钛酸锶钡纤维阵列薄膜电容器的构建及其性能

Construction and performance of barium strontium titanate fiber array film capacitor

采用溶胶-凝胶法制备钛酸锶钡(BST)溶胶前驱体,采用反应复合法和混合复合法合成纺丝液,通过静电纺丝技术制备BST复合纤维阵列,900℃煅烧制备BST无机纤维阵列。以复合纤维阵列和无机纤维阵列作为介质材料,以镀银氧化锆陶瓷片作为上下电极构建薄膜电容器。利用DTA、XRD、FT-IR、SEM等进行结构和形貌表征,利用自动元件分析仪进行介电性能测试。结果表明,无机纤维阵列介电常数最大可提高388%。复合纤维易形成颗粒堆积的“骨节”结构,但阵列的有序性变差,介电常数从7.96提高至9.19,提高了15%,介电损耗略有增大。

Barium strontium titanate(BST)sol precursor and powder particles were prepared by sol-gel method,and then the spinning solution was synthesized by reaction composite method and mixed composite method.BST composite fiber array was prepared by electrospinning technology,and BST inorganic fiber array was prepared by calcination at 900℃.The composite fiber array and inorganic fiber array were used as dielectric materials,and the silver-plated zirconia ceramic sheet was used as the upper and lower electrodes to construct a thin film capacitor.The structure and morphology of BST composite fiber array and inorganic fiber array were characterized by DAT,XRD,FT-IR,SEM.The dielectric properties of thin film capacitors were tested by automatic component analyzer.The results show that the BST inorganic fiber array’s dielectric constant can be increased by 388%at most.The BST composite fiber is easy to form the‘bone’structure of particle accumulation,but the order of the array becomes worse.The dielectric constant increases from 7.96 to 9.19,an increase of 15%,and the dielectric loss increases slightly.