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无机材料学报

无机材料学报

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亚微米A12O3浆料的流变性优化研究

刘阳桥; 高濂   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室 上海 200050
  • 收稿日期:2002-09-04 修回日期:2002-12-16 出版日期:2003-11-20 网络出版日期:2003-11-20

Optimization Study on the Rheological Behavior of Alumina Suspensions

LIU Yang-Qiao; GAO Lian   

  1. State Key Lab of High Performance Ceramics fc Superfine Microstructures; Shanghai Institute of Ceramics; Shanghai 200050; China
  • Received:2002-09-04 Revised:2002-12-16 Published:2003-11-20 Online:2003-11-20

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摘要： 研究了多种高聚物类分散剂对亚微米氧化铝浆料流变性的影响,通过优化pH值、分散剂用量等因素,使颗粒间排斥力达到最大,获得了固含量高达58vol％的适合浇注的Al2O3浆料.以该浆料为原料,采用凝胶浇注的方法成型氧化铝陶瓷,获得了显微结构极其均匀的素坯,经1600℃烧结2h,烧结体的相对密度>98％.

关键词: 氧化铝, 分散, 流变性, 凝胶浇注成型

Abstract: The influence of various polyelectrolyte dispersants on the rheological properties of sub-micron alumina suspensions was investigated. Stable 58vol% alumina suspensions suitable for casting was prepared by optimizing the factors including pH, dispersant type and amount, etc. Green compacts with homogeneous microstructures were obtained by the gel casting method. Finally, Al2O3 bodies sintered at 1600℃for 2h, with a relative dencity more then 98% were fabricated.

Key words: alumina, dispersion, rheology, gel casting

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