Cordierite

Cordierite is a magnesium aluminum silicate which possesses an extremely low thermal expansion and low thermal conductivity. Cordierite is used when thermal shock is a concern in the finished product. Available in self-glazing form where higher strength, thermal shock, and dielectric strength is required. Applications include refractory shapes, welding tapes, heaters, thermocouples, and appliance insulators.

Cordierite Properties	Units	ACT 200
Material		Cordierite & Self-Glazing Cordierite
General Application		Appliance Insulators, Refractories, Kiln Furniture & High Thermal Shock Applications
Color (Fired)		Tan
Porosity	%	0-.15
Density	gm/cm3	2.5-2.6
Flexural Strength	psi	15,000-20,000
Comprehensive Strength	psi	30,000-50,000
Tensile Strength	psi	-
Linear Coefficient of Thermal Expansion	(cm/cm/°C) 25-300°C 25-700°C	3.0 X 10-6 3.5 X 10-6
Dielecctric Constant at 25°C	1 MH 10 MH	4.0 5.0
Dielectric Strength	Volt/mil	180
Te Value	°F °C	750 400
Thermal Conductivity at 25°C	cal/sec/cm2/cm/°C	0.004
Thermal Shock		Excellent
Safe Use Temperature	°F °C	2200 1200

Above values are test specimen results and actual shapes may vary in value.
We can work with other formulations as well.