流延工艺对生瓷带结构和微波特性的影响

基于低温共烧陶瓷技术流延工艺的特点，通过研究粘合剂、分散剂和增塑剂等在浆料体系中的力学效应对生瓷带中陶瓷成分颗粒的几何排列及所产生的孔隙排斥等力学特性的影响，以及优化热处理温度对生瓷带的质量损失、延展率和拉伸强度的关系，深入分析了流延过程的关键技术及工艺参数对生瓷带结构和微波特性的影响。研究后提出:通过调整流延浆化浆料中粘合剂、分散剂和增塑剂配比，采用梯度缓变的热处理烘干温度曲线和消除生瓷带累积应力等方法，可明显改善流延工艺过程，最终获得质量稳定、可靠性高和功能满足于微波应用要求的生瓷带。

Effect of Tape Casting Procedure on Structure and Microwave Characteristics of Tapes

In this paper, the influence on the mechanical properties of green tape from binder, dispersant and plasticizer in the slurry system is studied based on the characteristics of tape casting process in the low temperature co-fired ceramic (LTCC) technology. Also, the relationships between the heat-treatment temperature and the mass loss, as well as the elongation and tensile strength of the tape are analyzed. Moreover, the effects on structure and microwave characteristics of the green tape generated from the key procedures and technical parameters of tape casting process are discussed. The results show that the tape casting process can be significantly improved and the green tapes with stable quality and high reliability are obtained by adjusting the ratio of binder, dispersant and plasticizer, and using the gradient temperature profile and the method of eliminating cumulative stress, respectively. Finally, by the verification of the experimental microwave capacitors, the green tapes with high stability, performance and reliability are obtained, which can be suitable for the requirements in microwave applications.