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CeramTec 975 Alumina, 99.5%

Category	Ceramic , Oxide , Aluminum Oxide
Manufacturer	CeramTec North America
Trade Name
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	CeramTec 975 Alumina, 99.5%.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

975 (99.5%) offers unique technology by virtue of its optimal dispersion of the MgO phase with the alumina grains. With virtually no transgranular porosity in its microstructure, 975 exhibits high density, superior wear resistance, and moderate flexural strength. Another advantage is its highly uniform white color compared to conventional 99.5% aluminas. The material’s white color remains consistent under either reducing or oxidizing conditions. It can be used for ballistic protection and ceramic armor.

Physical Properties	Metric	English	Comments
Density	3.90 g/cc	0.141 lb/in³	DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption	0.00 %	0.00 %	DIN EN 623-2 / ASTM-C373
Particle Size	2.0 - 3.0 µm	2.0 - 3.0 µm	Median Grain (d50)

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	1700	1700	HV 0.5; DINV ENV 843-4
Tensile Strength at Break	172 MPa	24900 psi	ACMA Test #4 / DIN EN 843-1
Tensile Modulus	380 GPa	55100 ksi	Young's; DINV ENV 843-2 / ASTM-F417
Flexural Strength	310 MPa	45000 psi	20 x 40 mm
Compressive Strength	2400 MPa	348000 psi	ASTM C-773-88 / DIN 51067T1
Poissons Ratio	0.30	0.30	DINV ENV 843-2
Fracture Toughness	4.00 MPa-m½	3.64 ksi-in½	DIN 51109
Shear Modulus	131 GPa	19000 ksi

Thermal Properties	Metric	English	Comments
CTE, linear	7.30 µm/m-°C	4.06 µin/in-°F	DIN EN 821-1
	5.60 µm/m-°C @Temperature 20.0 - 200 °C	3.11 µin/in-°F @Temperature 68.0 - 392 °F
	7.00 µm/m-°C @Temperature 20.0 - 600 °C	3.89 µin/in-°F @Temperature 68.0 - 1110 °F	ASTM-C373
	8.00 µm/m-°C @Temperature 20.0 - 1000 °C	4.44 µin/in-°F @Temperature 68.0 - 1830 °F
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	35.4 W/m-K	246 BTU-in/hr-ft²-°F	DIN EN 821-2 / ASTM-C408
Maximum Service Temperature, Air	1530 °C	2790 °F

Component Elements Properties	Metric	English	Comments
Al2O3	99.5 %	99.5 %

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+14 ohm-cm	>= 1.00e+14 ohm-cm	ASTM-D257
Dielectric Constant	10 @Frequency 1.00e+6 Hz	10 @Frequency 1.00e+6 Hz	IEC 672-1 / ASTM-C150
Dielectric Strength	7.874 kV/mm	200.0 kV/in	6.35 mm (1/4") IEC 672-1
Dissipation Factor	0.00010 @Frequency 1.00e+6 Hz	0.00010 @Frequency 1.00e+6 Hz
Dielectric Loss Index	0.0010 @Frequency 1.00e+6 Hz	0.0010 @Frequency 1.00e+6 Hz	IEC 672-1 / ASTM-D149,150

Descriptive Properties	Value	Comments
Color	White
Thermal Shock Resistance R1 (K)	225	Hasselman (Experimental)

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