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Sapphire Kaolin

Alternate Names: Saphire Kaolin, Saphhire Kaolin

Oxide Analysis Formula
CaO 0.20% 0.01
K2O 0.19% 0.01
MgO 0.15% 0.01
Na2O 0.10% 0.00
TiO2 1.40% 0.05
Al2O3 38.15% 1.00
SiO2 46.25% 2.06
Fe2O3 0.65% 0.01
LOI13.37%
Oxide Weight 232.85
Formula Weight 268.79

Notes

This is a secondary kaolin with a fine particle size distribution. It has no additives. It imparts high green strength while maintaining the best possible fired color. Sapphire is used in the dinnerware, artware and tile industries.

Physical Properties
===================
Dry M.O.R., psi:* 400
pH: 4.8
C.E.C., meq/100g: 6.5 +/- 1.0
Specific Surface Area, sq metre/g: 16.5
Specific Gravity: 2.6
P.C.E.: 33-34

Particle Size, Microns: 20 10 5 2 1 0.5 325# residue
(% finer than) 99% 97% 93% 81% 72% 56% .5

Fired Properties
================
Color, Cone 8 (L) 83.0
(a) -0.8
(b) 8.6

Shrinkage Cone 10, 100% clay 9.2
Absorption Cone 10, 100% clay 7.8

------------------
*Extruded, 50% ball clay, 50% flint
**50% Clay, 50% Nepheline Syenite

Related Information

Links

Materials Kaolin
Typecodes Kaolin
Pure clay mineral, there are many brand names of varying purity and iron content.

By Tony Hansen


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