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CeramTec Rubalit® A 1999.5 Alumina, 99.7%

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® A 1999.5 Alumina, 99.7%.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

Rubalit® A 1999.5 (99.7%) is mechanically stronger, features a higher heat conductivity, and is more corrosion resistant than other aluminas. This high-purity aluminum oxide ceramic with carbon materials is especially suitable for plain bearings and seal rings.

Physical Properties	Metric	English	Comments
Density	3.88 g/cc	0.140 lb/in³	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	0.00 %	0.00 %	DIN EN 623-2 / ASTM-C373
Permeability	0.00	0.00	Gas
Weibull Modulus	>= 13	>= 13	DINV ENV 843-5

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	1600	1600	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	380 MPa	55100 psi	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	350 GPa	50800 ksi	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	380 MPa	55100 psi	DIN EN 843-1
	400 MPa	58000 psi	Bending Strength; 4-Point Method (40x4x3 mm³); ASTM-F417
Compressive Strength	4000 MPa	580000 psi	ASTM C-773-88 / DIN 51067T1
Poissons Ratio	0.23	0.23	DINV ENV 843-2
Fracture Toughness	4.00 MPa-m½	3.64 ksi-in½	DIN 51109
Shear Modulus	142 GPa	20600 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	7.50 µm/m-°C @Temperature 20.0 - 200 °C	4.17 µin/in-°F @Temperature 68.0 - 392 °F	DIN EN 821-1
	7.50 µm/m-°C @Temperature 20.0 - 400 °C	4.17 µin/in-°F @Temperature 68.0 - 752 °F	DIN EN 821-1
	7.50 µm/m-°C @Temperature 20.0 - 600 °C	4.17 µin/in-°F @Temperature 68.0 - 1110 °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 @Temperature 100 - 200 °C	0.215 BTU/lb-°F @Temperature 212 - 392 °F	DINV ENV 821-3
Thermal Conductivity	30.0 W/m-K	208 BTU-in/hr-ft²-°F	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1400 °C	2550 °F
Maximum Service Temperature, Inert	1400 °C	2550 °F

Component Elements Properties	Metric	English	Comments
Al2O3	99.7 %	99.7 %

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+7 ohm-cm @Temperature 800 °C	>= 1.00e+7 ohm-cm @Temperature 1470 °F	IEC 672-1
	>= 1.00e+12 ohm-cm @Temperature 400 °C	>= 1.00e+12 ohm-cm @Temperature 752 °F	IEC 672-1
	>= 1.00e+15 ohm-cm @Temperature 20.0 °C	>= 1.00e+15 ohm-cm @Temperature 68.0 °F	IEC 672-1
Dielectric Constant	10 @Frequency 1.00e+7 Hz	10 @Frequency 1.00e+7 Hz	IEC 672-1 / ASTM-C150
Dielectric Strength	30.0 kV/mm	762 kV/in	6.35 mm (1/4") IEC 672-1
Dielectric Loss Index	0.00050 @Frequency 1.00e+6 Hz	0.00050 @Frequency 1.00e+6 Hz	IEC 672-1 / ASTM-D149,150

Descriptive Properties	Value	Comments
Ra = Arithmetic Mean Roughness Value (µm)	Profilometer (0.8 mm Cutoff)
Surface Contact Area (%)	80-95
Thermal Shock Resistance R1 (K)	150	Hasselman (Experimental)

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