中间相碳微球悬浮体的流变性及凝胶注模成型工艺的研究

无机材料学报

中间相碳微球悬浮体的流变性及凝胶注模成型工艺的研究

李飞¹; 倪红军²; 王俊¹; 孙宝德¹

1. 上海交通大学金属基复合材料国家重点实验室, 上海. 200030; 2. 南通大学机械工程学院, 南通 226007

收稿日期:2004-02-16 修回日期:2004-05-10 出版日期:2005-03-20 网络出版日期:2005-03-20

Rheological Behavior and Gelcasting of Mesocarbon Microbead Suspensions

LI Fei¹; NI Hong-Jun²; WANG Jun¹; SUN Bao-De¹

1. State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotorig University; Shanghai 200030; China; 2.School of Mechanical Engineering; Nantong University; Nantong 226007; China

Received:2004-02-16 Revised:2004-05-10 Published:2005-03-20 Online:2005-03-20

摘要/Abstract

摘要： 以Tween 80为分散剂,制备了水基中间相碳微球(MCMB)悬浮体.Zeta电位测定结果表明,当Tween 80的用量为1％(以MCMB质量分数计)时,该悬浮体的Zeta,电位绝对值可达到55mv(pH=7).进一步研究了分散剂用量和固含量对悬浮体流变学性能的影响,发现悬浮体最佳分散剂用量为1％,随固含量的增加,其粘度也逐渐增加.在此基础上,制得了固含量达到62.5wt％(53.1vol％)的悬浮体.研究了凝胶注模成型素坯及烧结体的力学性能及显微结构,并通过该工艺制备了形状复杂的碳板材料.

关键词: 流变学, 凝胶注模, 中间相碳微球, 悬浮体

Abstract: The aqueous mesocarbon microbead (MCMB) suspensions were prepared by using Tween 80 as dispersant. Zeta
potential measurements showed that the Zeta potential of MCMB suspension was 55mV (pH=7) in absolute when the amount of dispersant was 1wt% (based on
MCMB mass). The effects of dispersant amount and solid loading on the rheological behavior of MCMB suspensions were studied. It was found that
the optimum content of dispersant was 1%. As the increase of MCMB amount in the suspensions, the viscosity of MCMB suspensions increased. The MCMB
suspension with a solid loading of 62.5wt% (53.1vol%) was prepared successfully. The properties and microstructures of MCMB green bodies and
sintered bodies were measured and observed, respectively. A carbonaceous plate with complex shape was also fabricated by gelcasting process.

Key words: rheology, gelcasting, mesocarbon microbead, suspension

中图分类号:

TB32
O648

李飞,倪红军,王俊,孙宝德. 中间相碳微球悬浮体的流变性及凝胶注模成型工艺的研究[J]. 无机材料学报.

LI Fei,NI Hong-Jun,WANG Jun,SUN Bao-De. Rheological Behavior and Gelcasting of Mesocarbon Microbead Suspensions[J]. Journal of Inorganic Materials.

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