28 Clay

Description: Plastic Clay - Allier, France

Oxide	Analysis	Formula
CaO	0.20%	0.02
K2O	1.40%	0.07
MgO	0.20%	0.02
Na2O	0.10%	0.01
TiO2	1.90%	0.11
Al2O3	21.50%	1.00
SiO2	66.20%	5.23
Fe2O3	1.40%	0.04
LOI	7.10%	n/a
C	0.30%	n/a
Oxide Weight		440.73
Formula Weight		475.96

Notes

Raw Color - Light Cream - Cream
Particle Size (e.s.d.)
125 microns - 1.0
63 microns - 4.0
20 microns - 92
2 microns - 54
.5 microns - 18
Modulus of Rupture at 110C
Mn/M2 - 2.9
lbf/in2 - 430
Water Absorption
1120C - 13.0
1220C - 5.50
Shrinkage Dry to Fired
1120C - 5.0
1220C - 10.0
Refractoriness
Cone - , 1750C
Plastic Index - 841
PF NO. - 36.2

Related Information

Links

Typecodes	Clay Other Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.

By Tony Hansen
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