No. 1 Ball Clay

Alternate Names: Kentucky No. 1 Ball Clay

Description: Kentucky Ball Clay

Oxide	Analysis	Formula
CaO	0.06%	-
K2O	0.32%	0.01
MgO	0.18%	0.02
Na2O	0.09%	0.01
TiO2	2.00%	0.10
Al2O3	26.20%	1.00
SiO2	60.80%	3.94
Fe2O3	0.87%	0.02
LOI	8.84%	n/a
Oxide Weight		352.41
Formula Weight		386.58

Notes

Crude Color: White to Pink
Dry M.O.R. (psi 50% clay/50% flint, cast bars): 300
Wet Sieve Residue, +200 mesh (%): 0.30
Water of Plasticity (%): 32
Linear Dry Shrinkage (%): 5.5
Solubles Sulfates (ppm): 160
Filtration (ml): 23
Specific Surface Area (sq meters per gram): 16.9
CEC/MBI (meq/100 ml): 8.5
pH: 5.8
PCE: 32

Firing Shrinkage (%) Cone 04: 5.0 Cone 3: 5.1 Cone 11: 7.2
Absorption (%) 15.8 12.7 2.5

Particle Size (% finer than):
50 microns: 100
20: 96
10: 92
5: 85
1: 60
0.5: 49

Related Information

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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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