CeramTec V 679 Alumina, 99.7%

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CeramTec V 679 Alumina, 99.7%
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	3.90 g/cc	0.141 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	10	10	DINV ENV 843-5

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	1750	1750	HV1; DINV ENV 843-4
Tensile Modulus	390 GPa	56600 ksi	Young's; DINV ENV 843-2
Flexural Strength	300 MPa	43500 psi	DIN EN 843-1
Compressive Strength	2500 MPa	363000 psi	DIN 51067T1
Poissons Ratio	0.23	0.23	DINV ENV 843-2
Fracture Toughness	5.40 MPa-m½	4.91 ksi-in½	K_IC (SEVNB); DIN CEN/TS 14425-1
Shear Modulus	159 GPa	23100 ksi	Calculated

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+13 ohm-cm @Temperature 400 °C	1.00e+13 ohm-cm @Temperature 752 °F	IEC 672-1
	1.00e+14 ohm-cm @Temperature 20.0 °C	1.00e+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	30.0 kV/mm	762 kV/in	IEC 672-1
Dielectric Loss Index	0.0010 @Frequency 9.00e+9 Hz	0.0010 @Frequency 9.00e+9 Hz	IEC 672-1

Thermal Properties	Metric	English	Comments
CTE, linear	7.50 µm/m-°C @Temperature 20.0 - 400 °C	4.17 µin/in-°F @Temperature 68.0 - 752 °F	DIN EN 821-1
	8.50 µm/m-°C @Temperature 20.0 - 1000 °C	4.72 µin/in-°F @Temperature 68.0 - 1830 °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	99.7 %	99.7 %

Descriptive Properties
Ra = Arithmetic Mean Roughness Value (µm)	<0.1
Thermal Shock Resistance R1 (K)	79		calculated; R1 = [σ_s (1-µ)] / (α·E)

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CCERA904 / 107504

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