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Mulcoa 70 Mullite

Refractory Aggregate, Mulgrain 70, Mulcoa 70 Calcine

Alternate Names: Mulcoa 70 Calcined Grog, Mulcoa 70 Calcined Mullite

Oxide Weight147.66
Formula Weight147.66
If this formula is not unified correctly please contact us.
PCE - Pyrometric Cone Equivalent 39
BDGC - Bulk Density g/cc (Packed) 2.88
RC - Reheat Change 0% at 2800F, 0% at 2910F
APPO - Apparent Porosity 3.5%

This material is produced from calcined mullite that is precisely sized through a series of screens and blended to obtain a series of coarse to fine sizes. During screening the grains are de-dusted. The product is used mainly for stucco and investment casting, in ceramics its main application is as a low expansion grog for bodies.

Mulcoa 47 and Mulcoa 60 are alternate products, these numbers refer to the approximate alumina content. Mulcoa 70 is thus the highest in alumina and therefore highest in mullite mineral (87%) and the lowest in glass. Mulcoa 47 is 65% mullite and 20% glass and 15% cristobalite (the others have no cristobalite).
Mulcoa 70 is the most refractory, Mulcoa 60 is 37 PCE and Mulcoa 47 is 35 PCE. Mulcoa 47 has a reheat change of 0.8% at 2800F and 3.1% at 2910F, Mulcoa 60 is zero for both.

Various grades for each are available in the following U.S.S. Sieve Mesh sizes:
10x18, 14x28, 16x30, 22S, 35S, 50S, 60S, 20x50, 35x80, 50x100, 60x200, 300S, 200 IC-C, 325 IC-C

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By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Mulcoa 70 Mullite" descrip="Refractory Aggregate, Mulgrain 70, Mulcoa 70 Calcine" searchkey="Mulcoa 70 Calcined Grog, Mulcoa 70 Calcined Mullite" loi="0.00" casnumber="55964-99-3"> <oxides> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="2.800" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="68.800" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="26.800" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.200" tolerance=""/> </oxides> </material>

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