Irene Schrüfer-Kolb wrote:
> Dear all,
> could anyone please tell me: what properties make a clay refractory?
>
> Many thanks, Irene
The clay should have a low content of elements that react with silica
and alumina to form liquid phases at low temperatures. Sodium, potassium
and iron are the major culprits. The most refractory clays are
kaolinites, since they contain little but aluminium, silicon, hydrogen
and oxygen.
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