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Imco 400 Fireclay


Alternate Names: Imco 400

Oxide Weight311.05
Formula Weight352.26
If this formula is not unified correctly please contact us.
SADR - Sieve Analysis Dry +65: 0.1 +100: 0.1 +150: 0.2 +200: 0.4 +325: 0.5
WABS - Water absorption Cone 6: 4% Cone 7: 1% Cone 8: 0.1% Cone 10: 0%
FSHR - Firing Shrinkage Cone 6: 7.7% Cone 7: 8.2 Cone 8: 8.7 Cone 9: 8.5 Cone 10: 8.0
DSHR - Drying Shrinkage 5% @ 27% water

A milled and air floated Lincoln fireclay. An all purpose clay with high strength and plasticity.

It is not clear why the chemistry for this is different than for IMCO 800 if they are both airfloated Lincoln fireclays.

In our tests we found it to be very smooth, plastic and has a kaolinish feel. It has high alumina like a kaolin. Although it fires straw-colored at cone 6, it turns to greenish at cone 7 and becomes very dense by 9. It is still stable at cone 11 and cone 10R is not bloating or expanding either. It has some light brownish scumming on the 8+ bars at the edges (but this covers most of the surface on the 10R bar). This is not really a fireclay, it is vitreous at cone 10.

IMCO 400 Fireclay fired bars

IMCO 400 Fireclay fired bars

Cone 10R top, 11 oxidation and downward below that.

Out Bound Links

In Bound Links

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Imco 400 Fireclay" descrip="Fireclay" searchkey="Imco 400" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.660" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.660" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="1.420" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.140" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="1.280" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="28.500" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="52.000" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="2.250" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="11.700" tolerance=""/> </volatiles> </material>

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