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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