85% Alumina, vitreous body

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85% Alumina, vitreous body
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Fair Thermal Shock resistance, T_c value = 750-1000°C (1380-1830°F).
Key Words:	aluminum oxide
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Physical Properties	Metric	English	Comments

Density	3.40 - 3.53 g/cc	0.123 - 0.128 lb/in³
Water Absorption	0.00 - 0.020 %	0.00 - 0.020 %	24 hrs.
Open Porosity	<= 1.0 %	<= 1.0 %	Hermetic (helium mass spectrometer test on 0.254 mm (0.010 in) sections)

Mechanical Properties	Metric	English	Comments
Knoop Microhardness	1450	1450
Hardness, Mohs	8.5 - 9.0	8.5 - 9.0
Tensile Strength, Ultimate	115 - 160 MPa	16700 - 23200 psi
Modulus of Elasticity	215 - 240 GPa	31200 - 34800 ksi
Flexural Strength	205 - 310 MPa	29700 - 45000 psi
Compressive Strength	965 - 2760 MPa	140000 - 400000 psi
Charpy Impact	0.660 - 0.790 J	0.487 - 0.583 ft-lb

Electrical Properties	Metric	English	Comments
Electrical Resistivity	400000 - 500000 ohm-cm @Temperature 900 °C	400000 - 500000 ohm-cm @Temperature 1650 °F
	1.00e+8 - 7.50e+9 ohm-cm @Temperature 500 °C	1.00e+8 - 7.50e+9 ohm-cm @Temperature 932 °F
	2.00e+13 - 7.50e+13 ohm-cm @Temperature 100 °C	2.00e+13 - 7.50e+13 ohm-cm @Temperature 212 °F
	1.00e+14 - 3.60e+14 ohm-cm @Temperature 25.0 °C	1.00e+14 - 3.60e+14 ohm-cm @Temperature 77.0 °F
Dielectric Strength	8.07 - 13.8 kV/mm	205 - 351 kV/in	AC

Thermal Properties	Metric	English	Comments
CTE, linear	5.47 - 5.68 µm/m-°C @Temperature 25.0 - 200 °C	3.04 - 3.16 µin/in-°F @Temperature 77.0 - 392 °F
	6.55 - 6.96 µm/m-°C @Temperature 25.0 - 600 °C	3.64 - 3.87 µin/in-°F @Temperature 77.0 - 1110 °F
	7.33 µm/m-°C @Temperature 25.0 - 800 °C	4.07 µin/in-°F @Temperature 77.0 - 1470 °F
	7.60 - 7.90 µm/m-°C @Temperature 25.0 - 700 °C	4.22 - 4.39 µin/in-°F @Temperature 77.0 - 1290 °F
	7.67 - 7.89 µm/m-°C @Temperature 25.0 - 1000 °C	4.26 - 4.38 µin/in-°F @Temperature 77.0 - 1830 °F
Specific Heat Capacity	0.419 J/g-°C	0.100 BTU/lb-°F
Thermal Conductivity	13.0 - 17.0 W/m-K @Temperature 38.0 °C	90.2 - 118 BTU-in/hr-ft²-°F @Temperature 100 °F
	26.0 W/m-K @Temperature 425 °C	180 BTU-in/hr-ft²-°F @Temperature 797 °F
	33.0 W/m-K @Temperature 870 °C	229 BTU-in/hr-ft²-°F @Temperature 1600 °F
Maximum Service Temperature, Air	1200 - 1400 °C	2190 - 2550 °F	maximum working temperature

Component Elements Properties	Metric	English	Comments
Al2O3	85 %	85 %

References for this datasheet.

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BA2C / 137

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