Macor will not creep or deform like high temperature plastics. It has low thermal conductivity, which makes it useful as a high temperature insulator. Macor has excellent dimensional stability in a variety of environments (heat, radiation, etc.). It’s coefficient of thermal expansion readily matches most metals and sealing glasses.

Property	Units	Macor
Maximum Temperature (Oxidizing)	°C	800
Maximum Temperature (Inert)	°C	1000
Thermal Conductivity @ 25°C	W/mK	1.46
Specific Heat	kJ/kg°C	0.79
CTE1 25°C ➞ -100°C	10-6/K	8.1
CTE1 25°C ➞ 300°C	10-6/K	9
CTE1 25°C ➞ 600°C	10-6/K	11.2
CTE1 25°C ➞ 800°C	10-6/K	12.3

 Coefficient of Thermal Expansion (CTE) describes how the size of an object changes with a change in temperature.

Macor machinable glass ceramic is a good electric insulator, especially at high temperatures. It works excellent with high voltages and a broad spectrum of frequencies. It is also radiation resistant.

Property	Units	Macor
Resistivity @ 25°C	ohm-cm	1014
Dielectric Constant @ 1KHz	–	6.01
Dielectric Constant  @ 8.5 GHz	–	5.64
Loss Tangent	1 kHz	0.0040
Loss Tangent	8.5 GHz	0.0025
Dielectric Strength (AC) avg. 25°C, 12 mm thickness	kV/mm	9.4
Dielectric Strength (DC) avg. 25°C, 12 mm thickness	kV/mm	62.4
Volume Resistivity @25°C	ohm-cm	>1017

Disclaimer: The values presented are mean and typical of those resulted from test samples. They are provided as an indication only to serve as guidance in the design of ceramic components and are not guaranteed in any way. The actual values can vary according to the shape and size of the envisioned component.