Rattler effect on the properties of multicomponent rare-earth-zirconate ceramics

Runwu Yang; Jie Xu; Mingyue Wei; Jiatong Zhu; Xuanyu Meng; Ping Zhang; Jinlong Yang; Feng Gao

doi:10.1016/j.ceramint.2022.06.172

Rattler effect on the properties of multicomponent rare-earth-zirconate ceramics

Runwu Yang
, Jie Xu
, Mingyue Wei
, Jiatong Zhu
, Xuanyu Meng
, Ping Zhang
, Jinlong Yang
, Feng Gao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Tsinghua University

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

26 Scopus citations

Abstract

Rattler effect caused by size disorder in the cation sublattice of rare-earth zirconates has been proved to be an effective way for the thermal conductivity reduction. Herein, a series of multicomponent ((La_1/3Eu_1/3Gd_1/3)_1-xYb_x)₂Zr₂O₇ (x = 0, 0.25, 0.5, 0.75 and 1) ceramics were synthesized, their structures and the influence of rattler effect on thermal conductivity were investigated. The increasing Yb³⁺ doping content causes the phase transformation from pyrochlore structure to fluorite structure. The dual-phase ((La_1/3Eu_1/3Gd_1/3)_0.75Yb_0.25)₂Zr₂O₇ exhibits enhanced hardness owing to the small grain size of the dual-phase structure, which can effectively alleviate the stress to hinder deformation. Also, it has a higher coefficient of thermal expansion of 11.2 × 10⁻⁶/K (1200 °C). Since Yb³⁺ acts as active resonant scattering center, lower thermal conductivity of ((La_1/3Eu_1/3Gd_1/3)_0.75Yb_0.25)₂Zr₂O₇ and ((La_1/3Eu_1/3Gd_1/3)_0.5Yb_0.5)₂Zr₂O₇ caused by rattler effect makes them promising thermal barrier coatings.

Original language	English
Pages (from-to)	28586-28594
Number of pages	9
Journal	Ceramics International
Volume	48
Issue number	19
DOIs	https://doi.org/10.1016/j.ceramint.2022.06.172
State	Published - 1 Oct 2022

Keywords

Mechanical properties
Multicomponent compounds
Rare-earth zirconates
Rattler effect
Thermal conductivity

Access to Document

10.1016/j.ceramint.2022.06.172

Cite this

@article{92a91527e49d4794a294aeba82eec656,

title = "Rattler effect on the properties of multicomponent rare-earth-zirconate ceramics",

abstract = "Rattler effect caused by size disorder in the cation sublattice of rare-earth zirconates has been proved to be an effective way for the thermal conductivity reduction. Herein, a series of multicomponent ((La1/3Eu1/3Gd1/3)1-xYbx)2Zr2O7 (x = 0, 0.25, 0.5, 0.75 and 1) ceramics were synthesized, their structures and the influence of rattler effect on thermal conductivity were investigated. The increasing Yb3+ doping content causes the phase transformation from pyrochlore structure to fluorite structure. The dual-phase ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 exhibits enhanced hardness owing to the small grain size of the dual-phase structure, which can effectively alleviate the stress to hinder deformation. Also, it has a higher coefficient of thermal expansion of 11.2 {\texttimes} 10−6/K (1200 °C). Since Yb3+ acts as active resonant scattering center, lower thermal conductivity of ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 and ((La1/3Eu1/3Gd1/3)0.5Yb0.5)2Zr2O7 caused by rattler effect makes them promising thermal barrier coatings.",

keywords = "Mechanical properties, Multicomponent compounds, Rare-earth zirconates, Rattler effect, Thermal conductivity",

author = "Runwu Yang and Jie Xu and Mingyue Wei and Jiatong Zhu and Xuanyu Meng and Ping Zhang and Jinlong Yang and Feng Gao",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",

year = "2022",

month = oct,

day = "1",

doi = "10.1016/j.ceramint.2022.06.172",

language = "英语",

volume = "48",

pages = "28586--28594",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "19",

}

TY - JOUR

T1 - Rattler effect on the properties of multicomponent rare-earth-zirconate ceramics

AU - Yang, Runwu

AU - Xu, Jie

AU - Wei, Mingyue

AU - Zhu, Jiatong

AU - Meng, Xuanyu

AU - Zhang, Ping

AU - Yang, Jinlong

AU - Gao, Feng

PY - 2022/10/1

Y1 - 2022/10/1

N2 - Rattler effect caused by size disorder in the cation sublattice of rare-earth zirconates has been proved to be an effective way for the thermal conductivity reduction. Herein, a series of multicomponent ((La1/3Eu1/3Gd1/3)1-xYbx)2Zr2O7 (x = 0, 0.25, 0.5, 0.75 and 1) ceramics were synthesized, their structures and the influence of rattler effect on thermal conductivity were investigated. The increasing Yb3+ doping content causes the phase transformation from pyrochlore structure to fluorite structure. The dual-phase ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 exhibits enhanced hardness owing to the small grain size of the dual-phase structure, which can effectively alleviate the stress to hinder deformation. Also, it has a higher coefficient of thermal expansion of 11.2 × 10−6/K (1200 °C). Since Yb3+ acts as active resonant scattering center, lower thermal conductivity of ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 and ((La1/3Eu1/3Gd1/3)0.5Yb0.5)2Zr2O7 caused by rattler effect makes them promising thermal barrier coatings.

AB - Rattler effect caused by size disorder in the cation sublattice of rare-earth zirconates has been proved to be an effective way for the thermal conductivity reduction. Herein, a series of multicomponent ((La1/3Eu1/3Gd1/3)1-xYbx)2Zr2O7 (x = 0, 0.25, 0.5, 0.75 and 1) ceramics were synthesized, their structures and the influence of rattler effect on thermal conductivity were investigated. The increasing Yb3+ doping content causes the phase transformation from pyrochlore structure to fluorite structure. The dual-phase ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 exhibits enhanced hardness owing to the small grain size of the dual-phase structure, which can effectively alleviate the stress to hinder deformation. Also, it has a higher coefficient of thermal expansion of 11.2 × 10−6/K (1200 °C). Since Yb3+ acts as active resonant scattering center, lower thermal conductivity of ((La1/3Eu1/3Gd1/3)0.75Yb0.25)2Zr2O7 and ((La1/3Eu1/3Gd1/3)0.5Yb0.5)2Zr2O7 caused by rattler effect makes them promising thermal barrier coatings.

KW - Mechanical properties

KW - Multicomponent compounds

KW - Rare-earth zirconates

KW - Rattler effect

KW - Thermal conductivity

UR - https://www.scopus.com/pages/publications/85132934667

U2 - 10.1016/j.ceramint.2022.06.172

DO - 10.1016/j.ceramint.2022.06.172

M3 - 文章

AN - SCOPUS:85132934667

SN - 0272-8842

VL - 48

SP - 28586

EP - 28594

JO - Ceramics International

JF - Ceramics International

IS - 19

ER -

Rattler effect on the properties of multicomponent rare-earth-zirconate ceramics

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this