CeramTec 447 Cordierite

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CeramTec 447 Cordierite
Categories:	Ceramic; Oxide; Aluminum Oxide; Magnesium Oxide; Silicon Oxide
Material Notes:	Cordierites have low coefficients of thermal expansion and excellent resistance to thermal shock. They offer a range of thermal expansion, mechanical strength, and porosity criteria. They excel as cost-effective extruded and dry-pressed forms. 447 offers excellent thermal shock resistance with high continuous porosity, suitable for applications such as welding tile.
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Physical Properties	Original Value	Comments

Density	1.80 g/cc	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	14 - 17 %	DIN EN 623-2 / ASTM-C373

Mechanical Properties	Original Value	Comments
Vickers Microhardness	280	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	17.2 MPa	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	125 GPa	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	23.4 MPa	20 x 40 mm
Compressive Strength	123 MPa	ASTM C-773-88 / DIN 51067T1
Poissons Ratio	0.20	DINV ENV 843-2
Shear Modulus	50.0 GPa

Electrical Properties	Original Value	Comments
Volume Resistivity	700000 ohm-cm @Temperature 900 °C
	4.90e+7 ohm-cm @Temperature 500 °C
	1.00e+13 ohm-cm @Temperature 100 °C	IEC 672-1
	1.00e+14 ohm-cm @Temperature 25.0 °C	ASTM-D257
Dielectric Constant	4.1 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-C150
Dielectric Strength	2.362 kV/mm	6.35 mm (1/4") IEC 672-1
Dissipation Factor	0.012 @Frequency 1e+6 Hz
Dielectric Loss Index	0.048 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-D149,150

Thermal Properties	Original Value	Comments
CTE, linear	0.600 µm/m-°C @Temperature 20.0 - 200 °C
	1.50 µm/m-°C @Temperature 20.0 - 600 °C	ASTM-C373
	1.70 µm/m-°C @Temperature 20.0 - 1000 °C
Specific Heat Capacity	0.700 J/g-°C @Temperature 100 - 200 °C	DINV ENV 821-3
Thermal Conductivity	1.70 W/m-K	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1100 °C

Descriptive Properties
Color	Brown
Te Value (°C)	850
Thermal Shock Resistance R1 (K)	800	Hasselman (Experimental)

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CCERA925 / 107525

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