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(Ba_(0.2)Sr_(0.8))_(1-1.5y)Gd_yTi_(1-0.5x)Zn_xO_3系列陶瓷的物相、结构与晶粒尺寸的X射线衍射研究

Studies on Physical Phase,Crystal Cell Parameters and Grain Size of(Ba_(0.2)Sr_(0.8))_(1-1.5y)Gd_yTi_(1-0.5x)Zn_xO_3 Series Ceramics by X-ray Diffraction
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摘要 用X射线衍射方法,对采用固相反应方法制备的(Ba0.2Sr0.8)1-1.5yGdyTi1-0.5xZnxO3(x=0.03864,y=0,0.04,0.05,0.06)系列陶瓷样品的物相、结构和晶粒尺寸进行测量与分析,结果表明:(1)当Gd3+含量y 0.04时,(Ba0.2Sr0.8)1-1.5yGdyTi1-0.5xZnxO3的晶体结构分别属于空间群P432(207)、P23(195)的立方晶系,晶胞体积随y增加而略有减小(~0.6%);(2)当y=0.05,0.06时,晶体结构变为属于空间群P4/n(85)、P41(76)的四方晶系,晶胞体积减小量较大(~2.7%);(3)该系列样品主要是由尺寸在441~1222晶粒堆砌而成的晶相单一的陶瓷. The physical phases, crystal cell parameters and crystal grain sizes of series ceramic samples (Ba0.2Sr0.8)1-1.15yGdyTi1-0.5xZnxO3 (x=0.03864, y=0, 0.04,0.05, 0.06) prepared by solid phase reaction are measured by X-ray diffraction method. The results was following: (1) for the Gd3+ contenty _〈 0.04, the crystal structure of the (Ba0.2Sr0.8)1-1.15yGdyTi1-0.5xZnxO3samples belongs to the cubic crystal system of space group P432 (207) , P23 (195) , and the cell volume decreases slightly (-0.6%) with y; (2) for y= 0.05, 0.06, the crystal structure turns to the tetragonal system of space group P4/n ( 85 ), P41 ( 76), but the cell volume decreases a little ( - 2.7%) ; (3) To each sample is a ceramic of crystal ~rain sizes being 441-1222А and single crystal structure.
出处 《伊犁师范学院学报(自然科学版)》 2012年第2期19-22,共4页 Journal of Yili Normal University:Natural Science Edition
基金 国家自然科学基金(30860076 10774064) 自治区高技术发展项目(200916126) 新疆自治区科技厅自然基金(200821104 200821184 2009211B16)
关键词 X射线衍射 物相 晶体结构 晶粒尺寸 X-ray diffraction physical phase crystal cell parameter crystal grain size
作者简介 张海珠(1986-),女,伊犁师范学院在读研究生,主要研究方向:凝聚态光学 周恒为(1968-),女,教授,主要研究方向:凝聚态物理.
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