【摘要】 为制备固相含量高、适合流延工艺的氧化铝陶瓷悬浮体,并保证成型坯片具有良好的强韧性能,通过分析陶瓷悬浮体的粘度、Zeta电位、接触角等参数,研究了各种添加剂对凝胶流延工艺的影响.实验结果表明:分散剂可提高悬浮体的Zeta电位,从而提高固相体积含量;增塑剂可明显提高坯片的柔韧性;表面活性剂可大幅度降低悬浮体与基带的接触角(从93°降低到72 2°).成功制备出固相含量超过50%的悬浮体,成型后的坯片表面平整,强度高,柔韧性好.更多还原

【Abstract】 To acquire slurry with high solid content and green body with high strength and flexibility, the influences of various additives on the process of gel-tape-casting were studied by detecting the viscosity, Zeta potential and contact angle of slurry. It is shown that dispersant improves the Zeta potential of alumina powder, consequently enhances the solid content of slurry; plasticizer increases the flexibility of green body obviously; surfactant can reduce the contact angle of slurry on the carrier film (from 93° to 72.2°). Defoamer is efficient to eliminate foams in slurry resulted from the introduction of surfactant. The slurry with more than 50% solid content was prepared, and a green tape with high strength, flexibility and smooth surface was obtained.更多还原