M-44 Ball Clay

Alternate Names: M 44

Description: Kentucky Ball Clay

Oxide	Analysis	Formula
CaO	0.13%	0.01
K2O	1.20%	0.05
MgO	0.42%	0.04
Na2O	0.10%	0.01
TiO2	1.20%	0.06
Al2O3	24.90%	1.00
SiO2	60.90%	4.15
Fe2O3	1.40%	0.04
LOI	10.20%	n/a
Oxide Weight		369.70
Formula Weight		411.69

Notes

Crude Color: Grey
Dry M.O.R. (psi 50% clay/50% flint, cast bars): 700
Wet Sieve Residue, +200 mesh (%): 0.97
Water of Plasticity (%): 35
Linear Dry Shrinkage (%): 7.5
Solubles Sulfates (ppm): 640
Filtration (ml): 16
Specific Surface Area (sq meters per gram): 20.1
CEC/MBI (meq/100 ml): 11.0
pH: 6.4
PCE: 31

Firing Shrinkage (%) Cone 04: 3.8 Cone 3: 7.5 Cone 11: 8.0
Absorption (%) 12.4 6.7 2.5

Particle Size (% finer than):
50 microns: 99
20: 96
10: 89
5: 83
1: 60
0.5: 45

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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