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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
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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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