No. 50 China Clay

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	36.10%	1.00
SiO2	48.00%	2.26
Fe2O3	1.00%	0.02
LOI	11.60%	n/a
Oxide Weight		249.77
Formula Weight		282.55

Notes

Particle Size (e.s.d.)
125 microns - <0.1
10 microns - 93
2 microns - 48
1 microns - 35
Modulus of Rupture at 110C
Mn/M2 - 1.6
lbf/in2 - 230
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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