatures were found to vary within an interval of 61-73 A degrees C. Optimum sintering temperature has been found resulting in high remnant polarisation and strain in these ceramics. The properties observed are attributed to a contribution from all polar vectors present in coexistent phases.
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页码:4684 / 4692
页数:9
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