Microstructure and dielectric tunable properties of SrO(Sr_{1鈭?span style='font-style: italic'>x}Ba_xTiO₃)_n microwave ceramics

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• 作者：Jiangying Wang ; ^{wjyliu@163.com} ; Huang Zhou ; Jintao Liu ; Shengyong Jin ; Lina Sun ; Jingji Zhang
• 关键词：Layered perovskite structure ; Tunability ; Microwave properties
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：May, 2012
• 卷：38
• 期：4
• 页码：3503-3507
• 文件大小：799 K

摘要

Microstructure and dielectric tunable properties of SrO(Sr_1鈭?em>xBa_xTiO₃)_n (x = 0 and 0.5, n = 1-4) microwave ceramics prepared through solid-state reactions have been investigated. For SrO(SrTiO₃)_n series, Sr₂TiO₄ can be isolated as single phase in n = 1 product and Sr₄Ti₃O₁₀ appears in the n 鈮?#xA0;2 cases as either a major phase (n = 3, 4) or a second phase (n = 2). Ba²⁺ substitution for Sr²⁺ causes the formation of SrTiO₃ and Ba_xSr_{2 鈭?#xA0;x}TiO₄. SrO(Sr_1鈭?em>xBa_xTiO₃)_n (n = 1, 2) have no dielectric non-linear behavior in the temperature range of 鈭?65 to 50 掳C. As n increases, the tunability increases. As a result, Ba²⁺ substitution for Sr²⁺ results in an increase in permittivity and tunability, but a decrease in Q value.