Refractory high temperature Cordierite batts for fire terracotta tile
1. Introduction
Cordierite Kiln Shelves are made of Magnesium Aluminum Silicate which has very low thermal expansion and low thermal conductivity. Cordierite can withstand fast heating or cooling and is used when thermal shock is a concern traditionally used in top loading electric kilns. Cordierite kiln shelves are more susceptible to warping at higher temperatures with maximum firing temperature is cone 8. Shelves used up to cone 6 should be at least ¾” thick, and those used to a maximum of cone 10 should be at least 1” thick which makes them heavy. Cordierite has 13-25% porosity rate which will be a problem with glaze dripping (the glaze can easily penetrate the surface and melt into the shelf). Kiln wash should therefore be used to protect the surface. Cordierite kiln shelves are not recommended for salt or wood firings.
* Cordierite, a naturally occurring mineral, composed of approximately 33% Alumina and 60% silica with small amounts of other minerals dry pressing under high pressure.
2. Technical parameter
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Item and Descriptions
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Specifications Offered
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Al2O3 (%)
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40~48
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SiO2 (%)
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45~48
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MgO (%)
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5~8
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MOR(MPa)
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20℃
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14
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1250℃
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12
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Bulk Density(g/cm3)
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2.0
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Open Porosity(%)
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28
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Phase composition(%)
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Mullite
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55
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Cordierite
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30
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Max. Service temperature ℃
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1280
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3. Application
Cordierite batts is widely used to sinter pottery , ceramic insulator and so on.Using temperature can not be over 1300 ℃
We can also supply SiSic beam.
4. Package
We use Plywood box to pack Cordierite batts.
We have professional logistic company, they can deliver to any port in the world and they can offer very good price.
