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Bell Dark Ball Clay

Oxide Analysis Formula
CaO 0.20% 0.01
K2O 0.70% 0.03
MgO 0.40% 0.04
Na2O 0.20% 0.01
TiO2 2.10% 0.10
Al2O3 26.80% 1.00
SiO2 58.90% 3.73
Fe2O3 1.10% 0.03
LOI10.30%
Oxide Weight 344.06
Formula Weight 383.57

Notes

A very plastic ball clay used in industrial and hobby clay bodies of all types. Primary applications are dinnerware and artware.

Physical Properties
===================
Water of Plasticity: 33.5%
% Dry Shrinkage: 6.1
Dry M.O.R. (50:50 ball clay:silica) psi:* 560
pH: 4.1
M.B.I. meq/100g: 8.0
Specific Surface Area (sq-metre/g): 24.1
Soluble sulfur+: Low

P.C.E.: 38

Particle Size, Microns: 20 10 5 2 1 0.5 0.2
(% finer than) 99% 94% 85% 75% 63% 52% 38%

Fired Properties
================
Cone 5 10
----
Total Shrinkage: 12.7% 15.6%
Absorption: 12.5% 6.1%

------------------
*Extruded, 50% ball clay, 50% flint
+Low-trace to 150, Med-150-400, High-450+
**50% Clay, 50% Nepheline Syenite

*This information is from a data sheet dated Jan 2013.

Related Information

Links

Materials Ball Clay
Suppliers K&T Clays
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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