CeramTec 665 Steatite, MgO•SiO2

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CeramTec 665 Steatite, MgO•SiO2
Categories:	Ceramic; Oxide; Magnesium Oxide; Silicon Oxide
Material Notes:	Steatites used in place of aluminas are a cost-effective way to meet performance requirements. They are easier to form and fire at lower temperatures. 665 L533C has low dielectric loss. It makes excellent insulators for radio frequency applications.
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Physical Properties	Metric	English	Comments

Density	2.80 g/cc	0.101 lb/in³	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	0.00 %	0.00 %	DIN EN 623-2 / ASTM-C373

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	420	420	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	68.8 MPa	9980 psi	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	117 GPa	17000 ksi	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	145 MPa	21000 psi	20 x 40 mm
Compressive Strength	619 MPa	89800 psi	ASTM C-773-88 / DIN 51067T1
Poissons Ratio	0.25	0.25	DINV ENV 843-2
Shear Modulus	45.0 GPa	6530 ksi

Electrical Properties	Metric	English	Comments
Volume Resistivity	800000 ohm-cm @Temperature 900 °C	800000 ohm-cm @Temperature 1650 °F
	3.00e+8 ohm-cm @Temperature 500 °C	3.00e+8 ohm-cm @Temperature 932 °F
	>= 1.00e+14 ohm-cm @Temperature 25.0 °C	>= 1.00e+14 ohm-cm @Temperature 77.0 °F	ASTM-D257
	1.00e+14 ohm-cm @Temperature 100 °C	1.00e+14 ohm-cm @Temperature 212 °F	IEC 672-1
Dielectric Constant	6.1 @Frequency 1e+6 Hz	6.1 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-C150
Dielectric Strength	9.055 kV/mm	230.0 kV/in	6.35 mm (1/4") IEC 672-1
Dissipation Factor	0.00080 @Frequency 1e+6 Hz	0.00080 @Frequency 1e+6 Hz
	0.0020 @Frequency 1e+10 Hz	0.0020 @Frequency 1e+10 Hz
Dielectric Loss Index	0.0050 @Frequency 1e+6 Hz	0.0050 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-D149,150

Thermal Properties	Metric	English	Comments
CTE, linear	6.90 µm/m-°C @Temperature 20.0 - 200 °C	3.83 µin/in-°F @Temperature 68.0 - 392 °F
	7.80 µm/m-°C @Temperature 20.0 - 600 °C	4.33 µin/in-°F @Temperature 68.0 - 1110 °F	ASTM-C373
	8.00 µm/m-°C @Temperature 20.0 - 1000 °C	4.44 µin/in-°F @Temperature 68.0 - 1830 °F
Specific Heat Capacity	1.10 J/g-°C @Temperature 100 - 200 °C	0.263 BTU/lb-°F @Temperature 212 - 392 °F	DINV ENV 821-3
Thermal Conductivity	5.90 W/m-K	40.9 BTU-in/hr-ft²-°F	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1000 °C	1830 °F

Descriptive Properties
Color	Buff
Te Value (°C)	870
Thermal Shock Resistance R1 (K)	650		Hasselman (Experimental)

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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CCERA923 / 107523

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