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Formula: SiO₂ 46/Al₂O₃ 16/MgO 17/K₂O 10/B₂O₃ 7
Form: Foil
Material: MACOR® Machinable Glass Ceramic
Commodity: Glasses
MACOR® Machinable Glass Ceramic Sheets are made from a high purity glassy ceramic. They combine the properties of technical ceramics with ease of machining for quick prototyping. MACOR® Machinable Glass Ceramic Sheets offer a wide range of variations in size, thickness and composition with 48 different options available. This means that they can be customized for diverse applications like electrical insulators, thermal isolation spacers and semiconductor fabrication components. The unique properties of MACOR® Machinable Glass Ceramic Sheetss make then an ideal technical ceramic for high performance industrial uses.
Tolerances
Foil
| Thickness | ±20% |
|---|
Material Properties for Glasses
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Poor |
| Acids - dilute | Fair |
| Alkalis | Fair |
| Halogens | 0 |
| Metals | 0 |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant | 0 |
| Dielectric strength( kV mm⁻¹ ) | 0 |
| Volume resistivity( Ohmcm ) | >10¹⁴@25 |
Mechanical Properties
| Element | Value |
|---|---|
| Poisson's ratio | 0 |
| Tensile modulus( GPa ) | 67 |
| Hardness - Knoop( kgf mm⁻² ) | 0 |
| Hardness - Vickers( kgf mm⁻² ) | 400 |
| Shear strength( MPa ) | 0 |
| Tensile strength( MPa ) | 0 |
| Fracture toughness( MPam(0.5) ) | 0 |
Physical Properties
| Element | Value |
|---|---|
| Refractive index | 0 |
| Useful optical transmission range | 0 |
| Apparent porosity( % ) | 0 |
| Water absorption - saturation( % ) | 0 |
| Density( gcm⁻³ ) | 2.52 |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 0 |
| Sublimation point( C ) | 0 |
| Upper continuous use temperature( C ) | 800-1000 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 790@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 1.5@20°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 13@20-1000°C |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | 345 |
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