典型文献
High-entropy Sm2B2O7(B=Ti,Zr,Sn,Hf,Y,Yb,Nb,and Ta)oxides with highly disordered B-site cations for ultralow thermal conductivity
文献摘要：
Materials with ultralow thermal conductivity and good thermal stability are of great interest in numer-ous applications such as energy storage and conversion devices,and thermal insulation components.In this work,a family of high-entropy Sm2B2O7(B=Ti,Zr,Sn,Hf,Y,Yb,Nb,and Ta)oxides with highly disordered cations on the B-site has been synthesized by introducing large atomic-size mismatch,mass and charge disorder.Through tuning the composition,the high-entropy Sm2B2O7 oxides can be engi-neered from pyrochlore to fluorite structure,accompanied with an order-disorder transition.The py-rochlore Sm2(Nb0.2Sn0.2Ti0.2Y0.2Zr0.2)2O7 and fluorite Sm2(Nb0.2Ta0.2Y0.2Yb0.2Zr0.2)2O7 exhibit low thermal conductivities of 1.35 W·m-1·K-11 and 1.23 W·m-1·K-1,respectively,indicating their good thermal insu-lation.In addition,the high-entropy fluorite Sm2(Nb0.2Ta0.2Y0.2Yb0.2Zr0.2)2O7 also shows average thermal expansion coefficient of 10.2×10-6℃-1 and high-temperature stability even after thermal exposure at 1600℃in air for 30 h.These results indicate that the high-entropy Sm2B2O7(B=Ti,Zr,Sn,Hf,Y,Yb,Nb,and Ta)can be promising candidates for thermal barrier coatings and thermally insulators.
文献关键词：
中图分类号：
作者姓名：
Liang Xu;Lei Su;Hongjie Wang;Hongfei Gao;Pengfei Guo;Min Niu;Kang Peng;Lei Zhuang;Zhiwei Dai
作者机构：
State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China
文献出处：
引用格式：
[1]Liang Xu;Lei Su;Hongjie Wang;Hongfei Gao;Pengfei Guo;Min Niu;Kang Peng;Lei Zhuang;Zhiwei Dai-.High-entropy Sm2B2O7(B=Ti,Zr,Sn,Hf,Y,Yb,Nb,and Ta)oxides with highly disordered B-site cations for ultralow thermal conductivity)[J].材料科学技术（英文版）,2022(24):182-189
A类：
Sm2B2O7,rochlore,2Sn0
B类：
High,entropy,Hf,oxides,highly,disordered,site,ultralow,conductivity,Materials,good,stability,are,great,interest,numer,ous,applications,such,energy,storage,conversion,devices,insulation,components,In,this,work,family,has,been,synthesized,by,introducing,large,atomic,mismatch,mass,charge,Through,tuning,composition,engi,neered,from,pyrochlore,fluorite,structure,accompanied,transition,Nb0,2Ti0,2Y0,2Zr0,2Ta0,2Yb0,exhibit,conductivities,respectively,indicating,their,addition,also,shows,average,expansion,coefficient,temperature,even,after,exposure,air,These,results,indicate,that,promising,candidates,barrier,coatings,thermally,insulators
AB值：
0.431021
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
