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Master Bond adhesives

Corning Macor® Machinable Glass Ceramic
Categories: Ceramic; Glass; Glass Ceramic; Machinable Ceramic

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.

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Physical PropertiesMetricEnglishComments
Density 2.52 g/cc0.0910 lb/in³
Porosity 0.0 %0.0 %
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 250250100g
Hardness, Rockwell A 4848
Modulus of Elasticity 66.9 GPa9700 ksi
Modulus of Rupture 0.0938 GPa13.6 ksi
Compressive Strength 345 MPa50000 psi
Poissons Ratio 0.290.29
Fracture Toughness 1.53 MPa-m½1.39 ksi-in½
Shear Modulus 25.5 GPa3700 ksi
 
Electrical PropertiesMetricEnglishComments
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
 
Thermal PropertiesMetricEnglishComments
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-°C0.189 BTU/lb-°F
Thermal Conductivity 1.46 W/m-K10.1 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 800 °C1470 °FContinuous
 1000 °C1830 °FNo Load
 
Component Elements PropertiesMetricEnglishComments
Al2O3 16 %16 %
B2O3 7.0 %7.0 %
Fluorine, F 4.0 %4.0 %
K2O 10 %10 %
MgO 17 %17 %
SiO2 46 %46 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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