Preparation of Nano BaTiO3-Based Dielectric Ceramics by Different Sintering Methods
Microstructure control in thin-layer multilayer ceramic capacitors (MLCCs) is one of the nowadays challenges for increasing capacitive volumetric efficiency and high voltage dielectric properties.In this paper,the ultrafine-grained BaTiO3 dielectric ceramics with uniform grain size distribution were prepared by chemical coating approach.The doping effects of rare-earth element (Ho) on the microstructures and dielectric properties of the ceramics were investigated.The addition of Ho in nano BaTiO3-based ceramics was found to improve the temperature coefficient of capacitance (TCC) performance,which could be attributed to a significant reduction in the grain size.Moreover,the effects of two-step sintering (TSS) method on the microstructures and dielectric properties,compared with conventional sintering (CS) method,were also discussed.The dielectric constant of ceramics sintered by the TSS method was higher than that of ceramics prepared by CS method.The results reveal that the adoption of TSS method could control the grain size and suppress the abnormal grain growth more effectively,which improves the TCC characteristics.
BaTiO3 MLCCs Microstructure Dielectric properties
Huiling Gong Xiaohui Wang Jinyong Kim Zhibin Tian Guofeng Yao Longtu Li
State Key Lab of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Ts General Research Institute for Nonferrous Metals,R&D Center for Vehicle Battery and Energy Storage,B
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1136-1141
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）