Macor Machinable Glass Ceramic – Properties & applications

Project Description

Macor ® Machinable Glass Ceramic

Macor® is a machinable glass ceramic material that posses outstanding engineering properties. Unlike other ceramics Macor® can be machined with ordinary metalworking tools. Macor® is also a problem solving material combining the performance of a technical ceramic with the versatility of a high performance plastic. Macor® has no porosity and when properly baked out and will not outgas. It is strong, rigid and, unlike high temperature plastics, will not creep or deform and is also radiation resistant. MACOR® remains continuously stable at 800 °C, with a maximum peak at 1000 °C under no load.

Key Benefits

Easily machinable
Withstands high temperatures
Low thermal conductivity
Electrical insulator
Zero porosity and no out gassing
Strong & rigid
Highly polishable
can be soldered to a wide range of material
Radiation resistant
Lead free

Advanced Finishing Services

Precision grinding and lapping
Laser machining
Engineering design and support
Metallizing
Threaded components

Material Properties (Macor Glass Ceramic)

Mechanical

Density	2.52 g/cm3
Porosity	0%
Young’s Modulus, 25°C	66.9 GPa
Poisson’s Ratio	0.29
Shear Modulus, 25°C	25.5 GPa
Hardness, Knoop, 100g	250
Rockwell A	48
Modulus of Rupture, 25°C	94 MPa
Compressive strength	345 MPa
Fracture Toughness	1.53 MPa m0.5

Thermal

Thermal
Coefficient of Expansion
-200 to 25°C	74×10-7/°C
25 to 300°C	93×10-7/°C
25 to 600°C	114×10-7/°C
25 to 800°C	126×10-7/°C
Specific Heat, 25°C	.79KJ/kg°C
Thermal Conductivity, 25°C	1.46 W/m°C
Thermal Diffusivity, 25°C	7.3×10-7m2/s
Continuous Operating Temperature	800°C
Maximum No Load Temperature	1000°C

Electrical

Electrical
Dielectric Constant, 25°C
1 KHz	6.03
8.5 GHz	5.67
Loss Tangent, 25°C
1KHz	4.7×10-3
8.5 GHz	7.1×10-3
Dielectric Strength (AC) avg (at 0.3mm thickness and 25°C)	9.4 KV/mm
Dielectric Strength (DC) avg. (at 0.3mm thickness and 25°C)	62.4 KV/mm
DC Volume Resistivity, 25°C	>1016 ohm-cm

Notes

*The chart is intended to illustrate typical properties. Property values vary with method of manufacture, size, and shape of part. Data contained herein is not to be construed as absolute and does not constitute a representation or warranty for which Ortech, Inc. assumes legal responsibility.