Y3+- 和 Ce4+- 共掺锆酸镧热胶体的超低玻璃样热导率,可用于潜在的热障涂层应用

IF 5.8 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of The European Ceramic Society Pub Date : 2024-10-30 DOI:10.1016/j.jeurceramsoc.2024.117038
Yanfei Wang , Weiran Zhang , Jinping Du, Duan Li, Rongjun Liu
{"title":"Y3+- 和 Ce4+- 共掺锆酸镧热胶体的超低玻璃样热导率,可用于潜在的热障涂层应用","authors":"Yanfei Wang ,&nbsp;Weiran Zhang ,&nbsp;Jinping Du,&nbsp;Duan Li,&nbsp;Rongjun Liu","doi":"10.1016/j.jeurceramsoc.2024.117038","DOIUrl":null,"url":null,"abstract":"<div><div>It is urgent to develop thermal barrier coating (TBC) topcoat materials with ultra-low thermal conductivities for next-generation gas turbine engines. A novel pyrochlore-based single-phased ceramic, tuned by codoping of lanthanum zirconate, (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub>, has been synthesized from the solid state reaction method. The thermal conductivity of (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub> not only exhibits a temperature-independent trend but also reaches as low as 0.93 W·m<sup>−1</sup>·K<sup>−1</sup>, a value that is lowest of fully dense crystalline solids in open literature, attributing to the following two combined effects. The first is the strong scattering of phonons by small-sized Y<sup>3+</sup> cations occupying the oversized atomic cages formed by the distinctive pyrochlore structure. The second is the lattice softening effects arising from larger-sized Ce<sup>4+</sup> substituting Zr<sup>4+</sup> cations. The above two effects act in concert and thus form a glasslike and ultra-low thermal conductivity of (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub> solid solutions, which is ideal for next-generation TBC topcoat applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 3","pages":"Article 117038"},"PeriodicalIF":5.8000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The ultra-low glasslike thermal conductivities of Y3+- and Ce4+- codoped lanthanum zirconate pyrochlores for potential thermal barrier coating applications\",\"authors\":\"Yanfei Wang ,&nbsp;Weiran Zhang ,&nbsp;Jinping Du,&nbsp;Duan Li,&nbsp;Rongjun Liu\",\"doi\":\"10.1016/j.jeurceramsoc.2024.117038\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>It is urgent to develop thermal barrier coating (TBC) topcoat materials with ultra-low thermal conductivities for next-generation gas turbine engines. A novel pyrochlore-based single-phased ceramic, tuned by codoping of lanthanum zirconate, (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub>, has been synthesized from the solid state reaction method. The thermal conductivity of (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub> not only exhibits a temperature-independent trend but also reaches as low as 0.93 W·m<sup>−1</sup>·K<sup>−1</sup>, a value that is lowest of fully dense crystalline solids in open literature, attributing to the following two combined effects. The first is the strong scattering of phonons by small-sized Y<sup>3+</sup> cations occupying the oversized atomic cages formed by the distinctive pyrochlore structure. The second is the lattice softening effects arising from larger-sized Ce<sup>4+</sup> substituting Zr<sup>4+</sup> cations. The above two effects act in concert and thus form a glasslike and ultra-low thermal conductivity of (La<sub>1-x</sub>Y<sub>x</sub>)<sub>2</sub>(Zr<sub>1-y</sub>Ce<sub>y</sub>)<sub>2</sub>O<sub>7</sub> solid solutions, which is ideal for next-generation TBC topcoat applications.</div></div>\",\"PeriodicalId\":17408,\"journal\":{\"name\":\"Journal of The European Ceramic Society\",\"volume\":\"45 3\",\"pages\":\"Article 117038\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The European Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0955221924009117\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The European Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955221924009117","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0

摘要

为下一代燃气涡轮发动机开发导热系数超低的热障涂层(TBC)面层材料迫在眉睫。通过固态反应方法合成了一种新型的基于吡咯啉的单相陶瓷--锆酸镧共掺物 (La1-xYx)2(Zr1-yCey)2O7。(La1-xYx)2(Zr1-yCey)2O7的热导率不仅呈现出与温度无关的趋势,而且低至0.93 W-m-1-K-1,是公开文献中全致密结晶固体的最低值,这归因于以下两种综合效应。首先,小尺寸的 Y3+ 阳离子占据了由独特的火绿宝石结构形成的超大原子笼,对声子产生了强烈的散射。其次是较大尺寸的 Ce4+ 取代 Zr4+ 阳离子所产生的晶格软化效应。上述两种效应协同作用,形成了玻璃状和超低导热率的 (La1-xYx)2(Zr1-yCey)2O7固溶体,是下一代 TBC 表层涂料应用的理想选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
The ultra-low glasslike thermal conductivities of Y3+- and Ce4+- codoped lanthanum zirconate pyrochlores for potential thermal barrier coating applications
It is urgent to develop thermal barrier coating (TBC) topcoat materials with ultra-low thermal conductivities for next-generation gas turbine engines. A novel pyrochlore-based single-phased ceramic, tuned by codoping of lanthanum zirconate, (La1-xYx)2(Zr1-yCey)2O7, has been synthesized from the solid state reaction method. The thermal conductivity of (La1-xYx)2(Zr1-yCey)2O7 not only exhibits a temperature-independent trend but also reaches as low as 0.93 W·m−1·K−1, a value that is lowest of fully dense crystalline solids in open literature, attributing to the following two combined effects. The first is the strong scattering of phonons by small-sized Y3+ cations occupying the oversized atomic cages formed by the distinctive pyrochlore structure. The second is the lattice softening effects arising from larger-sized Ce4+ substituting Zr4+ cations. The above two effects act in concert and thus form a glasslike and ultra-low thermal conductivity of (La1-xYx)2(Zr1-yCey)2O7 solid solutions, which is ideal for next-generation TBC topcoat applications.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of The European Ceramic Society
Journal of The European Ceramic Society 工程技术-材料科学:硅酸盐
CiteScore
10.70
自引率
12.30%
发文量
863
审稿时长
35 days
期刊介绍: The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.
期刊最新文献
Amorphous SiOC-coated submicron mullite aerogels with excellent thermal and structural stability up to 1500 ℃ Oxidation behavior of (Hf0.2Zr0.2Ta0.2Ti0.2Me0.2)B2 (Me=Nb,Cr) high-entropy ceramics at 1200 °C in air Properties of multiple rare earth oxides co-stabilized YDyGdSmNd-TZP ceramics HfB2-SiC ceramics fabricated by reactive melt infiltration and its long-term oxidation behavior at 1650°C Optimized electrostrain with minimal hysteresis at the MPB in BNT-based ceramics
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1