What is Chamotte?
Chamotte—also known as ‘grog’ and ‘firesand’—is calcined clay containing a high proportion of silica and alumina. It is produced by firing selected fire clays in a rotary kiln to temperatures between 1,400°C and 1,600°C, before grinding and screening to specific particle sizes.
Composition
Typical chamotte contains 40% minimum alumina, 30% minimum silica, 4% maximum iron oxide, and up to 2% calcium oxide and magnesium oxide combined. The particle size distribution is generally coarser in size than other raw materials used to prepare clay bodies.
Physical properties
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Low porosity
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High density
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Excellent thermal stability
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Excellent thermal shock resistance
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High mechanical resistance
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Corrosion resistance
- Ceramics
- Kiln furniture
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Ceramics
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Kiln furniture
