Formation and Dielectric Properties of Mn-Doped BSTN Composite Ceramics
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2010年第1期
论文作者：王亚兰
文章页码：1 - 3
摘 要：The influence of Mn doping on the formation and dielectric properties of 0.7BaO·0.3SrO·（1-y）TiO2·yNb2O5 （BSTN） composite ceramics were investigated. The Mn was doped according to the formula 0.7BaO·0.3SrO·（0.7-z）TiO2·0.3Nb2O5·zMnO2 （BSTNM）. The results show the two phases, perovskite phase BST and the tungsten bronze phase SBN, are coexistence in BSTNM as they are in BSTN composite ceramics. The Mn ions doped in BSTN substitute for Nb5+ ions in the tungsten bronze phase, and then, the Nb5+ ions substitute for Ti4+ ions in the perovskite phase. With the increasing of Mn dopant, the content of the perovskite phase increases while that of the tungsten bronze phase decreases, and the grain size of the perovskite phase decreases. As well as, the phase transition temperature of tungsten bronze phase increases with value z increasing from 0 to about 0.05.
周宗辉
School of Materials Science and Engineering,University of Jinan
摘 要：The influence of Mn doping on the formation and dielectric properties of 0.7BaO·0.3SrO·（1-y）TiO2·yNb2O5 （BSTN） composite ceramics were investigated. The Mn was doped according to the formula 0.7BaO·0.3SrO·（0.7-z）TiO2·0.3Nb2O5·zMnO2 （BSTNM）. The results show the two phases, perovskite phase BST and the tungsten bronze phase SBN, are coexistence in BSTNM as they are in BSTN composite ceramics. The Mn ions doped in BSTN substitute for Nb5+ ions in the tungsten bronze phase, and then, the Nb5+ ions substitute for Ti4+ ions in the perovskite phase. With the increasing of Mn dopant, the content of the perovskite phase increases while that of the tungsten bronze phase decreases, and the grain size of the perovskite phase decreases. As well as, the phase transition temperature of tungsten bronze phase increases with value z increasing from 0 to about 0.05.
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