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CoorsTek AD-998 Alumina(nom. 99.8% Al2O3)

Category	Ceramic , Oxide , Aluminum Oxide
Manufacturer	CoorsTek
Trade Name
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	CoorsTek AD-998 Alumina(nom. 99.8% Al2O3).pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

Thermal Shock Delta Tc = 200°C - Thermal shock tests are performed by quenching samples in water from different elevated temperatures. Delta Tc is the change in temperature which results in a sharp decrease in the flexural strength of the sample.Corrosion: Although all Coors Ceramics are highly resistant to chemical attack, Coors recommends obtaining specific application data from Coors before design finalization.Data Provided by the manufacturer, Coors Ceramics Co.

Physical Properties	Metric	English	Comments
Density	3.92 g/cc	0.142 lb/in³	ASTM C20
Water Absorption	0.00 %	0.00 %	ASTM C373
Particle Size	6.0 µm	6.0 µm	Average Crystal Size - Thin Section Test

Mechanical Properties	Metric	English	Comments
Knoop Microhardness	14.1	14.1	1000 g load
Hardness, Rockwell 45 N	83	83	GPa
Tensile Strength, Ultimate	248 MPa	36000 psi	ACMA Test #4
Modulus of Elasticity	370 GPa	53700 ksi	ASTM C848
Flexural Strength	375 MPa	54400 psi	ASTM F417
Compressive Strength	2500 MPa	363000 psi	ASTM C773
Poissons Ratio	0.22	0.22	ASTM C848
Fracture Toughness	4.00 - 5.00 MPa-m½	3.64 - 4.55 ksi-in½
Shear Modulus	152 GPa	22000 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	8.20 µm/m-°C @Temperature 25.0 - 1000 °C	4.56 µin/in-°F @Temperature 77.0 - 1830 °F	ASTM C372
Specific Heat Capacity	0.880 J/g-°C	0.210 BTU/lb-°F	ASTM E1269
Thermal Conductivity	30.0 W/m-K	208 BTU-in/hr-ft²-°F	ASTM C408
Maximum Service Temperature, Air	1750 °C	3180 °F	No Load

Electrical Properties	Metric	English	Comments
Electrical Resistivity	>= 1.00e+14 ohm-cm	>= 1.00e+14 ohm-cm	ASTM D1829
	5.00e+7 ohm-cm @Temperature 1000 °C	5.00e+7 ohm-cm @Temperature 1830 °F	ASTM D1829
	2.00e+10 ohm-cm @Temperature 500 °C	2.00e+10 ohm-cm @Temperature 932 °F	ASTM D1829
Dielectric Constant	9.8 @Frequency 1e+6 Hz	9.8 @Frequency 1e+6 Hz
Dielectric Strength	8.70 kV/mm	221 kV/in	ac; ASTM D116
Dielectric Loss Index	0.0010	0.0010	at 25°C, 1 MHz; ASTM D2520

Descriptive Properties	Value	Comments
Color	Ivory

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