Effect of Dispersant Content on Nanograined BME MLCC Powder Prepared by Aqueous Chemical Coating Method
Dispersion plays an important role in aqueous chemical coating process for the preparation of BaTiO3 based next generation BME MLCC powder,since it affects coating coverage and layer morphology of the BaTiO3 particles as well as the microstructure and dielectric properties of the ceramics.In this paper,poly (acrylic acid-co-maleic acid) (PAM) is used as dispersant,its content influences are carefully investigated.It is known that low content of dispersant leads to not only poor dispersion,low coverage and irregular coating layer of BaTiO3 particles,but also bad temperature coefficient of capacitances and inhomogeneous microstructure of the resultant BaTiO3 ceramics,while excessive dispersant deteriorates the microstructure and performance by reducing the density of ceramic.With proper dispersant content,the particles are dispersed and coated perfectly,finally the dense X7R-satisfied ceramic are obtained with average grain size 103nm and fine microstructure,meeting the requirement of next generation MLCCs.
Dispersant content Aqueous chemical coating Dielectric materials X7R
Yichi Zhang Xiaohui Wang Kim-Jinyong Longtu Li
State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084 China
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
153-157
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）