以聚乙烯醇为粘结剂,乙二醇为增塑荆,聚羧酸铵盐为分散剂,对Li1.075Nb0.625 Ti0.4sO3微波介质陶瓷的水基流延成型工艺进行了研究.在以水为溶剂的条件下,考察了分散剂、粘结剂、增塑剂对浆料粘度和稳定性的影响以及流延浆料的流变特性.结果表明,分散剂对浆料粘度的影响较大,其最佳用量为粉体的0.2%(质量分数).聚乙烯醇水溶液能增加浆料的粘度,并提高浆料的稳定性;乙二醇虽然能降低浆料的粘度,但对其稳定性的影响不大.Li1.075Nb0.625 Ti0.45O3水基流延浆料为典型的假塑性流体,并且不存在触变性;SEM观察表明,流延成型后陶瓷素坯膜的微观结构均匀.
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