K&T Special

Alternate Names: Kentucky Special Ball Clay

Description: Kentucky Ball Clay

Oxide	Analysis	Formula
CaO	0.30%	0.02
K2O	0.90%	0.04
MgO	0.50%	0.05
Na2O	0.20%	0.01
TiO2	1.50%	0.07
Al2O3	27.40%	1.00
SiO2	53.30%	3.30
Fe2O3	1.10%	0.03
LOI	14.80%	n/a
Oxide Weight		317.17
Formula Weight		372.26

Notes

Water of Plasticity: 40.0%
% Dry Shrinkage: 7.5
Dry M.O.R., psi:* 890
pH: 4.3
C.E.C., meq/100g: 11.5
Soluble sulfur:** Med-High

Cone 5 10
----
Total Shrinkage: 15.5% 17.5%
Absorption: 14.0% 3.5%

P.C.E.: 32

Particle Size, Microns: 20 10 5 2 1 0.5 0.2
97% 95% 90% 80% 70% 56% 31%

*Modulus of Rupture Specimens: De-aired, extruded, 50% ball clay, 50% flint
**Low-trace to 150, Med-150-400, High-450+

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.

Data

Pyrometric Cone Equivalent	32

By Tony Hansen
Follow me on

Got a Question?

Buy me a coffee and we can talk