Effect of chemical element doping and sintering atmosphere on the microwave dielectric properties of barium zinc tantalates

J. S. Kim; J. W. Kim; C. I. Cheon; Y. S. Kim; S. Nahm; J. D. Byun

doi:10.1016/S0955-2219(01)00323-5

Effect of chemical element doping and sintering atmosphere on the microwave dielectric properties of barium zinc tantalates

J. S. Kim, J. W. Kim, C. I. Cheon, Y. S. Kim, S. Nahm, J. D. Byun

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

31 Citations (Scopus)

Abstract

The microwave dielectric properties, long range ordering (LRO) of Zn/Ta sites, and extra phase formation were studied in Ba(Zn_1/3 Ta_2/3)O₃ ceramics doped with 0-4 mol% BaWO₄ under varying sintering conditions. The sintering atmosphere was either air or ZnO-powder muffling. The LRO were analyzed by Rietveld refinement method using X-ray diffraction data. The Q.f values were extremely low for samples prepared under ZnO-muffling regardless of the degrees of LRO. Maximum Q.f values were 160,000-200,000 GHz at 0.5-1.5 mol% BaWO₄ doping. The extra phases formed during sintering in air and under ZnO-muffling were analyzed in detail. The air sintered specimens showed Ba₇Ta₆O₂₂ as a major extra phase accompanied by ZnO-loss; in ZnO-muffled specimens BaWO₄ was a dominant extra phase. During the ZnO-loss process point defects in the Zn/O sites could be introduced into BZT.

Original language	English
Pages (from-to)	2599-2604
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	21
Issue number	15
DOIs	https://doi.org/10.1016/S0955-2219(01)00323-5
Publication status	Published - 2001

Bibliographical note

Funding Information:
This work was supported by a grant from the Korea Research Foundation in the 1999 program year. The authors deeply appreciate the support.

Keywords

BZT
Cation ordering
Extra phase
Loss quality
ZnO-loss

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1016/S0955-2219(01)00323-5

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title = "Effect of chemical element doping and sintering atmosphere on the microwave dielectric properties of barium zinc tantalates",

abstract = "The microwave dielectric properties, long range ordering (LRO) of Zn/Ta sites, and extra phase formation were studied in Ba(Zn1/3 Ta2/3)O3 ceramics doped with 0-4 mol% BaWO4 under varying sintering conditions. The sintering atmosphere was either air or ZnO-powder muffling. The LRO were analyzed by Rietveld refinement method using X-ray diffraction data. The Q.f values were extremely low for samples prepared under ZnO-muffling regardless of the degrees of LRO. Maximum Q.f values were 160,000-200,000 GHz at 0.5-1.5 mol% BaWO4 doping. The extra phases formed during sintering in air and under ZnO-muffling were analyzed in detail. The air sintered specimens showed Ba7Ta6O22 as a major extra phase accompanied by ZnO-loss; in ZnO-muffled specimens BaWO4 was a dominant extra phase. During the ZnO-loss process point defects in the Zn/O sites could be introduced into BZT.",

keywords = "BZT, Cation ordering, Extra phase, Loss quality, ZnO-loss",

author = "Kim, {J. S.} and Kim, {J. W.} and Cheon, {C. I.} and Kim, {Y. S.} and S. Nahm and Byun, {J. D.}",

note = "Funding Information: This work was supported by a grant from the Korea Research Foundation in the 1999 program year. The authors deeply appreciate the support. ",

year = "2001",

doi = "10.1016/S0955-2219(01)00323-5",

language = "English",

volume = "21",

pages = "2599--2604",

journal = "Journal of the European Ceramic Society",

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TY - JOUR

T1 - Effect of chemical element doping and sintering atmosphere on the microwave dielectric properties of barium zinc tantalates

AU - Kim, J. S.

AU - Kim, J. W.

AU - Cheon, C. I.

AU - Kim, Y. S.

AU - Nahm, S.

AU - Byun, J. D.

N1 - Funding Information: This work was supported by a grant from the Korea Research Foundation in the 1999 program year. The authors deeply appreciate the support.

PY - 2001

Y1 - 2001

N2 - The microwave dielectric properties, long range ordering (LRO) of Zn/Ta sites, and extra phase formation were studied in Ba(Zn1/3 Ta2/3)O3 ceramics doped with 0-4 mol% BaWO4 under varying sintering conditions. The sintering atmosphere was either air or ZnO-powder muffling. The LRO were analyzed by Rietveld refinement method using X-ray diffraction data. The Q.f values were extremely low for samples prepared under ZnO-muffling regardless of the degrees of LRO. Maximum Q.f values were 160,000-200,000 GHz at 0.5-1.5 mol% BaWO4 doping. The extra phases formed during sintering in air and under ZnO-muffling were analyzed in detail. The air sintered specimens showed Ba7Ta6O22 as a major extra phase accompanied by ZnO-loss; in ZnO-muffled specimens BaWO4 was a dominant extra phase. During the ZnO-loss process point defects in the Zn/O sites could be introduced into BZT.

AB - The microwave dielectric properties, long range ordering (LRO) of Zn/Ta sites, and extra phase formation were studied in Ba(Zn1/3 Ta2/3)O3 ceramics doped with 0-4 mol% BaWO4 under varying sintering conditions. The sintering atmosphere was either air or ZnO-powder muffling. The LRO were analyzed by Rietveld refinement method using X-ray diffraction data. The Q.f values were extremely low for samples prepared under ZnO-muffling regardless of the degrees of LRO. Maximum Q.f values were 160,000-200,000 GHz at 0.5-1.5 mol% BaWO4 doping. The extra phases formed during sintering in air and under ZnO-muffling were analyzed in detail. The air sintered specimens showed Ba7Ta6O22 as a major extra phase accompanied by ZnO-loss; in ZnO-muffled specimens BaWO4 was a dominant extra phase. During the ZnO-loss process point defects in the Zn/O sites could be introduced into BZT.

KW - BZT

KW - Cation ordering

KW - Extra phase

KW - Loss quality

KW - ZnO-loss

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DO - 10.1016/S0955-2219(01)00323-5

M3 - Article

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 15

ER -

Effect of chemical element doping and sintering atmosphere on the microwave dielectric properties of barium zinc tantalates

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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