Alkatrol

Andalusite/pyrophyllite/sericite

Chemistry

TiO2	0.500
Al2O3	21.000
SiO2	73.100
Fe2O3	0.400
K2O	1.300
Na2O	1.300

Volatiles

LOI

2.500

Miscellaneous

Family: AlumSilicate
Region: North America
Mined At: Unspecified
Raw Mineral: No
Generic: Yes

Notes

Sericite is blended with andalusite/pyrophyllite ore to lower the PCE and produce the Alkatrol series of products. These are added to wall and floor tile to increase fired strength, in stoneware, structural ceramics, coatings, and whiteware ceramics to improve whiteness, widen firing range, reduce warpage, increase thermal shock resistance, and stabilize shrinkage.

This material is manufactured by crushing & screening and dry milling of selectively mined andalusite/pyrophyllite/sericite ores.

Individual alkatrol variations have different chemistries, the one shown here is an average.

Properties

Body Maturity - Mullite Formation
Assists in the formation of mullite at lower temperatures than formed by conventional alumina-silica sources.
Body Plasticity - Extrusion
Moderately high percentages of the Alkatrol products can be substituted in body compositions to reduce laminations in pressing and to aid in extrusion.
Body Thermal Expansion -
Add this to reduce thermal expansion and reduce firing shrinkage.

Data

Specific Gravity: 2.60
Specific Gravity: 2.60

Suppliers

Piedmont Minerals
RESCO Products

Authors

Tony Hansen (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="Alkatrol" descrip="Andalusite/pyrophyllite/sericite" generic="1" rawmineral="0" searchkey="" loi="2.50">
<families>
<family name="AlumSilicate"/>
</families>
<regions>
<region name="North America"/>
</regions>
<oxides>
<oxide symbol="K2O" name="Potassium Oxide" status="" percent="1.300" tolerance=""/>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="1.300" tolerance=""/>
<oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.500" tolerance=""/>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="21.000" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="73.100" tolerance=""/>
<oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.400" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="" name="" percent="2.500" tolerance=""/>
</volatiles>
<references>
<reference name="seealso" reason=""/>
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<suppliers>
<supplier name="Piedmont Minerals" country="US" url="" label=""/>
<supplier name="RESCO Products" country="US" url="www.rescoproducts.com" label=""/>
</suppliers>
<notes>
<note>Sericite is blended with andalusite/pyrophyllite ore to lower the PCE and produce the Alkatrol series of products. These are added to wall and floor tile to increase fired strength, in stoneware, structural ceramics, coatings, and whiteware ceramics to improve whiteness, widen firing range, reduce warpage, increase thermal shock resistance, and stabilize shrinkage.

This material is manufactured by crushing & screening and dry milling of selectively mined andalusite/pyrophyllite/sericite ores.

Individual alkatrol variations have different chemistries, the one shown here is an average.</note>
</notes>
<testdata>
<testitem testname="11" value="2.60"/>
<testitem testname="11" value="2.60"/>
</testdata>
</material>

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