文献详情
Synthesis and characterization of Y2Ti2O7 nanoparticles from Y-Ti hydride nanocomposite at a low sintering temperature
文献类型期刊
作者Wang, Linbo[1];Liu, Tong[2];Bai, Zhonglian[3];Wang, Chenxi[4];Shen, Hailong[5]
机构
通讯作者Liu, T (reprint author), Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China.
来源信息年:2016  卷:51  期:14  页码范围:6967-6973  
期刊信息JOURNAL OF MATERIALS SCIENCE影响因子和分区  ISSN:0022-2461
增刊正刊
摘要The Y-Ti hydrides nanoparticles were prepared by hydrogen plasma-metal reaction (HPMR) method. Transmission electron microscopy (TEM) observation revealed that they were spherical in shape and ranged from 5 to 75 nm with a mean diameter of 31 nm. Each nanoparticle contained different hydride phases (YH2, YH3 and TiH1.924), and there existed dislocations to relax lattice misfit strain and minimize the interfacial energy. The hydride nanocomposite started to oxidize at 218 A degrees C during annealing in air, and the pyrochlore-type Y2Ti2O7 nanoparticles of single crystalline were fabricated successfully at a low sintering temperature of 900 A degrees C for 1 h. The Y2Ti2O7 nanoparticles of axiolitic shape had an average size of 70 nm, much smaller than the conventional Y2Ti2O7 prepared by sintering Y and Ti oxides above 1300 A degrees C. The formation of Y2Ti2O7 nanoparticles from the hydride nanocomposite at a low temperature and short reaction time can be attributed to the very short diffusion distance of Y and Ti at nanoscale, and the accelerated diffusion rate due to the strained interface of different hydride phases. The novel strategy opens a new way to prepare the nanosized pyrochlore-type oxides at a low temperature.
收录情况SCIE(WOS:000375317100035)  EI(20161802329824)  
所属部门材料科学与工程学院
DOI10.1007/s10853-016-9985-5
学科材料科学:综合
百度学术Synthesis and characterization of Y2Ti2O7 nanoparticles from Y-Ti hydride nanocomposite at a low sintering temperature
语言外文
人气指数51
浏览次数51
基金National Natural Science Foundation of China [U1560106]; Baosteel Group Corporation [U1560106]; Aeronautical Science Foundation of China [2014ZF51069]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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