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Wear Resistance Sapphire Wafer Sapphire Windows C-axis R-axis M-axis A-axis

Categories Sapphire Wafer
Brand Name: BonTek
Model Number: Sapphire (Al2O3)
Certification: ISO:9001
Place of Origin: China
MOQ: 5 Pieces
Price: Negotiable
Payment Terms: T/T
Supply Ability: 10000 pieces/Month
Delivery Time: 1-4 weeks
Packaging Details: Cassette, Jar, Film package
Material: Sapphire Wafer
Density: 3.97 g/cm3
Melting Point: 2040 degrees C
Thermal Conductivity: 27.21 W/(m x K) at 300 K
Thermal Expansion: 5.6 x 10 -6 /K (parallel C-axis) & 5.0 (perpendicular C-axis) x 10 -6 /K
Hardness: Knoop 2000 kg/mm 2 with 2000g indenter
Specific Heat Capacity: 419 J/(kg x K)
Dielectric Constant: 11.5 (parallel C-axis) 9.4 (perpendicular C-axis) at 1MHz
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Wear Resistance Sapphire Wafer Sapphire Windows C-axis R-axis M-axis A-axis

Wear Resistance Sapphire Wafer Sapphire Windows C-axis R-axis M-axis A-axis


Sapphire Windows are manufactured from single crystal sapphire, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamonds and, because of their structural strength, sapphire windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3), and is useful in a transmission range from 0.2 - 5.5µm.

Available orientations:

C-axis [0001], R-axis [1-102], A-axis [11-20], M-axis [10-10], Random

Sapphire windows / blanks


Diameter / Width:

25.0 - 250.0 mm

Tolerance:

Standard ± 2°, Special to ± 0.1°

Thickness:

Minimum 0.15, maximum 120.0 mm

Surface finish:

As cut, fine ground, lapped, polished s/d 80/50, 60/40, 40/20, 20/10, 10/5, according to the MIL-0-13830A

Ends / Edge quality:

Fine ground, 80/50

"As-grown" sapphire tubes:


Dimensions

Up to 50 mm inner diameter, 0,5 - 4,0 mm wall thickness, 300-600 mm tubes length

Orientation

C-axis in the length of the tube

Polished sapphire tubes:

Up to 50 mm inside diameter, 0,5 - 3,0 mm wall thickness, 80-350 mm tubes length

Ingots:

Diameter/Width 5-220 mm, Thickness/Length 25 – 125 mm

Surface quality

As-cut, Ends/Edge Quality Diamond cut



OPTICAL PROPERTIES of SAPPHIRE Al2O3

Transmission Range

0.17 to 5.5 microns

Refractive Index

1.75449 (o) 1.74663 (e) at 1.06 microns

Reflection Loss

at 1.06 microns (2 surfaces) for o-ray - 11.7%; for e-ray - 14.2%

Index of Absorption

0.3 x 10-3 cm-1 at 2.4 microns

dN/dT

13.7 x 10-6 at 5.4 microns

dn/dm = 0

1.5 microns


PHYSICAL PROPERTIES of SAPPHIRE Al2O3

Density

3.97 g/cm3

Melting Point

2040 degrees C

Thermal Conductivity

27.21 W/(m x K) at 300 K

Thermal Expansion

5.6 x 10 -6 /K (parallel C-axis) & 5.0 (perpendicular C-axis) x 10 -6 /K

Hardness

Knoop 2000 kg/mm 2 with 2000g indenter

Specific Heat Capacity

419 J/(kg x K)

Dielectric Constant

11.5 (parallel C-axis) 9.4 (perpendicular C-axis) at 1MHz

Young's Modulus (E)

335 GPa

Shear Modulus (G)

148.1 GPa

Bulk Modulus (K)

240 GPa

Elastic Coefficients

C11=496 C12=164 C13=115
C33=498 C44=148

Apparent Elastic Limit

275 MPa (40,000 psi)

Poisson Ratio

0.25



Acceptance Check


1. The product is fragile. We have adequately packed it and labeled it fragile. We deliver through excellent domestic and international express companies to ensure transportation quality.


2. After receiving the goods, please handle with care and check whether the outer carton is in good condition. Carefully open the outer carton and check whether the packing boxes are in alignment. Take a picture before you take them out.


3. Please open the vacuum package in a clean room when the products are to be applied.


4. If the products are found damaged during courier, please take a picture or record a video immediately. DO NOT take the damaged products out of the packaging box! Contact us immediately and we will solve the problem well.

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