CeramTec Rubalit® A 1896 Alumina

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CeramTec Rubalit® A 1896 Alumina
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Rubalit® A 1896 (96%) is an aluminum oxide ceramic with an optimum price/performance ratio. Its outstanding properties are low density, low weight, high corrosion and wear resistance, excellent electrical insulation, and anti-friction properties for sliding materials such as sintered metal, carbon, and glass-fiber reinforced plastic. A polishing process opens the pores on the sliding surfaces, enabling the material to absorb lubricants and solid particles.
Key Words:	Al2O3, aluminum oxide
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Physical Properties	Original Value	Comments

Density	3.73 g/cc	DIN EN 623-2
Water Absorption	0.00 %	DIN EN 623-2
Porosity	5.0 %	closed (approximate vol. %)
Permeability	0.00	%, Gas
Weibull Modulus	>= 10	DINV ENV 843-5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1520	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	330 MPa	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	330 GPa	Young's; DINV ENV 843-2
Flexural Strength	330 MPa	DIN EN 843-1
Compressive Strength	3400 MPa	DIN 51067T1
Poissons Ratio	0.23	DINV ENV 843-2
Fracture Toughness	4.00 MPa-m½	K_IC; DIN 51109
Shear Modulus	134 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 1.00e+7 ohm-cm @Temperature 800 °C	IEC 672-1
	>= 1.00e+11 ohm-cm @Temperature 400 °C	IEC 672-1
	>= 1.00e+14 ohm-cm @Temperature 20.0 °C	IEC 672-1
Dielectric Constant	10 @Frequency 1e+7 Hz	IEC 672-1
Dielectric Strength	20.0 kV/mm	IEC 672-1
Dielectric Loss Index	0.0010 @Frequency 1e+7 Hz	IEC 672-1

Thermal Properties	Original Value	Comments
CTE, linear	5.40 µm/m-°C @Temperature 20.0 - 200 °C	DIN EN 821-1
	6.90 µm/m-°C @Temperature 20.0 - 400 °C	DIN EN 821-1
	7.50 µm/m-°C @Temperature 20.0 - 600 °C	DIN EN 821-1
	8.30 µm/m-°C @Temperature 20.0 - 1000 °C	DIN EN 821-1
Specific Heat Capacity	0.900 J/g-°C @Temperature 20.0 - 100 °C	DINV ENV 821-3
Thermal Conductivity	24.0 W/m-K @Temperature 20.0 - 100 °C	DIN EN 821-2
Maximum Service Temperature, Air	1450 °C
Maximum Service Temperature, Inert	1450 °C

Descriptive Properties
Color	White
Surface Contact Area (%)	60-80
Thermal Shock Resistance R1 (K)	118	R1 = [σ_s (1-µ)] / (α·E)

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 go back to viewing the property data in MatWeb's normal format.

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CCERA920 / 107520

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