CeramTec ZN 40 Zirconia, ZrO2-MgO

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CeramTec ZN 40 Zirconia, ZrO2-MgO
Categories:	Ceramic; Oxide; Zirconium Oxide
Material Notes:	ZN 40 is a zirconium oxide ceramic with an excellent surface finish and a higher strength than aluminum oxide. Its good crack resistance and anti-friction properties, combined with steel-like thermal expansion attributes, make this material an ideal partner for bearing composites working at elevated temperatures.
Key Words:	Zirconium Oxide
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Physical Properties	Original Value	Comments

Density	5.74 g/cc	DIN EN 623-2
Water Absorption	0.00 %	Open Porosity; DIN EN 623-2
Permeability	0.00	%, Gas
Weibull Modulus	25	DINV ENV 843-5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1240	HV1; DINV ENV 843-4
Tensile Strength at Break	500 MPa	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	210 GPa	Young's; DINV ENV 843-2
Flexural Strength	500 MPa	DIN EN 843-1
Compressive Strength	1600 MPa	DIN 51067T1
Poissons Ratio	0.30	DINV ENV 843-2
Fracture Toughness	8.10 MPa-m½	K_IC (SEVNB); DIN CEN/TS 14425-1
Shear Modulus	80.8 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	500000 ohm-cm @Temperature 400 °C	IEC 672-1
	5.00e+13 ohm-cm @Temperature 20.0 °C	IEC 672-1
Dielectric Constant	27 @Frequency 1e+6 Hz	IEC 672-1
Dielectric Strength	19.0 kV/mm	IEC 672-1
Dielectric Loss Index	0.020 @Frequency 9.00e+9 Hz	IEC 672-1

Thermal Properties	Original Value	Comments
CTE, linear	10.2 µm/m-°C @Temperature 20.0 - 400 °C	DIN EN 821-1
	11.0 µm/m-°C @Temperature 20.0 - 1000 °C	DIN EN 821-1
Specific Heat Capacity	0.400 J/g-°C	DINV ENV 821-3
Thermal Conductivity	3.00 W/m-K	DIN EN 821-2
Maximum Service Temperature, Air	850 °C
Maximum Service Temperature, Inert	850 °C

Descriptive Properties
Ra = Arithmetic Mean Roughness Value (µm)	<0.06
Thermal Shock Resistance R1 (K)	163	calculated; R1 = [σ_s (1-µ)] / (α·E)

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CCERA909 / 107509

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