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无机材料学报

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2009 , Vol. 24 >Issue 2: 413 - 416

DOI: https://doi.org/10.3724/SP.J.1077.2009.00413

研究论文

ZnO-Al2O3混合粉体水基悬浮液性能的研究

  • 孙宜华 ,
  • 熊惟皓 ,
  • 李晨辉
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  • 华中科技大学 材料成形与模具技术国家重点实验室， 武汉 430074

收稿日期: 2008-05-24

  修回日期: 2008-07-05

  网络出版日期: 2009-03-20

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Study on Dispersion Behavior of ZnO-Al2O3 Powders Aqueous Suspension

  • SUN Yi-Hua ,
  • XIONG Wei-Hao ,
  • LI Cheng-Hui
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  • State Key of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430073, China

Received date: 2008-05-24

  Revised date: 2008-07-05

  Online published: 2009-03-20

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摘要

通过Zeta电位、粘度、沉降等测试，研究了添加剂含量、pH值、固含量和球磨时间对ZnO-Al2O3混合粉体水基悬浮液的稳定性、流动性等的影响.实验结果表明：当pH值为9左右，聚丙烯酸添加质量分数为0.20%时，悬浮液粘度最低、稳定性最好.可制得固相体积分数55%的悬浮液.聚乙二醇添加量的增加，使悬浮液粘度增大、稳定性下降.该实验条件下，球磨时间以40h为佳.

关键词： ZnO-Al2O3混合粉体; 聚丙烯酸; 聚乙二醇; 分散性能

本文引用格式

孙宜华 , 熊惟皓 , 李晨辉 . ZnO-Al2O3混合粉体水基悬浮液性能的研究[J]. 无机材料学报, 2009 , 24(2) : 413 -416 . DOI: 10.3724/SP.J.1077.2009.00413

Abstract

The stability and fluidity of ZnO-Al2O3 mixed powders suspension in aqueous solution adding with polyacrylic acid and polyethylene glycol were investigated. The Zeta potential of ZnO and Al2O3 were measured respectively in absence and presence of polyacrylic acid and polyethylene glycol. The influences of milling time, pH value, mass fraction of the additive and solid volume fraction on the stability and fluidity of ZnO-Al2O3 powders aqueous suspension were investigated by experiments of viscosity and sedimentation etc. It is noted that ZnO and Al2O3 powders have absolute value of zeta potential bigger than 45mV in pH value from 8 to 10.3 with adding polyacrylic acid. It is found that the suspension has the lowest viscosity and the best stability when the pH value is around 9 and the additive amount of polyacrylic acid is about 0.2wt%, in which the 55vol% solids content of slurry is obtained with the apparent viscosity less than 400mPa·s. The saturation absorption amount of polyacrylic acid for ZnO-Al2O3 mixed powders could be 0.2wt% in which the apparent viscosity is lower and the suspension stability is good in the pH range from 9 to 10.3. With the additive amount of polyethylene glycol increasing, the viscosity of suspension increase and the stability of suspension decease. The optimized milling time is 40h.

Key words： ZnO-Al2O3 powders; polyacrylic acid; polyethylene glycol; dispersion behavior

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