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Corning Macor® Machinable Glass Ceramic
| Category | Ceramic , Glass , Glass Ceramic , Machinable Ceramic |
| Manufacturer | Corning Incorporated |
| Trade Name | Macor® |
| Port | Shanghai port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Corning Macor® Machinable Glass Ceramic.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
The CTE of Macor® matches most metals and sealing glasses. It is nonwetting, exhibits zero porosity, and, unlike ductile materials, will not deform. It is an excellent insulator at high voltages, various frequencies, and high temperatures. When properly baked out, it will not outgas in vacuum.Used in ultra-high vacuum environments, constant vacuum applications, aerospace, nuclear-related experiments (not affected dimensionally by irradiation), welding nozzles, electrode and furnace fixtures, and medical equipment.Information provided by Corning Incorporated.
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 2.52 g/cc | 0.0910 lb/in³ | |
| Porosity | 0.0 % | 0.0 % |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Knoop | 250 | 250 | 100g |
| Hardness, Rockwell A | 48 | 48 | |
| Modulus of Elasticity | 66.9 GPa | 9700 ksi | |
| Modulus of Rupture | 0.0938 GPa | 13.6 ksi | |
| Compressive Strength | 345 MPa | 50000 psi | |
| Poissons Ratio | 0.29 | 0.29 | |
| Fracture Toughness | 1.53 MPa-m½ | 1.39 ksi-in½ | |
| Shear Modulus | 25.5 GPa | 3700 ksi |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 7.40 µm/m-°C @Temperature -200 - 25.0 °C |
4.11 µin/in-°F @Temperature -328 - 77.0 °F |
|
| 9.30 µm/m-°C @Temperature 25.0 - 300 °C |
5.17 µin/in-°F @Temperature 77.0 - 572 °F |
||
| 11.4 µm/m-°C @Temperature 25.0 - 600 °C |
6.33 µin/in-°F @Temperature 77.0 - 1110 °F |
||
| 12.6 µm/m-°C @Temperature 25.0 - 800 °C |
7.00 µin/in-°F @Temperature 77.0 - 1470 °F |
||
| Specific Heat Capacity | 0.790 J/g-°C | 0.189 BTU/lb-°F | |
| Thermal Conductivity | 1.46 W/m-K | 10.1 BTU-in/hr-ft²-°F | |
| Maximum Service Temperature, Air | 800 °C | 1470 °F | Continuous |
| 1000 °C | 1830 °F | No Load |
| Component Elements Properties | Metric | English | Comments |
|---|---|---|---|
| Al2O3 | 16 % | 16 % | |
| B2O3 | 7.0 % | 7.0 % | |
| Fluorine, F | 4.0 % | 4.0 % | |
| K2O | 10 % | 10 % | |
| MgO | 17 % | 17 % | |
| SiO2 | 46 % | 46 % |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | >= 1.00e+16 ohm-cm | >= 1.00e+16 ohm-cm | |
| Dielectric Constant | 5.67 @Frequency 8.50e+9 Hz |
5.67 @Frequency 8.50e+9 Hz |
|
| 6.03 @Frequency 1000 Hz |
6.03 @Frequency 1000 Hz |
||
| Dielectric Strength | 30.9 kV/mm @Thickness 0.305 mm |
785 kV/in @Thickness 0.0120 in |
AC |
| 205.0 kV/mm @Thickness 0.305 mm |
5206 kV/in @Thickness 0.0120 in |
DC | |
| Dissipation Factor | 0.0047 @Frequency 1000 Hz |
0.0047 @Frequency 1000 Hz |
|
| 0.0071 @Frequency 8.50e+9 Hz |
0.0071 @Frequency 8.50e+9 Hz |
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