Structural disorder in BZN-based pyrochlores

Yun Liu; Ray L. Withers; T. R. Welberry; Hong Wang; Hui Ling Du; Xi Yao

doi:10.1007/s10832-007-9226-z

Structural disorder in BZN-based pyrochlores

Yun Liu^*, Ray L. Withers, T. R. Welberry, Hong Wang, Hui Ling Du, Xi Yao

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

Careful structural investigations have been carried out on the Bi _1.5ZnNb_1.5O₇ based dielectric system (of A ₂ B ₂O₇ pyrochlore structure type) in an attempt to understand the origin and tolerance of relaxor behavior in such materials. A highly structured, characteristic diffuse intensity distribution was observed in electron diffraction patterns, which arises from static disordering caused by local short range ordering of Bi and Zn ions on the pyrochlore A sites and associated structural relaxation of the O'A ₂ sub-structure. This structural disordering is not affected by B site substitution of the Nb⁵⁺ ions by Sn⁴⁺ or Ti⁴⁺ ions. The result is of significance for optimizing the dielectric properties of bismuth-based advanced ceramics.

Original language	English
Pages (from-to)	401-404
Number of pages	4
Journal	Journal of Electroceramics
Volume	21
Issue number	1-4 SPEC. ISS.
DOIs	https://doi.org/10.1007/s10832-007-9226-z
Publication status	Published - Dec 2008

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title = "Structural disorder in BZN-based pyrochlores",

abstract = "Careful structural investigations have been carried out on the Bi 1.5ZnNb1.5O7 based dielectric system (of A 2 B 2O7 pyrochlore structure type) in an attempt to understand the origin and tolerance of relaxor behavior in such materials. A highly structured, characteristic diffuse intensity distribution was observed in electron diffraction patterns, which arises from static disordering caused by local short range ordering of Bi and Zn ions on the pyrochlore A sites and associated structural relaxation of the O'A 2 sub-structure. This structural disordering is not affected by B site substitution of the Nb5+ ions by Sn4+ or Ti4+ ions. The result is of significance for optimizing the dielectric properties of bismuth-based advanced ceramics.",

keywords = "BiZnNbO, Disorder, Monte Carlo, Relaxation",

author = "Yun Liu and Withers, {Ray L.} and Welberry, {T. R.} and Hong Wang and Du, {Hui Ling} and Xi Yao",

year = "2008",

month = dec,

doi = "10.1007/s10832-007-9226-z",

language = "English",

volume = "21",

pages = "401--404",

journal = "Journal of Electroceramics",

issn = "1385-3449",

publisher = "Springer Netherlands",

number = "1-4 SPEC. ISS.",

}

TY - JOUR

T1 - Structural disorder in BZN-based pyrochlores

AU - Liu, Yun

AU - Withers, Ray L.

AU - Welberry, T. R.

AU - Wang, Hong

AU - Du, Hui Ling

AU - Yao, Xi

PY - 2008/12

Y1 - 2008/12

N2 - Careful structural investigations have been carried out on the Bi 1.5ZnNb1.5O7 based dielectric system (of A 2 B 2O7 pyrochlore structure type) in an attempt to understand the origin and tolerance of relaxor behavior in such materials. A highly structured, characteristic diffuse intensity distribution was observed in electron diffraction patterns, which arises from static disordering caused by local short range ordering of Bi and Zn ions on the pyrochlore A sites and associated structural relaxation of the O'A 2 sub-structure. This structural disordering is not affected by B site substitution of the Nb5+ ions by Sn4+ or Ti4+ ions. The result is of significance for optimizing the dielectric properties of bismuth-based advanced ceramics.

AB - Careful structural investigations have been carried out on the Bi 1.5ZnNb1.5O7 based dielectric system (of A 2 B 2O7 pyrochlore structure type) in an attempt to understand the origin and tolerance of relaxor behavior in such materials. A highly structured, characteristic diffuse intensity distribution was observed in electron diffraction patterns, which arises from static disordering caused by local short range ordering of Bi and Zn ions on the pyrochlore A sites and associated structural relaxation of the O'A 2 sub-structure. This structural disordering is not affected by B site substitution of the Nb5+ ions by Sn4+ or Ti4+ ions. The result is of significance for optimizing the dielectric properties of bismuth-based advanced ceramics.

KW - BiZnNbO

KW - Disorder

KW - Monte Carlo

KW - Relaxation

UR - http://www.scopus.com/inward/record.url?scp=67651097725&partnerID=8YFLogxK

U2 - 10.1007/s10832-007-9226-z

DO - 10.1007/s10832-007-9226-z

M3 - Article

SN - 1385-3449

VL - 21

SP - 401

EP - 404

JO - Journal of Electroceramics

JF - Journal of Electroceramics

IS - 1-4 SPEC. ISS.

ER -

Structural disorder in BZN-based pyrochlores

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