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Low Expansion Material
Materials used to make bodies requiring low expansion (e.g. flameware, refractories). The individual particles of these materials have low expansion. Some of theme even expand at certain temperature ranges.
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| Materials |
Calcined Kaolin
This is kaolin powder that has been fired in a furnace to remove the 12% crystal water and render it non-plastic. |
| Materials |
Kyanite
A refractory aluminum silicate mineral notable for low thermal expansion and one-way volume expansion as it converts to mullite at high temperatures. |
| Materials |
Pyrophyllite
A refractory aluminum silicate mineral often used in clay body recipes to lower thermal expansion, control fired maturity, mullite development catalyst, etc. |
| Materials |
Andalusite
A low expansion aluminum silicate mineral that converts to mullite on repeated firings. |
| Materials |
Calcined Alumina
A high-purity Al2O3 used in technical ceramics, refractories, glazes, and bodies for its extreme hardness, high-temperature strength, and chemical stability. |
| Materials |
Zircon
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| Materials |
Molochite
Powdered and granular forms are produced by calcining kaolin so high that it converts completely to crystalline mullite. |
| Materials |
Talc
A source of MgO for ceramic glazes, a flux or thermal expansion additive in clay bodies, also used in the manufacture of cordierite. |
| Glossary |
Pyroceramics
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