【作者】 姚云； 徐利华； 连芳； 夏雯；

【Author】 Yao Yun Xu Lihua Lian Fang Xia WenDepartment of Inorganic Materials, University ofScience and Technology Beijing,Beijing, 100083

【机构】 北京科技大学无机非金属材料系；

【摘要】 本文以SL型聚合(高分子)电解质作为分散剂,以石墨结合高岭土。以及石墨结合飞灰为对象,研究了分散剂对胶态稳定性的影响。结果表明该分散剂能使碳容易在水中溶解并使溶液的黏度快速降低,同样在高岭土-水系统中也发现类似的现象。通过对粒度分布的分析,所测试的粉体均具有多峰行为,它有利于颗粒微观内力作用下的颗粒紧密堆积。因此,基于低黏度与高固相含量的控制,可获得具有高密度的精细复合坯体,其包括高岭土-石墨以及飞灰-石墨-高岭土。在胶态成形工艺中,其混合粉体的组分配比、分散剂含量、各种粉体的粒度分布以及固相质量分数等,对流变行为、力学性能以及生态环境均能产生直接的影响。更多还原

【Abstract】 This paper selected skip liquid (SL) polyelectrolyte as dispersant , kaolin powders containing graphite and fly ash powders containing graphite as object, and investigated the effects of dispersant on the colloidal stabilization. The results indicated the dispersant enabled carbon to solve easily in water resulting in a rapid decrease of viscosity, and the similar trend was found in kaolin-water system. Through the analysis of particle size distribution, multi-peak behaviors in the tested powders were available for the formation of close-packed particulates under inter-particle forces. Therefore, the fine composite compact of kaolin/graphite and fly ash/kaolin/graphite with high green density can be obtained based on the control of low viscosity and high solid concentration. In colloidal process, there are many factors governing directly the rheological, mechanical properties and ecological environment, which involve primarily composition of mixture powders, binder amount, particle size distribution of each powder and the total of solid weight fraction etc.更多还原