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PBX Fireclay

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% 0.00
K2O 0.11% 0.00
CaO 0.02% 0.00
TiO2 1.70% 0.07
LOI15.30%
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

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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