86-0731-89578196 [email protected]

Sapphire (Al2O3)

Sapphire (Al2O3)


Sapphire (Al2O3) single crystal is an excellent multifunctional materials. It is resistant to high temperature, and has good heat conduction, high hardness, transparent to infrared, stable chemically character. It is widely used in many fields of industry, defense and scientific research (such as high temperature infrared window), and also a widely used single crystal substrate material, which is the preferred substrate for the current blue, violet, white light emitting diode (LED) and blue laser (LD) industries (first need to extend the gallium nitride film on the sapphire substrate). It is also an important superconducting thin film substrate. In addition to making high-temperature superconducting films such as Y-series and La-series, it can also be used to grow new practical MgB2 (magnesium diboride) superconducting films.

Physical Properties

Material Al2O3
Crystal Structure Hexagonal
Lattice (A) a=4.758, c=12.992      
Crystal Purity >99.99%      
Density(g/cm3) 3.98 g/cm3      
Melting point 2040℃      
Hardness 9.0 (Mohns)      
Thermal expansion 7.5 (x 10-6/℃)
Thermal Conductivity 46.06 @ 0 oC     25.12 @ 100 oC,     12.56 @ 400 oC        ( W/(m.K) )
Dielectric constants  9.4 @300K  at A axis    ~ [email protected] 300K at C axis
Loss Tangent at 10 GHz < 2x10-5  at A axis ,       <5 x10-5  at C axis      


Size 10x3, 10x5, 10x10, 15x15, 20x15, 20x20,Dia15, Dia 20, Dia 1''
Thickness 0.5 mm, 1.0 mm
Polished SSP or DSP
Crystallographic D spacing (1120 ) - a plane:  2.379 Å          (1102) - r plane:  1.740 Å
(1010) - m plane:  1.375 Å         (1123) - n plane: 1.147 ů
(0001) - c plane:   2.165 Å          (1011) - s plane:  1.961 Å
Redirection precision ±0.5°
Redirection the edge 2°(special in 1°)
Angle of crystalline Special size and orientation are avaiable for request
Ra: ≤5Å(5µm×5µm)


100 clean bag, 1000 exactly clean room
Click for a downloadable datasheet on the Sapphire (Al2O3)
Can't find the downloadable datasheet you need? Click here to send email to get it.
Click here for answers to some of the most common questions we get asked.