CeramTec AT 79 Alumina, 99.6%

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CeramTec AT 79 Alumina, 99.6%
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Aluminas exhibit good mechanical properties such as hardness, compressive and tensile strength, and elastic modulus. They perform well at elevated temperatures.
Key Words:	Al2O3, aluminum oxide
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Physical Properties	Metric	English	Comments

Density	3.95 g/cc	0.143 lb/in³	DIN EN 623-2
Water Absorption	0.00 %	0.00 %	Open Porosity; DIN EN 623-2
Permeability	0.00	0.00	%, Gas
Weibull Modulus	14	14	DINV ENV 843-5

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	2110	2110	HV1; DINV ENV 843-4
Tensile Modulus	390 GPa	56600 ksi	Young's; DINV ENV 843-2
Flexural Strength	470 MPa	68200 psi	DIN EN 843-1
Compressive Strength	4000 MPa	580000 psi	DIN 51067T1
Poissons Ratio	0.23	0.23	DINV ENV 843-2
Fracture Toughness	4.00 MPa-m½	3.64 ksi-in½	K_IC (SEVNB); DIN CEN/TS 14425-1
Shear Modulus	159 GPa	23100 ksi	Calculated

Electrical Properties	Metric	English	Comments
Volume Resistivity	5.00e+8 ohm-cm @Temperature 400 °C	5.00e+8 ohm-cm @Temperature 752 °F	IEC 672-1
	5.00e+14 ohm-cm @Temperature 20.0 °C	5.00e+14 ohm-cm @Temperature 68.0 °F	IEC 672-1
Dielectric Constant	9.0 @Frequency 1e+6 Hz	9.0 @Frequency 1e+6 Hz	IEC 672-1
Dielectric Strength	18.0 kV/mm	457 kV/in	IEC 672-1
Dielectric Loss Index	0.0050 @Frequency 9.00e+9 Hz	0.0050 @Frequency 9.00e+9 Hz	IEC 672-1

Thermal Properties	Metric	English	Comments
CTE, linear	7.50 µm/m-°C @Temperature 20.0 - 100 °C	4.17 µin/in-°F @Temperature 68.0 - 212 °F	DIN EN 821-1
Specific Heat Capacity	0.900 J/g-°C	0.215 BTU/lb-°F	DINV ENV 821-3
Thermal Conductivity	30.0 W/m-K	208 BTU-in/hr-ft²-°F	DIN EN 821-2
Maximum Service Temperature, Air	1500 °C	2730 °F
Maximum Service Temperature, Inert	1500 °C	2730 °F

Component Elements Properties	Metric	English	Comments
Al2O3	99.6 %	99.6 %

Descriptive Properties
Ra = Arithmetic Mean Roughness Value (µm)	<0.1
Thermal Shock Resistance R1 (K)	127		calculated; 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 view all the property values for this datasheet as they were originally entered into MatWeb.

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CCERA905 / 107505

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