high quality cordierite raw materialslow price cordierite raw materialscordierite raw materials for salecordierite raw materials in stock
high quality cordierite raw materialslow price cordierite raw materialscordierite raw materials for salecordierite raw materials in stock

Cordierite Raw Materials

Cordierite Raw Materials, The basic raw materials for cordierite refractory products are cordierite fireclay and special MgO-substrates which contribute to the cordierite formation (2MgO·2 Al₂O₃·5SiO₂) at the point of an Al₂O₃ and SiO₂ surplus, in particular in the bonding matrix. Usually, shaping is done by hydraulic dry pressing, in particular for the manufacture of large-shaped kiln furnace covers.

Introduction of Cordierite Raw Materials

Cordierite Raw Materials, The basic raw materials for cordierite refractory products are cordierite fireclay and special MgO-substrates which contribute to the cordierite formation (2MgO·2 Al₂O₃·5SiO₂) at the point of an Al₂O₃ and SiO₂ surplus, in particular in the bonding matrix. Usually, shaping is done by hydraulic dry pressing, in particular for the manufacture of large-shaped kiln furnace covers.

Nature cordierite is a magnesium-iron aluminum cyclosilicate. Cordierite has excellent thermal properties. On the air, however, leads to its transformation into muscovite, biotite, and chlorite. An alternative to natural cordierite is cordierite ceramics - synthetic cordierite. Material containing over 10% of MgO and over 34% of Al₂O₃ is typical for its low thermal expansion coefficient, hardness, and stability. Stable α-cordierite with a melting point of 1435 °C is produced by the decay of magnesium and kaolinitic materials during firing near 1400 °C.

Cordierite is commonly used for the production of special refractory ceramics (burning utilities, etc.) and electrotechnical applications (electrical insulators, contactors, heaters carriers, etc.) due to its low thermal expansion coefficient and high resistance to sudden temperature changes. A suitable composition of cordierite with other types of refractory grog can get good thermally stable materials appropriate for higher temperatures than the own melting point of cordierite pottery. Cordierte-rich products are characterized by their excellent thermal shock resistance due to their very low reversible heat expansion. Their main area of use in kiln cars and as kiln furniture for ceramic firing furnaces relies on the latter.

Features of Cordierite Raw Materials

Good thermal shock resistance.

Low thermal expansion.

Low thermal conductivity.

High dielectric strength.

Fired Temperature (°C) Thermal Expansion Coefficient(x10-6/°C)
1250 3.1
1300 3.16
1350 4.52
1400 2.98

Application of Cordierite Raw Materials

Taking advantage of its good resistance to thermal shocks, cordierite is used in the field of electrical insulation, burner pipes, or kiln furniture in the ceramics industry. This refractory material is also used as raw material in stoneware oven dishes or glass-ceramic cooker hobs.

Sizes of Cordierite Raw Materials

Section Sand Size: 1-0mm 3-1mm 5-3mm 8-5mm

Fine Powder Size: 200Mesh 325Mesh

Package of Cordierite Raw Materials

1MT Big Bag

Chemical & Physical Index

Property Unit Non-Porous Cordierite Porous Cordierite
DIN EN 60 672 Identification C410 C511
Composition % MgO•SiO2•Al MgO•SiO2•Al
Density g/cm3 > 2.1 > 1.9
Bulk Porosity % < 0.5 < 20
Color  yellow, brown, white yellow, brown, white
Mechanical Characteristics at 20 °C
Hardness on Vickers’ Scale HV10  MPa - -
Compressive Strength  MPa > 300 > 200
Flexural Strength  MPa > 60 > 25
Elastic Modulus GPa - -
Thermal Characteristics
Max. Operating Temperature  °C 1,000 1,200
Specific Warmth at 20 °C  J K−1 kg−1 800-1,200 750-850
Thermal Conductivity at 100 °C  W.m-1.K-1 1.5-2.5 1.3-1.8
Expansion Coefficient from 20 to 1,000 °C  10-6/K-1 2-4.5 4-6
Electrical Characteristics
Electrical Resistivity at 20 °C Ω.m > 1010 -
at 600 °C > 103 > 103
Dielectric Strength kV/mm > 10 -

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