Sapphire Optical Crystals

Sapphire optical crystals Single crystal sapphirehas a unique combination of physical, chemical and optical properties allowing it to withstand high temperatures, high pressure, thermal shock, and water or sand erosion. It is chemically inert, with a low friction coefficient, and excellent.

Product Details


Description:

Sapphire crystal is an excellent multifunctional material widely used in industry, national defense, and aerospace. It has high-temperature resistance up to 2000 ,good thermal conductivity, high hardness (Morse 9th) and good chemical stability. Usually, this material is used for high-temperature resistant infrared window, solid laser, precision wear-resisting bearings. It is also widely applied in crystal substrate, especially for blue, purple, white light-emitting diodes (LED) and blue light laser (LD). As the hardest material among all oxide crystals, Sapphire has a combination of good optical and physical properties, which even maintains at high temperature, making it the best choice for a variety of demanding applications. 

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Features  

◆ Extreme surface hardness

◆ High-temperature resistance

◆ Good thermal properties

◆ Excellent electric and dielectric properties and chemical resistance

◆ Transmitting wavelength ranging from UV to Mid-Infrared

Applications

◆  Thin and high-strength window

◆  Optical substrates and window

◆  Transparent electronic substrate

◆  High-temperature and pressure window

◆  Right angle prism


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Transmittance of Sapphire crystal 

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Polishing specifications

Surface flatness

<λ/8 @632nm

Clear Aperture

>90%

Orientation Tolerence

<0.5°

Thickness/Aperture Tolerance

±0.1 mm

Parallel

10〞

Perpendicular

Surface quality

10/5 (Scratch/Dig)

Chamfer

<0.2×45°

Wavefront distorsion

<λ/8@632 nm

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Physical and chemical properties

Property

Value

Chemical composition

Lu3Al5O12

Melting (℃)

2020℃

Symmetry

Cubic

Structure

Ia3d

Cell parameters (Å)

11.914

Hardness

8.5

Density (g/cm3)

6.73

Thermal conductivity (W/(℃.cm))

0.08 @ 25℃

expanding coefficient (10-6/℃)

8.8

Refractive index (λ=550nm)

1.84

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Scintillation properties

Emission peak (nm)

510

Light yield (Photons/Mev)

15000

Relative light output (%NaI:Tl)

20

Decay time (ns)

80

Radiation length for 511 keV (cm)

1.3

Energy resolution

<8%

Zeff

63

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Standard product

  Length (mm)

  Diameter (mm)

          Light yield (photons/Mev)

up to 150mm

up to 80mm

15000



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