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Crystals
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Sapphire Crystal  

 

 

Physical Properties:

        Density: 3.98 g/cm3, (0.143 lb/in3)
        Transmission range: 180nm-4500nm
        Thermal expansion coefficient:8.4×10-6/K
        Molecular Weight: 101.96 
        Hardness: Knoop microindenter: 2200 (perpendicular to c-axis), 1800 (parallel to c-axis) 
        Young's Modulus: 3.6 x 104 to 4.4 x 104 daN/mm2 
        Tensile Strength: 300 to 400 MPa 
        Point Group; Symmetry:3 2/m; [C,1A3, 3A2, 3P] 
        Lattice Dimensions: a = 4.748 Angstroms, c = 12.957 Angstroms 
        Sound Speed: ~10 km/s

 

 

Optical Properties:

        Refractive Indices: 
        Ordinary Ray (N0) (parallel to C-axis): 1.768 
        Extraordinary Ray (Ne) (perpendicular to C-axis): 1.760 
        Birefringence (Ne - N0): 0.008 
        Temperature Coefficient of Refractive Index: 13x10-6/℃ (@ 0.57 μm, 20℃) 
        Transmittance: >85% 0.3-4.0 μm (@ 0.1 mm thick) uncorrected 
        Emissivity @ 3,4,5 μm: 16%, 25%, 70% (@500℃) 
        Absorption @ 0.66 mm @ 1600℃: 0.1 - 0.2 cm-1

 

Optical Grade sapphire windows

Sapphire crystal retains its high strength at high temperatures, has good thermal properties and excellent transparency. Sapphire is aniso- tropic hexagonal crystal. The single crystal Sapphire is highly trusted material with its excellent chemical stability, mechanical property, and light transmission.

 

Capability:

Attribute

Commercial

High Precision

Material :

Optical Grade Single Crystal Sapphire

Orientation :

Random, C-axis , A-plane , R-plane and M-plane

Typical Diameterφ(mm)

4, 8, 12.7, 25.4, 30, 38, 50, 60

Typical Thickness(mm)

0.5, 1, 2, 3, 5, 10, 15, 20

Diameter Tolerance

± 0.1mm

± 0.02mm

Thickness Tolerance

± 0.1mm

± 0.02mm

Surface Quality

60-40 scratch and dig

20-10 scratch and dig

Parallelism

<3 arc minutes

<5 arc second

Bevel :

<0.25mm×45°

<0.25mm×45°

Note:Other sizes and coatings are available upon request.

 

 

IR and UV Quality sapphire windows

Sapphire crystal is extremely hard and scratch resistant useful for the visible and IR spectrum. It has excellent thermal conductivity at low temper-atures allowing sapphire to be used in many diverse fields requiring thermal conduction and heat radiation. Sapphire has high dielectric constant and is resistant to common chemical acids and alkaline. Optical sapphire has no colouration and with a selection of grades of sapphire transmission ranging from 180nm to 5 microns. Window shall not brown when subjected to UV Light.

 

Capability:

Attribute

Commercial

High Precision

Material

IR/UV Grade Single Crystal Sapphire

Orientation

Random, C-axis , A-plane , R-plane and M-plane

Typical Diameterφ(mm)

4, 8, 12.7, 25.4, 30, 38, 50, 60

Typical Thickness(mm)

0.5, 1, 2, 3, 5, 10, 15, 20

Diameter Tolerance

± 0.1mm

± 0.02mm

Thickness Tolerance

± 0.1mm

± 0.02mm

Surface Quality

80-50 scratch and dig

40-20 scratch and dig

Parallelism

<3 arc minutes

<30 arc second

Bevel

<0.25mm×45°

<0.25mm×45°

Note:Other sizes and coatings are available upon request.

 

 

Sapphire Prisms
 

 

There are many types of prisms, each having a particular geometry, used to achieve the reflections required to perform a specific imaging task. Refl-ecting prisms may invert, rotate, deviate or displace a beam. Dispersing prisms produce spectral separation for spectroscopic applications or tuning a laser output. The sapphire prisms are applied a lot to laser technology, optic-fiber communication, photoelectric transmission and image techno-logy .etc.

 

We can manufacture many types of high precision sapphire prisms, including right angle prism, penta prism, wedge prism, corner cube and custom shape prism . etc.

 

Capability:

Attribute

Commercial

High Precision

Material

Single Crystal Sapphire

Dimension Available

5mm~50mm

5mm~50mm

Thickness Available

0.5mm~20mm

0.5mm~20mm

Diameter Tolerance

± 0.2mm

± 0.02mm

Thickness Tolerance

± 0.2mm

± 0.02mm

Surface Quality

80-50 scratch and dig

40-20 scratch and dig

Deviation Tolerance

<5 arc minutes

<15 arc second

Bevel

<0.25mm×45°

<0.25mm×45°

 

 

 

Sapphire Scanner windows

Specifications:

Material :

Single Crystal Sapphire and EFG Growth

Width :

2 inch - 4 inch

Length :

2 inch - 8 inch

Thickness :

0.7mm - 5mm

Tolerance :

±0.01mm - ±0.2mm

Orientation :

Random, C-axis , A-plane , R-plane and M-plane

Surface Quality :

80-50 or 60-40 Scatch-dig

Bevel :

<0.25mm×45°

 

 

Sapphire Ribbons

Specifications:

Material :

Single Crystal Sapphire and EFG Growth

Width :

<4 inch

Length :

<7 inch

Thickness :

0.7mm - 8mm

Tolerance :

±0.01mm - ±0.2mm

Orientation :

Random, C-axis , A-plane , R-plane and M-plane

Surface Quality :

80-50 or 60-40 Scatch-dig

Bevel :

<0.25mm×45°

 

 

Sapphire Tubes and Rods

 

We can provides sapphire tubes and rods in various specification in accordance with customers request.

 

Sapphire Tubes

Material :

Single Crystal Sapphire and EFG Growth

Outside Diameter :

<52mm

Inside Diameter :

>0.1mm

Lengths :

<200mm

Tolerances :

>±0.01mm

Plumb Degree :

<10 arc minutes

Concentricity Tolerances :

±0.01mm - ±0.2mm

Surface Finish :

Ra 0.05μm to 1.0 μm, Fine ground

Sapphire Rods

Material :

Single Crystal Sapphire and EFG Growth

Diameter :

<26mm

Lengths :

<200mm

Tolerances :

>±0.01mm

Plumb Degree :

<10 arc minutes

Ellipse Degree :

<5μm

Surface Finish :

Ra 0.05μm to 1.0 μm, Fine ground

 

 

Sapphire wafer

The Sapphire wafer are utilized for various electronic and optical parts. Products such as Semiconductor Wafer Carriers; Electrical Insulators; Thin Film Deposition; Transparent Electronic Substrate; Silicon on Sapphire Wafers; Superconductor Substrate.etc.

Specifications:

Material :

Optical Grade Single Crystal Sapphire

Orientation :

Random, C-axis , A-plane , R-plane and M-plane

Diameter :

1″,2″,3″and 4″

Thickness :

0.15mm, 0.33mm, 0.43mm, 0.50mm

Tolerance :

±0.01mm - ±0.2mm

Surface Finish :

Epi-polished, Ra<0.3nm

   
 

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Tel:+86-(0)591-87846955 +86-(0)591-87846952 Fax: +86-(0)591-87856157 Website:www.phosctech.com E-mail: sales@phosctech.com