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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Dielectric properties of Mg-doped Ba_(0.6)Sr_(0.4)TiO_3 ceramics prepared by using sol–gel derived powders
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Dielectric properties of Mg-doped Ba_(0.6)Sr_(0.4)TiO_3 ceramics prepared by using sol–gel derived powders

机译:溶胶-凝胶法制得的Mg掺杂Ba_(0.6)Sr_(0.4)TiO_3陶瓷的介电性能

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摘要

Structural and dielectric properties of yMgO–(1-y)Ba_(0.60)Sr_(0.40)TiO_3 (BST) (where y = 3, 5, 10, 20, 30 and 40 mol%) ceramics prepared by using sol–gel derived powders have been investigated. It is found that a careful control of the synthesis process enables producing a pure perovskite BST phase at a relatively low calcining temperature of 600 ℃. Two phases, corresponding to BST and MgO phases, are clearly visible when MgO content up to 20 mol%. The influence of MgO additive on dielectric properties of BST ceramics can be classified into two categories: one is the substitution effect of Mg~(2+) ions and the other is the “composite” effect of MgO.
机译:yMgO–(1-y)Ba_(0.60)Sr_(0.40)TiO_3(BST)(其中y = 3、5、10、20、30和40 mol%)的结构和介电性能粉末已被调查。发现对合成过程的仔细控制可以在相对较低的600℃煅烧温度下生产纯钙钛矿BST相。当MgO含量高达20mol%时,对应于BST和MgO相的两相清晰可见。 MgO添加剂对BST陶瓷介电性能的影响可分为两类:一类是Mg〜(2+)离子的取代效应,另一类是MgO的“复合”效应。

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