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CeramTec Rubalit® 702 Alumina, 85%

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® 702 Alumina, 85%.pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

Rubalit® 702 is a high-performance material for the manufacturing of metal-film resistors. With an alumina content of 85%, it provides extreme hardness and high thermal conductivity. Practical applications have shown that Rubalit® 702 is capable of diffusing as much heat as the cap and film. Its extreme hardness necessitates laser trimming of the film material.

Physical Properties	Metric	English	Comments
Density	3.55 g/cc	0.128 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
Hardness, Rockwell 45 N	73	73	ASTM-E18
Vickers Microhardness	73	73	HV 0.5; DINV ENV 843-4
Flexural Strength	390 MPa	56600 psi	20 x 40 mm

Thermal Properties	Metric	English	Comments
CTE, linear	4.50 µm/m-°C @Temperature 20.0 - 100 °C	2.50 µin/in-°F @Temperature 68.0 - 212 °F	ASTM-C372
	6.20 µm/m-°C @Temperature 20.0 - 300 °C	3.44 µin/in-°F @Temperature 68.0 - 572 °F	ASTM-C372
	7.00 µm/m-°C @Temperature 20.0 - 600 °C	3.89 µin/in-°F @Temperature 68.0 - 1110 °F	ASTM-C372
	7.80 µm/m-°C @Temperature 20.0 - 1000 °C	4.33 µin/in-°F @Temperature 68.0 - 1830 °F	ASTM-C372
Thermal Conductivity	16.0 W/m-K	111 BTU-in/hr-ft²-°F	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1350 °C	2460 °F

Component Elements Properties	Metric	English	Comments
Al2O3	85 %	85 %

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+10 ohm-cm @Temperature 400 °C	1.00e+10 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 Constant	8.0 @Frequency 1.00e+6 Hz	8.0 @Frequency 1.00e+6 Hz	IEC 672-1 / ASTM-C150
Dielectric Strength	>= 10.0 kV/mm	>= 254 kV/in	ASTM-D150
Dielectric Loss Index	0.0010 @Frequency 1.00e+6 Hz	0.0010 @Frequency 1.00e+6 Hz	IEC 672-1 / ASTM-D149,150

Descriptive Properties	Value	Comments
Color	White
Ra = Arithmetic Mean Roughness Value (µm)	0.2-0.3
Te Value (°C)	850

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