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- W2592552661 abstract "4.5%Y_2O_3-ZrO_2,0.6%La_2O_3-YSZ,0.8%La_2O_3-YSZ,1.2%La_2O_3-YSZ(YSZ,0.6La, 0.8La,1.2La)(molar fraction) composite ceramic nanopowders were prepared by co-precipitation method using ZrOCl_2·8H_2O,Y(NO_3)_3·6H_2O,La_2O_3 as raw materials.The synthesized powders were characterized and the phase stability was investigated.The results show that the size of 0.6La particles prepared by reverse titration method is~20 nm,and the size of particles prepared by the straight titration method is~50 nm.The agglomeration of the powder prepared by reverse titration method is also smaller than that of the powder prepared by straight titration method.After calcined at 600℃for 2 h,all of the synthesized powders showed the pure tetragonal structure;after sintered at 1200℃for 100 h,0.6La, 0.8La showed the pure tetragonal structure,the cubic phase composed of both of YSZ and 1.2La and pyrochlore structure compose of 1.2La;after sintered at 1300℃for 100 h,0.6La,0.8La,1.2La showed the tetragonal structure,the cubic phase compose of all synthesized powders and pyrochlore structure compose of 1.2La and small fraction of monoclinic phase(~1.5%) was formed of YSZ;after sintered at 1400℃for 100h,the tetragonal phase cannot keep stable,monoclinic phase compose of all the synthesized powders, the monoclinic phase content of 0.6La,0.8La,1.2La,YSZ is 30.5%,32%,35%,46.0%respectively.The phase stability of YSZ can be modified by addition small fraction of La_2O_3 at 1300℃." @default.
- W2592552661 created "2017-03-16" @default.
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- W2592552661 date "2011-02-14" @default.
- W2592552661 modified "2023-09-24" @default.
- W2592552661 title "Preparation and High Temperature Phase Stability of La2O3–Y2O3–ZrO2 Composite Ceramic Nanopowder" @default.
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