Volclay Bentonite
364CER,334,355,660,149,446,105,356,840,331,351
Formula: (Na,Ca)0.33 (Al1.67Mg0.33)Si4O10(OH)2 nH2O
| P325 - % Passing 325 Mesh Wet |
90% |
| AVSC - Apparent Viscosity (cps) |
12 cps minimum @ 6.25% solids |
| pHPW - pH for dry powder |
8.5-10.5 @ 5% solids |
| P200 - % Passing 200 Mesh Wet |
97% |
A micronized sodium bentonite.
The 325 mesh version of this is most suitable for porcelains and a possible substitute for the more expensive HPM-20 Volclay.
Dioctahedral smectite, an expanding layer silicate.
Gray and cream-colored clays (montmorillonites) for use as suspension agents, viscosifiers, gellants and binders.
Has lower iron content that HPM-20 bentonite.
However while they company refers to their 325 mesh product, the data sheet says that 90% passes 325 mesh?
Out Bound Links
Pictures
Example of the oversize particles from a 325 mesh screen (left) and 200 mesh (right) fired to cone 8. This bentonite (Volclay 325) has 2% residue on 325 and 1% on 200.
A comparison of the plasticity of Volclay 325 Bentonite:Silica 25:75 (top) and Hectalite:Silica 50:50 (a refined version). Both are mixed with The latter is much less plastic even though it is double the percentage in the recipe.
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Volclay Bentonite" descrip="364CER,334,355,660,149,446,105,356,840,331,351" searchkey="Volclay 325 Bentonite, Dioctahedral smectite" loi="0.00" casnumber="70694-09-6">
<oxides>
<oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.650" tolerance=""/>
<oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="2.670" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="2.570" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="21.080" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="63.020" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="3.250" tolerance=""/>
<oxide symbol="FeO" name="Ferrous Oxide" status="" percent="0.350" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="LOI" name="Loss on Ignition" percent="5.640" tolerance=""/>
</volatiles>
</material> | 
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