Effect of Thinning Agents on Properties of High-Alumina Ceramic Castables

The effect of thinning agents on molding mixtures for the production of high-alumina ceramic castables composed of bauxite HCBS (highly concentrated ceramic binding suspensions) and a refractory filler based on fused corundum and SiC is studied. The thinners used were sodium tripolyphosphate (STPP),...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2004-03, Vol.45 (2), p.78-83
Main Authors: Pivinskii, Yu E, Dobrodon, D A, Ermak, Yu N, Cherevatova, A V
Format: Article
Language:English
Subjects:
Antimony
Castable refractories
Ceramic mold casting
Ceramics
Concentration (composition)
Silicon carbide
Solvents
Thinning
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Summary:The effect of thinning agents on molding mixtures for the production of high-alumina ceramic castables composed of bauxite HCBS (highly concentrated ceramic binding suspensions) and a refractory filler based on fused corundum and SiC is studied. The thinners used were sodium tripolyphosphate (STPP), SB-5-grade organic plasticizer, mixtures thereof, and liquid glass. The maximum thinning effect is observed for complex organomineral additives (10 - 33% SB-5 + 67 - 90% STPP). The optimum thinner concentration is 0.08 - 0.1 wt.%. The use of thinners makes it possible to reduce significantly the water demand of concrete mixes and leads to a decrease in porosity and an increase in strength of ceramic castables. The composition and concentration of alkali-containing thinners produce little (if any) effect on the deformation behavior of ceramic castables at high temperatures.[PUBLICATION ABSTRACT]
ISSN:1083-4877
1573-9139
DOI:10.1023/B:REFR.0000029611.54409.ab