Microstructure and Dielectric Properties of Barium Strontium Titanate Thick Films and Ceramics With a Concrete‐Like Structure
Microstructure and Dielectric Properties of Barium Strontium Titanate Thick Films and Ceramics With a Concrete‐Like Structure
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DOI：
10.1111/j.1551-2916.2007.01742.x
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发表时间：
2007-08
影响因子：
3.9
通讯作者：
Hongfang Zhang;X. Yao;Liang-ying Zhang
中科院分区：
文献类型：
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作者：
Hongfang Zhang;X. Yao;Liang-ying Zhang
采用溶胶-凝胶法制备了具有混凝土结构的钛酸锶钡（Ba0.6Sr0.4TiO3，BST）厚膜和陶瓷。在该方法中，结晶良好的纳米尺寸或微米尺寸的BST粉末或它们的组合被分散到溶胶-凝胶基质中。在较低的烧结温度下制备了无裂纹的厚膜和致密的BST陶瓷，具有非常不均匀的类混凝土结构。研究了这种厚膜和陶瓷的介电性能。结果表明，在0 ° C，10 kHz时，厚膜的介电常数和损耗角正切分别为1209和0.016;在0 ° C，10 kHz时，体相BST陶瓷的介电常数和损耗角正切分别为5510和0.02。
Barium strontium titanate (Ba0.6Sr0.4TiO3, BST) thick films and ceramics with a concrete-like structure were fabricated by a novel sol–gel-based route. In this process, well-crystallized nano-sized or micrometer-sized BST powders or their combinations are dispersed into a sol–gel matrix. Crack-free thick films and dense BST ceramics have been fabricated at a low sintering temperature with a very inhomogeneous concrete-like structure. The dielectric properties of such thick films and ceramics have been investigated. The results show that the dielectric constant and loss tangent of the thick films are 1209 and 0.016, respectively, at 0°C, 10 kHz, and those of the bulk BST ceramics are 5510 and 0.02, respectively, at 0°C, 10 kHz.