Monmouth Fireclay

Oxide	Analysis	Formula
CaO	0.11%	-
K2O	0.55%	0.01
MgO	0.30%	0.02
Na2O	0.01%	-
TiO2	0.84%	0.02
Al2O3	45.01%	1.00
SiO2	50.97%	1.92
Fe2O3	2.21%	0.03
Oxide Weight		226.62
Formula Weight		226.62

Notes

We do not have a description of this clay and can only guess based on the chemistry. The iron content means it will fire buff. The low fluxing oxide content and very high Al₂O₃ level (almost impossible since even pure kaolin is not this high) means this would be very refractory. We have no LOI value, it would likely be 12% or more, thus reducing all the other values by that amount. A best guess would be that this is an unprocessed kaolin.

This material is no longer available but just ordinary kaolin would likely be a viable substitute (the body would fire whiter so this could be compensated by adding a little iron oxide to the recipe).

Related Information

Links

Materials	Fireclay
Materials	Monmouth Clay
Typecodes	Refractory Materials that melt at high temperatures. These are normally used for kiln bricks, furniture, etc. or for ceramics that must withstand high temperatures during service.
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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