Effect of Mg-doping on pyrolysis evolution and phase constitutes of Ba0.7Sr0.3TiO3 (BST) system derived from sol-gel
Gels and powders of dielectric Ba0.7Sr0.3(Ti1-xMgx)O3 (BST) were prepared by sol-gel technique. Effect of Mg-doping of on the pyrolysis evolution and phase constitutes of BSTs was investigated using DSC-TG and XRD. Results show that Mg-doping leads to a remarkable change of crystallizing process of BSTs from a double phase-transformation of non-doping sample into a single phase-transformation and quickens the crystallizing reaction of formation of BST perovskite. The maximum Mg-doping level should be less than x= 0.15 in Ba0.7Sr0.3 (Ti1-xMgx)O3 system. The amount of (Ba,Sr)CO3 phase in the BST powders increases considerably with the Mg-doping level, indicating Mg atoms should occupy the A positions of ABO3 structure of BST, instead of the B position.
Hengcheng LIAO Qichang WU Liang XU
School of Materials Science and Engineering,Southeast University,Nanjing 211189,China Jiangsu Key Laboratory for Advanced Metallic materials,Nanjing 211189,China
国际会议
The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)
湖南湘潭
英文
1-5
2009-10-23（万方平台首次上网日期，不代表论文的发表时间）