HVA/R Ball Clay

Description: WBB Devon Ball Clay Group 4

Oxide	Analysis	Formula
CaO	0.20%	0.01
K2O	2.60%	0.11
MgO	0.30%	0.03
Na2O	0.40%	0.02
TiO2	1.50%	0.07
Al2O3	26.70%	1.00
SiO2	60.30%	3.83
Fe2O3	0.90%	0.02
LOI	7.10%	n/a
C	0.10%	n/a
Oxide Weight		354.90
Formula Weight		382.43

Notes

Particle Size (e.s.d.)
125 microns - 0.60
10 microns - 96
2 microns - 75
1 microns - 65
Modulus of Rupture at 110C
Mn/M2 - 4.6
lbf/in2 - 670
Defloculant Required - (3:1 Na₂SiO₃(C.100):Na₂CO₃) - 0.8
Water Absorption
1120C - 1.0
1220C - 0.50
Shrinkage Dry to Fired
1120C - 11.50
1220C - 12.50
Reflectance 464nm
1120C - 63
1220C - 37
Refractoriness
Cone - 31, 1690C

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Materials	Ball Clay A fine particled highly plastic secondary clay used mainly to impart plasticity to clay and porcelain bodies and to suspend glaze, slips and engobe slurries.
Typecodes	Ball Clay Ball clays are abundant and very plastic and are used in all types of plastic forming bodies. They are not as white-burning or refractory as kaolins but lower in iron and fluxes than bentonites.

By Tony Hansen
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