MarkeTech Sapphire (Aluminum Oxide - Al<sub>2</sub>O<sub>3</sub>) Single Crystal

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MarkeTech Sapphire (Aluminum Oxide - Al₂O₃) Single Crystal (discontinued **)
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Data provided by the supplier, MarkeTech International. Sapphire is grown by several methods: Boule form (Czochralski), in plate form, or as tubes, rods and plates. Boules are grown up to 8" diameter and 6" long. Plates can be formed up to 12" square and 1" thick. Rods and tubes can be grown up to 72" long. Sapphire is characterized by its high hardness (next to diamond on the Mohs scale), chemical and thermal stability, high application temperature, and transparency in the IR range. It is widely used as windows for instruments, high temperature parts, and wear resistance. Also used for deposition of III-V nitrides for LEDs, Lasers, etc. Standard orientation: <0001>; GaN Lattice Mismatch 14%. MarkeTech International is no longer in business.
Key Words:	Single Crystal Substrate, Al2O3
Vendors:

Available Properties

Density
Water Absorption
Solubility in Water
a Lattice Constant
c Lattice Constant
Molecular Weight
Knoop Microhardness, parallel to c-axis
Knoop Microhardness, perpendicular to c-axis
Hardness, Mohs
Tensile Strength
Tensile Strength
Tensile Strength
Modulus of Elasticity, 60° to C-axis
Modulus of Elasticity, 45° to C-axis
Modulus of Elasticity, 30° to C-axis
Modulus of Elasticity, 75° to C-axis
Modulus of Rupture
Flexural Strength
Bulk Modulus
Poissons Ratio
Coefficient of Friction, vs. self
Coefficient of Friction, vs. steel
Electrical Resistivity
Dielectric Constant, perpendicular to c-axis
Dielectric Constant, parallel to c-axis
Dielectric Strength
Dissipation Factor
CTE, linear, perpendicular to optical axis
CTE, linear, parallel to optical axis
CTE, linear, perpendicular to optical axis
CTE, linear, 60° to c-axis
CTE, linear, parallel to c-axis
Specific Heat Capacity
Specific Heat Capacity
Thermal Conductivity, perpendicular to c-axis
Thermal Conductivity, parallel to c-axis
Melting Point
Maximum Service Temperature, Air
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Refractive Index
Transmission, Visible, Visible
IR Transmittance
IR Transmittance
UV Transmittance
UV Transmittance
UV Transmittance
Reflection Coefficient, Visible (0-1), reflection loss, 2 surfaces

Property Data

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Manufacturer Notes:
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Category Notes
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**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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