S-4

Alternate Names: S-4 Ball Clay

Description: Tennessee Ball Clay

Oxide	Analysis	Formula
CaO	0.05%	-
K2O	0.47%	0.02
MgO	0.18%	0.02
Na2O	0.08%	-
TiO2	1.70%	0.08
Al2O3	26.90%	1.00
SiO2	59.90%	3.78
Fe2O3	1.08%	0.03
LOI	9.60%	n/a
Oxide Weight		342.63
Formula Weight		379.01

Notes

Crude Color: Light Brown
Dry M.O.R. (psi 50% clay/50% flint, cast bars): 456
Wet Sieve Residue, +200 mesh (%): 0.24
Water of Plasticity (%): 37
Linear Dry Shrinkage (%): 6.83
Solubles Sulfates (ppm): 206
Filtration (ml): 30
Specific Surface Area (sq meters per gram): 17.9
CEC/MBI (meq/100 ml): 10.0
pH: 5.5
PCE: 30

Firing Shrinkage (%) Cone 04: 5.1 Cone 3: 6.8 Cone 11: 8.0
Absorption (%) 18.0 11.5 4.5

Particle Size (% finer than):
50 microns: 100
20: 96
10: 86
5: 76
1: 53
0.5: 43

Related Information

Links

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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