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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
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