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Formula: Muscovite Mica
Form: Foil
Material: Potassium Aluminosilicate
CAS Number: 1327-44-2
Commodity: Ceramics
Potassium Aluminosilicate sheets are available in a wide range of 28 variations. They combine potassium oxide, aluminum oxide and silicon dioxide into a glass-ceramic with properties such as high strength, hardness and chemical resistance. These sheets are used in applications requiring thermal shock resistance like high-temperature insulation and kiln furniture. With numerous size and thickness options available, Goodfellow's Potassium Aluminosilicate sheets give designer and manufacturers the flexibility they need.
Tolerances
Foil
| Thickness | ±20% |
|---|
Material Properties for Ceramics
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Fair |
| Acids - dilute | Good |
| Alkalis | Good |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant | 6-6.6 |
| Dielectric strength( kV mm⁻¹ ) | 40-200 |
| Volume resistivity( Ohmcm ) | 10¹²@25 |
Physical Properties
| Element | Value |
|---|---|
| Refractive index | 1.5-1.6 |
| Useful optical transmission range | 450-700nm |
| Water absorption - saturation( % ) | Very Low |
| Density( gcm⁻³ ) | 2.6-3.2 |
Thermal Properties
| Element | Value |
|---|---|
| Upper continuous use temperature( C ) | 500-600 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 50@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.5-7@20°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 9-36@20-1000°C |
Mechanical Properties
| Element | Value |
|---|---|
| Hardness - Vickers( kgf mm⁻² ) | 02-Mar |
| Shear strength( MPa ) | 215-265 |
| Tensile strength( MPa ) | 170-300 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | 190-280 |
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