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Bentone EW

Rheological additive for ceramic glazes

OxideAnalysisFormula
CaO5.50%0.130
Li2O1.30%0.058
MgO22.70%0.745
Na2O3.20%0.068
Al2O30.80%0.010
SiO253.20%1.170
Fe2O30.30%0.002
LOI12.70
Oxide Weight115.00
Formula Weight131.72
If this formula is not unified correctly please contact us.

Getting a start on testing Bentone

Getting a start on testing Bentone

Bentone (AKA Macaloid) is a super plastic additive used to modify rheolgy in many consumer products. It is made by refining Hectorite. It is very difficult to mix pure Bentone with water, it is just so sticky and the water content is so high, it takes a week to dry a sample and it cracks into pieces during drying. I am studying five different grades for use as a plasticizer in premium porcelains. I am interested in how they stack up against the king: VeeGum T (both in price and performance). The first step was to fire square tiles of the powder on small porcelain tiles at cone 6 to compare the iron content. Three sintered into a solid mass, shrinking to about half the size. The CT grade is the natural, untreated Hectorite clay (accounting for its darker color), the processing to purify the material obviously increases its affinity for water, shrinkage and fired maturity.

Out Bound Links

In Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Bentone EW" descrip="Rheological additive for ceramic glazes" searchkey="" loi="0.00" casnumber="12173-47-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="5.500" tolerance=""/> <oxide symbol="Li2O" name="Lithium Oxide, Lithia" status="" percent="1.300" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="22.700" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="3.200" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="0.800" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="53.200" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.300" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="12.700" tolerance=""/> </volatiles> </material>


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