EPK Kaolin

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PLASTIC WHITE FIRING KAOLIN

Date:2000.12.18
Supplier:Feldspar Corp.
Family:2-Kaolin
Raw Material Weight:
Includes LOI
270.05

Chemistry

CaO 0.18% 0.01
K2O 0.33% 0.01
MgO 0.10% 0.01
Na2O 0.06% 0.00
TiO2 0.37% 0.01
Al2O3 37.36% [1.00]
P2O5 0.24% 0.00
SiO2 45.73% 2.08
Fe2O3 0.79% 0.01
LOI 13.91% 0.00
Total99.06

Notes

A secondary water washed kaolin mined in Florida. It is fairly plastic and very white firing compared with most other American kaolins. It has excellent casting properties. It is considered the best kaolin for use in suspending glazes as it tends to produce a smooth thixotropic slurry.

Free Moisture: 1.4%
Specific Gravity: 2.5 g/cc
Bulk Density, Loose: 32.4 lbs/ft3
Bulk Density, Tapped: 46.2 lbs/ft3
Oil Absorption: 47.3 gm. oil/100 gm. clay
pH (10% Solids-Wt): 5.8
Kaolinite Content: 97%
Surface Area: 24.25 square M/gm

Average Particle Size (microns): 1.36

Particle Size, Microns % Cumulative Undersize:
40, 10, 5, 3, 1, .5, .2

100, 90, 78, 68, 49, 40, 20

Sieve Analysis, Water Washed:
+60 mesh, +80, +100, +200, +325

0.0, 0.0, 0.1, 0.8, 1.5

Viscosity: 6000 CPS @ 35% solids (wt.)
Water of Plasticity: 26.0%
Dry Modulus of Rupture, psi: 300
Linear Shrinkage: 5.8%
Fired Shrinkage, Cone 11: 11.6%
Absorption, Cone 11: 11.3%
C.E.C., Methylene Blue: Acid Treated-5.2 Meq/100 gm
Alkali Response-5.8 Meq/100 gm
H2O2 Reaction-6.5 Meq/100 gm
SO3 Content: .21%

Hazards

See 'KAOLIN'

Report created using INSIGHT