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CeramTec Rubalit® 708 Alumina, 96%

Category	Ceramic , Oxide , Aluminum Oxide
Manufacturer	CeramTec North America
Trade Name
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	CeramTec Rubalit® 708 Alumina, 96%.pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

Based on 96% aluminum oxide, Rubalit® 708 was developed specifically for making heavy-duty resistors and miniature metal layer resistors. Because of its outstanding strength, this same material is also used for precision wire-wound resistors.

Physical Properties	Metric	English	Comments
Density	3.75 g/cc	0.135 lb/in³
Water Absorption	0.00 %	0.00 %	ASTM-C373

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell 45 N	78	78	ASTM-E18
Flexural Strength	420 MPa	60900 psi	Bending Strength; ASTM-F417

Thermal Properties	Metric	English	Comments
CTE, linear	4.40 µm/m-°C @Temperature 20.0 - 100 °C	2.44 µin/in-°F @Temperature 68.0 - 212 °F	ASTM-C372
	6.30 µm/m-°C @Temperature 20.0 - 300 °C	3.50 µin/in-°F @Temperature 68.0 - 572 °F	ASTM-C372
	7.30 µm/m-°C @Temperature 20.0 - 600 °C	4.06 µin/in-°F @Temperature 68.0 - 1110 °F	ASTM-C372
	8.00 µm/m-°C @Temperature 20.0 - 1000 °C	4.44 µin/in-°F @Temperature 68.0 - 1830 °F	ASTM-C372
Thermal Conductivity	24.0 W/m-K	167 BTU-in/hr-ft²-°F	ASTM-C408
Maximum Service Temperature, Air	1400 °C	2550 °F

Component Elements Properties	Metric	English	Comments
Al2O3	96 %	96 %

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+8 ohm-cm @Temperature 600 °C	1.00e+8 ohm-cm @Temperature 1110 °F	ASTM-D1829
	1.00e+11 ohm-cm @Temperature 400 °C	1.00e+11 ohm-cm @Temperature 752 °F	ASTM-D1829
	1.00e+12 ohm-cm @Temperature 200 °C	1.00e+12 ohm-cm @Temperature 392 °F	ASTM-D257
Dielectric Strength	>= 10.0 kV/mm	>= 254 kV/in	ASTM-D149

Descriptive Properties	Value	Comments
Color	White
Ra = Arithmetic Mean Roughness Value (µm)	0.25-0.35
Te Value (°C)	900

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