Effects of Technique Parameters on Gelating Process of Cordierite Ceramics Derived from SoI-Microemulsion-Gel Method
Nano-Cordierite powders used for high frequency chip inductors (MLCIs) were prepared by the sol-emulsion-gel method.The samples derived from these powders could be sintered at 900℃ to be cordierite ceramics having a low dielectric constant and dielectric loss (ε=3.18,tgδ=0.00011; 1GHz).Effects of precursor concentration,treating temperature,and H2O/Si ratio of this material were studied.The pseudo-temary phase diagram of sol/TritonX-100/n-hexanol/cyclohexane was constructed and the influences of each variable on the phase diagram were discussed.Results showed that the optimal precursor concentration,treating temperature,and H2O/Si ratio for qualifying the gelation of the material were 1.5 mol/L,45℃,and 4,respectively.Results also showed that for qualifying cordierite powders,the use of TritonX-100 as a surfactant together with n-hexanol as a co-surfactant could dissolve more magnesium nitrate and aluminium nitrate,and obtain a wider W/O micro-emulsion region than when other reagents were used.The samples derived from this method can be co-fired with a silver electrode,an ideal dielectric material for high frequency MLCIs.
Sol-Micromulsion-Gel Method Cordierite ceramics Technique Parameters
Shaohong Wang Haoran Lu Zhaoxia Hou Changlei Niu Zhaolu Xue HaoWang Cai Wang
Key Laboratory of Advanced Functional Materials of Shenyang,Shenyang University,Shenyang 110044,Chin State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Enginee
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
1119-1123
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）