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Kentucky Stone

Alternate Names: Kentky Stn, Kentucky Stone Clay

Description: Kentucky Ball Clay

Oxide Analysis Formula
CaO 0.20% 0.02
K2O 1.20% 0.06
MgO 0.50% 0.06
Na2O 0.20% 0.02
TiO2 1.30% 0.08
Al2O3 20.00% 1.00
SiO2 69.00% 5.86
Fe2O3 1.80% 0.06
LOI 7.10%n/a
Oxide Weight 480.42
Formula Weight 517.14

Notes

A coarse-grained, siliceous, illitic Ball Clay known for its high strength and plasticity. Applications include artware and ceramic tile. The high free silica content means that bodies with a high percentage of this material could cause certain glazes to shiver.

Physical Properties
===================
Water of Plasticity*: 26.6%
% Dry Shrinkage*: 5.4
Dry M.O.R. (50:50 ball clay:silica) psi:* 776
pH: 3.9
M.B.I. (meq/100g): 10.1
Specific Surface Area (sq metre/g): 20
Soluble sulfur SO4: Medium

P.C.E.: 24

Particle Size, Microns: 20 10 5 2 1 0.5 0.2
(% finer than) 91% 81% 69% 55% 59% 37% 26%

Fired Properties
================
Cone 5 10
Total Shrinkage: 8.0% 10.1%
Absorption: 12.1% 5.1%

*This info is from a data sheet data Jan 2013

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 24
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