CC31 China Clay

Alternate Names: Kaolin CC31

Description: Devon China Clay

Oxide	Analysis	Formula
CaO	0.10%	0.01
K2O	2.80%	0.08
MgO	0.20%	0.01
Na2O	0.10%	-
TiO2	0.10%	-
Al2O3	36.30%	1.00
SiO2	47.80%	2.23
Fe2O3	0.90%	0.02
LOI	11.70%	n/a
Oxide Weight		248.12
Formula Weight		280.99

Notes

Particle Size (e.s.d.)
125 microns - <0.06
10 microns - 93
2 microns - 50
1 microns - 35
Modulus of Rupture at 110C
Mn/M2 - 1.3
lbf/in2 - 180
Defloculant Required - (3:1 Na₂SiO₃(C.100):Na₂CO₃) - 0.3
Water Absorption
1120C - 20.5
1220C - 7.00
Shrinkage Dry to Fired
1120C - 10.50
1220C - 17.50
Reflectance 464nm
1120C - 85
1220C - 83
Refractoriness
Cone - 33, 1730C

Related Information

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Materials	Kaolin The purest of all clays in nature. Kaolins are used in porcelains and stonewares to impart whiteness, in glazes to supply Al2O3 and to suspend slurries.
Typecodes	Kaolin Pure clay mineral, there are many brand names of varying purity and iron content.

By Tony Hansen
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