Albion Sperse

Description: Kaolin

Oxide	Analysis	Formula
CaO	0.24%	0.01
K2O	0.60%	0.02
MgO	0.24%	0.02
Na2O	0.56%	0.03
TiO2	0.71%	0.03
Al2O3	35.52%	1.00
SiO2	45.65%	2.18
Fe2O3	1.25%	0.02
LOI	15.22%	n/a
Oxide Weight		243.43
Formula Weight		287.13

Notes

Albion Sperse is a coarse-grained, air-floated Georgia kaolin which is highly adaptable to slip-casting and filter press operations. It is unique for its high level of pure kaolinite and coarse particle distribution curve. It features excellent dispersion characteristics, low shrinkage, and a clean white fired color.

Albion Sperse is especially suitable for the manufacture of sanitary ware, oxide color pigments, high tension electric porcelain, and art pottery.

Fired Properties
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PCE: 34
Fusion Point: 3200F

Cone 5 8 10 12
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Linear Shrinkage (dry basis %): 6.4 8.2 9.3 10.4
*Modulus of Rupture, (psi): 80 30 100 55
Water Absorption, (%): 24.7 20.3 17.9 15.6
Porosity (%): 40.0 35.5 32.8 29.5
Bulk Density (gm/cc): 1.61 1.78 1.83 1.91
Brightness (% reflectance): 90.2 87.0 85.4 82.0
Whiteness (% reflectance): 4.1 6.2 7.4 9.0
Apparent Specific
Gravity (gm/cc): 2.7 2.7 2.73 2.72

*50% clay:50% kaolin

Unfired Properties
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Specific Gravity (gm/cc): 2.6
Water of Plasticity (%): 29.1
Modulus of Rupture (psi): 20
Brightness: 78
Whiteness: 26.9
pH (28% solids): 5.1

Particle Size Distribtion:

Minus 20 microns: 97.2
-10: 90.3
-5: 72.9
-2: 48.3
-1: 30.8
-0.5: 17.0
-0.2: 9.5

Mean Particle Size (microns): 2

C.E.C. (meq/100 gm): 20.7

Minimum Dispersed Viscosity, cps:
30% solids Brookfield, No. 2 Spindle, 100 RPM: 16

Relative Settling Rate (in/min Baroid Filter Press): 0.035

Related Information

Links

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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