CeramTec Rubalit® 708S Alumina, 96%

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CeramTec Rubalit® 708S Alumina, 96%
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Rubalit® 708S (96%) is an alumina that features high strength and thermal conductivity. It provides outstanding results when used on commercially available thick-film pastes and metallization systems.
Key Words:	Al2O3, aluminum oxide
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Physical Properties	Metric	English	Comments

Density	3.78 g/cc	0.137 lb/in³	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	0.00 %	0.00 %	DIN EN 623-2 / ASTM-C373
Particle Size	3.0 - 5.0 µm	3.0 - 5.0 µm	Median Grain (d50)

Mechanical Properties	Metric	English	Comments
Tensile Modulus	340 GPa	49300 ksi	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	400 MPa	58000 psi	Bending Strength; 4-Point Method (40x4x3 mm³); ASTM-F417
	500 MPa	72500 psi	Bending Strength; Dual Ring Method (0.63 mm Substrate Thickness); DIN 52292

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+8 ohm-cm @Temperature 900 °C	1.00e+8 ohm-cm @Temperature 1650 °F
	1.00e+12 ohm-cm @Temperature 500 °C	1.00e+12 ohm-cm @Temperature 932 °F
	1.00e+13 ohm-cm @Temperature 25.0 °C	1.00e+13 ohm-cm @Temperature 77.0 °F	ASTM-D257
Dielectric Constant	9.8 @Frequency 1e+6 Hz	9.8 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-C150
	10 @Frequency 1e+9 Hz	10 @Frequency 1e+9 Hz	IEC 672-1 / ASTM-C150
Dielectric Breakdown	7000 V @Thickness 0.250 mm	7000 V @Thickness 0.00984 in
	12600 V @Thickness 0.630 mm	12600 V @Thickness 0.0248 in
	15000 V @Thickness 1.00 mm	15000 V @Thickness 0.0394 in
Dielectric Loss Index	0.00030 @Frequency 1e+6 Hz	0.00030 @Frequency 1e+6 Hz	IEC 672-1 / ASTM-D149,150

Thermal Properties	Metric	English	Comments
CTE, linear	6.80 µm/m-°C @Temperature 20.0 - 200 °C	3.78 µin/in-°F @Temperature 68.0 - 392 °F
	7.30 µm/m-°C @Temperature 20.0 - 600 °C	4.06 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	0.800 J/g-°C @Temperature 100 - 200 °C	0.191 BTU/lb-°F @Temperature 212 - 392 °F	DINV ENV 821-3
Thermal Conductivity	24.0 W/m-K	167 BTU-in/hr-ft²-°F	DIN EN 821-2 / ASTM-C408

Component Elements Properties	Metric	English	Comments
Al2O3	96 %	96 %

Descriptive Properties
Color	White
Ra = Arithmetic Mean Roughness Value (µm)	Profilometer (0.8 mm Cutoff)

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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CCERA931 / 107531

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