Research on Rheological Properties of Vermiculite Based Casting Slurry

Abstract

Abstract: Vermiculite based casting slurry was prepared using ball milling with modified expanded vermiculite and talc as raw materials,castor oil as dispersant,polyvinyl butyral (PVB) as binder and dibutyl phthalate (DBP) as plasticizer.The effects of solid dosages and amount of each component on the rheological properties of slurry were investigated.The suitable mass fraction components of tape casting slurry are obtained as follows:the solid dosage mass fraction of vermiculite powder is 50%,the castor oil dosage is 2%,the PVB dosage is 6%,and the DBP dosage is R=0.8.The casting slurry has plastic fluid characteristics with typical shear thinning behavior.The vermiculite based casting blank prepared by this formula has a uniform surface without cracks.

Key words: expanded vermiculite, slurry, tape casting, rheological property, sealing material

CLC Number:

TD985

HU Shanhai, QIAN Yupeng, JIANG Xuefeng, WANG Fei, DING Feng, ZHAO Shaolin. Research on Rheological Properties of Vermiculite Based Casting Slurry[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 312-316.

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