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KT #1-4 Ball Clay

Alternate Names: KT1-4, KT#1-4

Oxide Analysis Formula
CaO 0.20% 0.01
K2O 1.40% 0.06
MgO 0.50% 0.05
Na2O 0.20% 0.01
TiO2 1.90% 0.09
Al2O3 25.80% 1.00
SiO2 60.50% 3.98
Fe2O3 1.00% 0.02
LOI8.70%
Oxide Weight 361.74
Formula Weight 396.21

Notes

A coarse-grained, fast casting Ball Clay used in all types of casting applications, but primarily used in artware. It is a blend containing mostly SGP#1 and some OM#4. It is blended to specification (thus the blend is adjusted as the constituents vary to maintain physical properties). KT1-4 is slightly less plastic than CDI blend, but more plastic and thus less sensitive to deflocculants than SGP.

Physical Properties
===================
Water of Plasticity: 31.8%
Dry Shrinkage: 5.2%
pH: 4.2
Dry M.O.R. (50:50 ball clay:silica, psi): 463
M.B.I. (meq/100g): 6.2
Specific Surface Area (sq-metre/g): 18
Soluble sulfur SO4: Low

P.C.E.: 31

Particle Size, Microns: 20 10 5 2 1 0.5 0.2
(% finer than) 94% 87% 74% 59% 47% 35% 25%

Fired Properties
================
Cone 5 10
Total Shrinkage: 11.3% 14.2%
Absorption: 12.1% 4.9%

Shipped from Mayfield, KY

*This info is from a data sheet from 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.
Materials Spinks Blend Ball

Data

Drying Shrinkage6.5%
Modulus of Rupture - Dry825 psi

By Tony Hansen

Monthly Tech-Tip from Tony Hansen

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