SiO2表面包覆改性钛酸钡/聚酰亚胺复合薄膜的制备  

Preparation of BaTiO3/Polyimide Composite Film Modified by SiO2 Surface Coating

作　　者：杨源 朱志斌[1] 初蕾[1] 王玮[1] 孙峰[1] 丛兴运 YANG Yuan;ZHU Zhibin;CHU Lei;WANG Wei;SUN Feng;CONG Xingyun(School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China)

机构地区：[1]中国海洋大学材料科学与工程学院,青岛266100

出　　处：《硅酸盐通报》2020年第4期1314-1318,1342,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51572247);中国海洋大学2019年度院系本科教学工程项目(2019JY160)。

摘　　要：通过溶胶凝胶法在BaTiO3纳米粉体表面包覆了一层SiO2壳层,在此基础上利用原位聚合法成功制备了SiO2包覆的钛酸钡(BT)/聚酰亚胺(PI)复合薄膜。SiO2通过范德华力等物理作用在BaTiO3表面形成了4 nm左右的SiO2壳层。SEM测试和介电性能测试表明,10%SiO2@BT/PI具有较好的界面相容性和介电性能。在1 kHz下,复合薄膜介电常数为4.50,介电损耗达到0.148。热学性能测试表明,复合薄膜在500℃下具有良好的热稳定性。A layer of SiO2 was coated on the surface of BaTiO3 nanometer powder by sol-gel method.On this basis,SiO2@BT/PI composite film was successfully prepared by in-situ polymerization method.About 4 nm SiO2 shell was formed on BaTiO3 surface through Van Der Waals force and other physical actions.SEM test and dielectric property test show that 10%SiO2@BT/PI has better interface compatibility and dielectric property.At 1 kHz,the dielectric constant of the composite film is 4.50,and the dielectric loss is 0.148.The thermal performance test shows that the composite film has good thermal stability at 500℃.

关 键 词：钛酸钡 二氧化硅 复合薄膜 介电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]