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PBX Fireclay

Description: Dark Plastic Fire Clay

Oxide Analysis Formula
SiO2 45.70% 2.49
Al2O3 31.10% 1.00
Fe2O3 6.10% 0.13
MgO 0.23% 0.02
Na2O 0.03% -
K2O 0.11% -
CaO 0.02% -
TiO2 1.70% 0.07
LOI 15.30%n/a
Oxide Weight 278.75
Formula Weight 329.10

Notes

Was used up until the 1970s but has not been available since. This material was popular since it fired to a very warm brown in oxidation and deep brown in reduction.

Related Information

PBX Fireclay fired test bars


This picture has its own page with more detail, click here to see it.

Cone 10 reduction (top), cone 10 down to 6 oxidation below that (top to bottom). A refractory material.

Links

Materials Fireclay
Typecodes Fireclay
Fireclays are non-kaolin non-ball clay materials similar to stoneware clays but lacking fluxing oxides. Many fireclays have a PCE of 28 or more.
By Tony Hansen
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