CoorsTek AD-995-I4 Min. 99.5% Al 2 O 3

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CoorsTek AD-995-I4 Min. 99.5% Al₂O₃
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Information provided by CoorsTek.
Key Words:	Al2O3, alumina
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Physical Properties	Metric	English	Comments

Density	3.90 g/cc	0.141 lb/in³	ASTM-C20
Grain Size	6.0 µm	6.0 µm	ASTM-E112
	0.50 - 35 µm	0.50 - 35 µm	ASTM-E112

Mechanical Properties	Metric	English	Comments
Hardness, Vickers	16 @Load 0.500 kg	16 @Load 1.10 lb	ASTM-C1327
	16 @Load 1.00 kg	16 @Load 2.20 lb	ASTM-C1327
Modulus of Elasticity	380 GPa	55100 ksi	ASTM-C848
Flexural Strength	320 MPa	46400 psi	4-Point; ASTM-C1161
	380 MPa	55100 psi	3-Point; ASTM-C1161
Poissons Ratio	0.22	0.22	ASTM-C848
Fracture Toughness	4.00 - 5.00 MPa-m½	3.64 - 4.55 ksi-in½	K_IC; KNOOP 1000 gm

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+7 ohm-cm @Temperature 1000 °C	1.00e+7 ohm-cm @Temperature 1830 °F	ASTM-D1829
	2.00e+9 ohm-cm @Temperature 600 °C	2.00e+9 ohm-cm @Temperature 1110 °F	ASTM-D1829
	1.00e+11 ohm-cm @Temperature 500 °C	1.00e+11 ohm-cm @Temperature 932 °F	ASTM-D1829
	5.00e+12 ohm-cm @Temperature 300 °C	5.00e+12 ohm-cm @Temperature 572 °F	ASTM-D1829
	>= 1.00e+14 ohm-cm @Temperature 25.0 °C	>= 1.00e+14 ohm-cm @Temperature 77.0 °F	ASTM-D1829
Dielectric Constant	9.8 @Frequency 1e+6 Hz	9.8 @Frequency 1e+6 Hz	ASTM-D150
	9.8 @Frequency 5.00e+9 Hz	9.8 @Frequency 5.00e+9 Hz	TE₀₁₁ Resonant Mode
Dielectric Strength	15.7 kV/mm @Thickness 1.00 mm	400 kV/in @Thickness 0.0394 in	ASTM-D116
Dissipation Factor	0.00020 @Frequency 1e+6 Hz	0.00020 @Frequency 1e+6 Hz	ASTM-D150
	0.00020 @Frequency 5.00e+9 Hz	0.00020 @Frequency 5.00e+9 Hz	TE₀₁₁ Resonant Mode

Thermal Properties	Metric	English	Comments
CTE, linear	7.00 µm/m-°C @Temperature 400 °C	3.89 µin/in-°F @Temperature 752 °F	ASTM-C372
	8.00 µm/m-°C @Temperature 800 °C	4.44 µin/in-°F @Temperature 1470 °F	ASTM-C372
	8.20 µm/m-°C @Temperature 1000 °C	4.56 µin/in-°F @Temperature 1830 °F	ASTM-C372
Specific Heat Capacity	0.800 J/g-°C	0.191 BTU/lb-°F	ASTM-E1269
Thermal Conductivity	30.0 W/m-K	208 BTU-in/hr-ft²-°F	ASTM-C408

Component Elements Properties	Metric	English	Comments
Al2O3	>= 99.5 %	>= 99.5 %
Iron, Fe	<= 0.0060 %	<= 0.0060 %	in Sintered Material per Glow Discharge Mass Spec
Magnesium, Mg	<= 0.050 %	<= 0.050 %	in Sintered Material per Glow Discharge Mass Spec
Other, total	<= 0.25 %	<= 0.25 %	in Sintered Material per Glow Discharge Mass Spec
Silicon, Si	<= 0.040 %	<= 0.040 %	in Sintered Material per Glow Discharge Mass Spec
Sodium, Na	<= 0.020 %	<= 0.020 %	in Sintered Material per Glow Discharge Mass Spec

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CCOOR820 / 254568

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