典型文献
Principal element design of pyrochlore-fluorite dual-phase medium-and high-entropy ceramics
文献摘要：
1.Introduction
Rare earth zirconate(RE2Zr2O7,RE=La-Lu,Y or Sc)is a kind of significantly important structural or functional ceramic[1,2].It possesses extensive application in numerous fields,such as in thermal barrier coatings(TBCs)[3-5],high-level radioactive wastes[6-8],etc.,due to the excellent thermal stability,low thermal con-ductivity and low oxygen ion diffusivity.The phase structure of conventional rare earth zirconate is strongly linked with the ionic radius ratio of RE3+to Zr4+[7,9].The latest reported articles point out that the limiting ratios of the various type of the crystal struc-tures are as follows:disordered fluorite phase＜1.21＜rhombo-hedral δ-phase＜1.42-1.44＜ordered pyrochlore phase＜1.78-1.83＜monoclinic pyrochlore phase＜1.92[10,11].However,it is demonstrated that doping trivalent cation with a large differ-ence in ionic size results in the formation of dual-phase structure.Ren et al.[9]found that both La2Zr2O7-rich pyrochlore phase and Yb2Zr2O7-rich fluorite phase generated in the LaYbZr2O7 ceramic.Guo et al.[12]further confirmed that there existed pyrochlore and fluorite dual-phase in(Nd0.9Sc0.1)2Zr2O7 ceramic.In addition,the investigation on the La2O3-ZrO2-Yb2O3 ternary phase diagram ver-ified that there were areas where the pyrochlore and fluorite co-existed[13].Furthermore,these pyrochlore-fluorite dual-phase ce-ramics show superior thermophysical and mechanical properties to their single-phase counterparts[9,14,15].
文献关键词：
中图分类号：
作者姓名：
Wei Fan;Yu Bai;Yanfen Liu;Taotao Li;Binmao Li;Lei Zhang;Chenmin Gao;Shiyu Shan;Haocen Han
作者机构：
School of Energy and Power Engineering,North University of China,Taiyuan 030051,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China;School of Mechanical Engineering,North University of China,Taiyuan 030051,China
文献出处：
引用格式：
[1]Wei Fan;Yu Bai;Yanfen Liu;Taotao Li;Binmao Li;Lei Zhang;Chenmin Gao;Shiyu Shan;Haocen Han-.Principal element design of pyrochlore-fluorite dual-phase medium-and high-entropy ceramics)[J].材料科学技术（英文版）,2022(12):149-154
A类：
Rare,RE2Zr2O7,RE3+to,rhombo,hedral,Yb2Zr2O7,LaYbZr2O7,9Sc0,ramics
B类：
Principal,element,design,pyrochlore,fluorite,dual,phase,medium,high,entropy,ceramics,Introduction,earth,zirconate,Lu,kind,significantly,important,structural,functional,It,possesses,extensive,application,numerous,fields,such,thermal,barrier,coatings,TBCs,level,radioactive,wastes,etc,due,excellent,stability,ductivity,oxygen,diffusivity,structure,conventional,rare,strongly,linked,ionic,radius,Zr4+,latest,reported,articles,point,out,that,limiting,ratios,various,type,crystal,tures,follows,disordered,monoclinic,However,demonstrated,doping,trivalent,large,differ,ence,size,results,formation,Ren,found,both,La2Zr2O7,rich,generated,Guo,further,confirmed,there,existed,Nd0,addition,investigation,La2O3,ZrO2,Yb2O3,ternary,diagram,ified,were,areas,where,Furthermore,these,show,superior,thermophysical,mechanical,properties,their,single,counterparts
AB值：
0.507764
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