The ordering degree and thermal conductivity in the pyrochlore-type composition systems with a constant cation radius ratio

Lei Guo; Hongbo Guo; Shengkai Gong

doi:10.1016/j.matlet.2013.05.020

The ordering degree and thermal conductivity in the pyrochlore-type composition systems with a constant cation radius ratio

Lei Guo
, Hongbo Guo^*
, Shengkai Gong

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

22 Scopus citations

Abstract

A₂B₂O₆O'-type pyrochlore compounds with a constant average cation radius ratio (r(A³⁺)/r(B⁴⁺)=1.5), (Gd_1-xLn_x)₂(Zr_1-yTi _y)₂O₆O' (Ln: Nd, La), were synthesized by solid state reaction at 1600 C for 10 h. The ordering degree and thermal conductivity of the ceramics were investigated. XRD and Raman results revealed that all the ceramics exhibited pyrochlore phase but different ordering degree. Compared with B-site substitution in Gd₂Zr₂O₇, A-site substitution led to higher ordering degree and lower thermal conductivity when the value of r(A³⁺)/r(B⁴⁺) kept at a constant. The lowest thermal conductivity could be obtained by both A-site and B-site substitutions.

Original language	English
Pages (from-to)	119-121
Number of pages	3
Journal	Materials Letters
Volume	106
DOIs	https://doi.org/10.1016/j.matlet.2013.05.020
State	Published - 2013

Keywords

Cation radius ratio
Ceramics
Ordering degree
Thermal conductivity

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10.1016/j.matlet.2013.05.020

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@article{49c21b3b5bb4434da77e9f902942ee2b,

title = "The ordering degree and thermal conductivity in the pyrochlore-type composition systems with a constant cation radius ratio",

abstract = "A2B2O6O'-type pyrochlore compounds with a constant average cation radius ratio (r(A3+)/r(B4+)=1.5), (Gd1-xLnx)2(Zr1-yTi y)2O6O' (Ln: Nd, La), were synthesized by solid state reaction at 1600 C for 10 h. The ordering degree and thermal conductivity of the ceramics were investigated. XRD and Raman results revealed that all the ceramics exhibited pyrochlore phase but different ordering degree. Compared with B-site substitution in Gd2Zr2O7, A-site substitution led to higher ordering degree and lower thermal conductivity when the value of r(A3+)/r(B4+) kept at a constant. The lowest thermal conductivity could be obtained by both A-site and B-site substitutions.",

keywords = "Cation radius ratio, Ceramics, Ordering degree, Thermal conductivity",

author = "Lei Guo and Hongbo Guo and Shengkai Gong",

year = "2013",

doi = "10.1016/j.matlet.2013.05.020",

language = "英语",

volume = "106",

pages = "119--121",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - The ordering degree and thermal conductivity in the pyrochlore-type composition systems with a constant cation radius ratio

AU - Guo, Lei

AU - Guo, Hongbo

AU - Gong, Shengkai

PY - 2013

Y1 - 2013

N2 - A2B2O6O'-type pyrochlore compounds with a constant average cation radius ratio (r(A3+)/r(B4+)=1.5), (Gd1-xLnx)2(Zr1-yTi y)2O6O' (Ln: Nd, La), were synthesized by solid state reaction at 1600 C for 10 h. The ordering degree and thermal conductivity of the ceramics were investigated. XRD and Raman results revealed that all the ceramics exhibited pyrochlore phase but different ordering degree. Compared with B-site substitution in Gd2Zr2O7, A-site substitution led to higher ordering degree and lower thermal conductivity when the value of r(A3+)/r(B4+) kept at a constant. The lowest thermal conductivity could be obtained by both A-site and B-site substitutions.

AB - A2B2O6O'-type pyrochlore compounds with a constant average cation radius ratio (r(A3+)/r(B4+)=1.5), (Gd1-xLnx)2(Zr1-yTi y)2O6O' (Ln: Nd, La), were synthesized by solid state reaction at 1600 C for 10 h. The ordering degree and thermal conductivity of the ceramics were investigated. XRD and Raman results revealed that all the ceramics exhibited pyrochlore phase but different ordering degree. Compared with B-site substitution in Gd2Zr2O7, A-site substitution led to higher ordering degree and lower thermal conductivity when the value of r(A3+)/r(B4+) kept at a constant. The lowest thermal conductivity could be obtained by both A-site and B-site substitutions.

KW - Cation radius ratio

KW - Ceramics

KW - Ordering degree

KW - Thermal conductivity

UR - https://www.scopus.com/pages/publications/84878344308

U2 - 10.1016/j.matlet.2013.05.020

DO - 10.1016/j.matlet.2013.05.020

M3 - 文章

AN - SCOPUS:84878344308

SN - 0167-577X

VL - 106

SP - 119

EP - 121

JO - Materials Letters

JF - Materials Letters

ER -

The ordering degree and thermal conductivity in the pyrochlore-type composition systems with a constant cation radius ratio

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Keywords

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