Evaluation of Some Indian Bentonites for their
Utilization in the Whiteware Industry |
B. K. SEN, S. R. DAs AND S. K. GuHA
Pages : 145-151
DOI : 10.1080/0371750X.1977.10840655 |
Abstract |
Six Indian bentonites, treated as well as untreated, were
incorporated into Amraoti-Betul clay, a non-plastic
clay from Madhya Pradesh for studying the resulting improvement
in plastic and dry properties. The properties
studied include the effect of addition of bentonites on raw
colour, fired colour, water of plasticity, Atterbergs number,
plasticity by feel, dry linear shrinkage, dry modulus of
rupture, suspensibility and workability. The dry MOR value
of the clay increased from 222 psi to 942 psi with ouly 4%
addition of treated bentonite. Into a standard porcelain
composition, 1 % to 4% of untreated and treated bentonites
were added and the study revealed that only 1-2% of dry
treated bentonite improved the suspensibility and casting
properties markedly. The plasticity of a nmnber of claybentonite
mixes was also examined by a Brabender plastograph.
The effects on the dry and fired colour of a whiteware
composition after incorporation of bentonites were studied. |
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