Effect of Mg-doping on pyrolysis evolution and phase constitutes of Ba0.7Sr0.3TiO3 (BST) system derived from sol-gel

机译：镁掺杂对溶胶-凝胶Ba0.7Sr0.3TiO3（BST）体系热解演化和相组成的影响

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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.

机译：采用溶胶凝胶法制备了介电Ba0.7Sr0.3（Ti1-xMgx）O3（BST）的凝胶和粉末。用DSC-TG和XRD研究了Mg掺杂对BSTs热解过程和相组成的影响。结果表明，Mg掺杂导致BST的结晶过程发生显着变化，从非掺杂样品的双相转变为单相转变，并加快了BST钙钛矿形成的结晶反应。在Ba0.7Sr0.3（Ti1-xMgx）O3系统中，最大Mg掺杂水平应小于x = 0.15。 BST粉末中（Ba，Sr）CO3相的含量随Mg掺杂量的增加而显着增加，表明Mg原子应占据BST的ABO3结构的A位置，而不是B位置。

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《8th China international nanoscience and technology symposium》|2009年|p.1-5|共5页
会议地点 Xiangtan(CN);Xiangtan(CN)
作者
Hengcheng LIAO; Qichang WU; Liang XU;
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School of Materials Science and Engineering,Southeast University,Nanjing 211189,China Jiangsu Key Laboratory for Advanced Metallic materials,Nanjing 211189,China;

School of Materials Science and Engineering,Southeast University,Nanjing 211189,China Jiangsu Key Laboratory for Advanced Metallic materials,Nanjing 211189,China;

School of Materials Science and Engineering,Southeast University,Nanjing 211189,China Jiangsu Key Laboratory for Advanced Metallic materials,Nanjing 211189,China;

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Effect of Mg-doping on pyrolysis evolution and phase constitutes of Ba0.7Sr0.3TiO3 (BST) system derived from sol-gel

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