Effect of Ca substitution on phase compositions and dielectric properties of Bi2O3-ZnO-Nb2O5 pyrochlore ceramics

Li Xia Pang; Di Zhou; Hong Wang

doi:10.1016/j.ceramint.2012.10.159

Effect of Ca substitution on phase compositions and dielectric properties of Bi₂O₃-ZnO-Nb₂O₅ pyrochlore ceramics

Li Xia Pang
, Di Zhou
, Hong Wang

Faculty of Electronic and Information Engineering

Xi'an Technological University
Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The phase evolution, microstructure and dielectric properties in the Ca²⁺ substituted Bi₂O₃-ZnO-Nb₂O ₅ system were studied. The crystalline phases of the [Bi _1.8(Ca_xZn_1-x)_0.2](Zn _0.6Nb_1.4)O₇ pyrochlores (0.0≤x≤1.0) depend greatly on the ratio of ionic radius A/B. With the Ca²⁺ substitution for Zn²⁺ in the A site, the crystalline phase transformed from cubic to monoclinic and pure monoclinic phase was obtained for x≥0.5. As the x value increased from 0.5 to 1.0, the permittivity in the microwave range decreased from 76.4 to 75.0, the quality factor Qf value increased from 1800 to 4700 GHz, and the TCF value shifted from -99 to -147 ppm/°C.

Original language	English
Pages (from-to)	S673-S676
Journal	Ceramics International
Volume	39
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.ceramint.2012.10.159
State	Published - May 2013

Keywords

A. Sintering
C. Dielectric properties
E. Capacitors

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10.1016/j.ceramint.2012.10.159

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@article{7949f09d11f7468fbd3fb565fa3ef0a9,

title = "Effect of Ca substitution on phase compositions and dielectric properties of Bi2O3-ZnO-Nb2O5 pyrochlore ceramics",

abstract = "The phase evolution, microstructure and dielectric properties in the Ca2+ substituted Bi2O3-ZnO-Nb2O 5 system were studied. The crystalline phases of the [Bi 1.8(CaxZn1-x)0.2](Zn 0.6Nb1.4)O7 pyrochlores (0.0≤x≤1.0) depend greatly on the ratio of ionic radius A/B. With the Ca2+ substitution for Zn2+ in the A site, the crystalline phase transformed from cubic to monoclinic and pure monoclinic phase was obtained for x≥0.5. As the x value increased from 0.5 to 1.0, the permittivity in the microwave range decreased from 76.4 to 75.0, the quality factor Qf value increased from 1800 to 4700 GHz, and the TCF value shifted from -99 to -147 ppm/°C.",

keywords = "A. Sintering, C. Dielectric properties, E. Capacitors",

author = "Pang, \{Li Xia\} and Di Zhou and Hong Wang",

year = "2013",

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language = "英语",

volume = "39",

pages = "S673--S676",

journal = "Ceramics International",

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}

TY - JOUR

T1 - Effect of Ca substitution on phase compositions and dielectric properties of Bi2O3-ZnO-Nb2O5 pyrochlore ceramics

AU - Pang, Li Xia

AU - Zhou, Di

AU - Wang, Hong

PY - 2013/5

Y1 - 2013/5

N2 - The phase evolution, microstructure and dielectric properties in the Ca2+ substituted Bi2O3-ZnO-Nb2O 5 system were studied. The crystalline phases of the [Bi 1.8(CaxZn1-x)0.2](Zn 0.6Nb1.4)O7 pyrochlores (0.0≤x≤1.0) depend greatly on the ratio of ionic radius A/B. With the Ca2+ substitution for Zn2+ in the A site, the crystalline phase transformed from cubic to monoclinic and pure monoclinic phase was obtained for x≥0.5. As the x value increased from 0.5 to 1.0, the permittivity in the microwave range decreased from 76.4 to 75.0, the quality factor Qf value increased from 1800 to 4700 GHz, and the TCF value shifted from -99 to -147 ppm/°C.

AB - The phase evolution, microstructure and dielectric properties in the Ca2+ substituted Bi2O3-ZnO-Nb2O 5 system were studied. The crystalline phases of the [Bi 1.8(CaxZn1-x)0.2](Zn 0.6Nb1.4)O7 pyrochlores (0.0≤x≤1.0) depend greatly on the ratio of ionic radius A/B. With the Ca2+ substitution for Zn2+ in the A site, the crystalline phase transformed from cubic to monoclinic and pure monoclinic phase was obtained for x≥0.5. As the x value increased from 0.5 to 1.0, the permittivity in the microwave range decreased from 76.4 to 75.0, the quality factor Qf value increased from 1800 to 4700 GHz, and the TCF value shifted from -99 to -147 ppm/°C.

KW - A. Sintering

KW - C. Dielectric properties

KW - E. Capacitors

UR - https://www.scopus.com/pages/publications/84875701948

U2 - 10.1016/j.ceramint.2012.10.159

DO - 10.1016/j.ceramint.2012.10.159

M3 - 文章

AN - SCOPUS:84875701948

SN - 0272-8842

VL - 39

SP - S673-S676

JO - Ceramics International

JF - Ceramics International

IS - SUPPL.1

ER -

Effect of Ca substitution on phase compositions and dielectric properties of Bi₂O₃-ZnO-Nb₂O₅ pyrochlore ceramics

Abstract

Keywords

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