Effect of ISOBAM on Rheological Behavior of Alumina Slurries

Abstract

Abstract: ISOBAM is a novel ceramic additive and mainly used for gel-casting processing as dispersant and gelling agent. The effect of pH value, addition of ISOBAM and milling time on the rheological behavior of alumina slurries was investigated. The gelling mechanism of ISOBAM was also studied. The results show that ISOBAM has an apparent dispersing effect on alumina slurries, due to the interaction via hydrogen bonding between carboxyl group and alumina surface and the improvement of Zeta potential. The alumina slurry with 0.2% (mass fraction) ISOBAM gelatinizes rapidly, since its pH value is close to the isoelectric point. Elastic network forms between ISOBAM molecules and alumina particles via hydrogen bonds.

Key words: ISOBAM, alumina slurry, rheological behavior, dispersant, gelling agent, gelation mechanism

CLC Number:

TQ174

LIN Xiaoqing, WANG Haojian, LIANG Ruofan, SONG Xiaojiao, WU Min, GUAN Kang, PENG Cheng, DU Yang. Effect of ISOBAM on Rheological Behavior of Alumina Slurries[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1338-1343.

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