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Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod
  • Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod
  • Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod
  • Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod

Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod

Place of Origin china
Brand Name zmkj
Model Number seed rod
Product Details
99.999% Al2O3
Semicondutor Wafer, Led Chip, Optical Glass Window, Electronic Ceramics,bearing
High Hardness9.0,wear Resistance,
VisVisible Light TransmittanceVisible Light Transmittance:
Red And White
Single Crystal
Rod And Square Rod
High Light: 

sapphire tube


sapphire windows

Product Description

sapphire seed rod for sapphire crystal growing , Al2O3 single crystal glass ,sapphire optical glass ingots, 20x20mm  customized sapphire optical rods,sapphire optical stick,Al2O3 single crystal glass lens,optical glass ingots by sapphire , polished sapphire optical rods 

Commen Specification for Sapphire Seed Rods

Diameter 0.2-300mm or customization(20x20mm,10x10mml,dia20mm)
Diameter tolerance +/-0.1mm to +/-0.01mm
Thickness 0.10-100mm(150mm)
Thickness tolerance ± 0.1mm or +/-0.01mm
Surface quality (scratch & dig) 60/40, 40/20 or better20/10
Surface accuracy λ/10, λ/2, λ
Clear Aperture >85%, >90%
Parallelism +/-3' ,+/-30''
Bevel 0.1~0.3mm×45 degree

where is sapphire from?

Synthetic Sapphire is a single crystal form of corundum, Al2O3, also known as alpha-alumina, alumina,Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod 0

and single crystal Al2O3. Sapphire is aluminium oxide in the purest form with no porosity or grain boundaries, making it theoretically dense. The combination of favourable chemical, electrical, mechanical, optical, surface, thermal, and durability properties make sapphire a preferred material for high performance system and component designs. For various semiconductor applications, sapphire is the best choice in comparison with other synthetic single-crystals.


Main properties of sapphire:

Chemical formula Al2O3
Crystal class Hexagonal system, rhomboidal class 3m
Lattice constants, A a=4.785, c=12.991
Density, g/cm3 3.98
Melting point, °K 2303
Hardness Knoop(daN/mm2): 1800 parallel to C-axis, 2200 perpendicular to C-axis, Mohs: 9
Optical transmission range, µm 0.17 - 5.5
Refractive index at 0.532 µm n0=1.7717, ne=1.76355
Water absorption nil
Young Modulus, Gpa 345
Shear Modulus, Gpa 145
Bulk Modulus, Gpa 240
Bending Modulus (Modulus of Rupture), Mpa 420 at 20°C, 280 at 500°C
Elastic Coefficient C11=496, C12=164, C13=115, C33=498, C44=148
Poisson ratio 0.25-0.30
Friction Coefficient 0.15 on steel, 0.10 on sapphire
Tensile strength, MPa 400 at 25°, 275 at 500°, 345 at 1000°
Flexural strength, daN/mm2 35 to 39
Compressive strength, GPa 2.0
Young’s modulus E, daN/mm2 3.6 x 104 to 4.4 x 104
Specific heat, J/(kg x K) 105 at 91°K, 761 at 291°K
Thermal coefficient of linear expansion, K-1,at 323K 6.66 x 10-6 parallel to optical axis, 5 x 10-6 perpendicular to optical axis
Thermal conductivity, W/(m x K) at 300K 23.1 parallel to optical axis, 25.2 perpendicular to optical axis
Resistivity, Ohm x cm 1016 (25°), 1011 (500°), 106 (1000°)
Dielectric constant 11.5 (103 - 109 Hz, 25°) parallel to C-axis, 9.3 (103 - 109 Hz, 25°) perpendicular to C-axis
Dielectric strength, V/cm 4 x 105
Loss tangent 1 x 10-4
-in water
-in HNO3,H2SO4, HCl, HF
-in alcalis
-in melts of metals Mg, Al, Cr, Co, Ni, Na, K, Bi, Zn, Cs

insoluble to 300°C
insoluble to 800°C
insoluble to 800-1000°C
g -radiation stability No change in transmission above 2.5 mm after exposure to 107 Rads. No visible coloration after exposure to 108 Rads/hr for 60 minutes at - 195°C
Proton radiation stability No change in transmission below 0.3 µm after exposure to 1012 proton/cm2 total dose
Chemical resistance
Sapphire is highly inert and resistant to attack in most process environments including hydrofluoric acid and the fluorine plasma applications commonly found in semiconductor wafer processing (NF3, CF4)


what is advantagement of sapphire? 

1-Thinner and Stronger than Standard Glass Windows
2-Transmits Wavelengths Ranging From UV to Mid-Infrared

3-Features Extreme Surface Hardness and Chemical Resistance

what is applications for sapphire ?

Sapphire substrates / wafers: EPI-polished, optically polished, lapped or as-cut sapphire disks,

windows, substrates, blanks as well as epitaxial structures “silicon-on-sapphire” (SOS) .

  • LED Substrates/ cooling Submount  for Led tube 
  • glass cover for camera,phone, fingerprint identification,watch screem other consumer electronics.
  • medcine usd as like sapphire blade,Bacterial culture substrate,laser leading block.
  • Optical glass lens for windows, in high temperature 
  • sapphire bearing ,sapphire ball


3.0 sample


Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod 1


4.We can supply professional customized service in time and provide cooperation

and support of new product development and technology appliance including other

semiconductor materials wafers and optical lens as like~

Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod 2

5.0 packing & delivery

Lapped Surface Custom Sapphire Parts , Polished Synthetic Sapphire Rod 3


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