High Purity Sapphire Crystal Watch Face Customized Size Polished Surface
Properties of sapphire Physical Chemical formula Al2O3 […]
Properties of sapphire
| Physical | |
| Chemical formula | Al2O3 |
| Density | 3.97 g/cm3 |
| Hardness | 9 Mohs |
| Melting point | 2050oC |
| Max. use temperature | 1800-1900oC |
| Mechanical | |
| Tensile strength | 250-400 MPa |
| Compressive strength | 2000 MPa |
| Poisson’s ratio | 0.25-0.30 |
| Young’s Modulus | 350-400 GPa |
| Bending strength | 450-860 MPa |
| Rapture Modulus | 350-690 MPa |
| Thermal | |
| Linear expansion rate (at 293-323 K) | 5.0*10-6K-1(⊥ C) |
| 6.6*10-6K-1(∥ C) | |
| Thermal conductivity (at 298 K) | 30.3 W/(m*K)(⊥ C) |
| 32.5 W/(m*K)(∥ C) | |
| Specific heat (at 298 K) | 0.10 cal*g-1 |
| Electrical | |
| Resistivity (at 298 K) | 5.0*1018 Ω*cm(⊥ C) |
| 1.3-2.9*1019 Ω*cm(∥ C) | |
| Dielectric constant (at 298 K, in 103-109 Hz interval) | 9.3 (⊥ C) |
| 11.5 (∥ C) |
The Advantage of Sapphire Crystal Glass
– High hardness – 9H
– Scratch resistance
– Abrasion resistance
– High mechanical strength
– High temperature resistance
– Good thermal stability
– High optical production rate
Sapphire Glass
Synthetic sapphire is transparent single crystal 99.99% pure Al2O3 that exhibits a unique combination of physical, chemical, electrical and optical properties: high thermal conductivity, high strength and scratch resistance, hardness (9 on the Mohs scale), transparent in wide range of wavelength, chemical inertness.
High crystal perfection, low reactivity, and appropriate unit cell size make sapphire an excellent substrate in the semiconductor industry for blue light-emitting diodes (LED).
Since Nobel Laureate in Physics Shuji Nakamura used the sapphire substrate in 1990s for LED, the demand of sapphire crystal has been growing rapidly.
It drives development of new markets like general lighting, backside lighting in TV-sets, displays, consumer appliances, aerospace and defense, and other applications
Sapphire Applications
- Substrates for LED manufacturing
- Viewports for vacuum/high temperature/pressure chamber of furnaces, semiconductor equipment etc.
- Watch glasses/Windows for bar code reader
- Phone, smartphone, smart watch cover screens
- Polarized windows for LCD projectors/Xenon lamp windows
- Components for infrared optics
- Thermocouples protection NMR tubes
- Tubes for plasma etching process in semiconductor industry
- HPLH pistons /Light guide for thermometry
- Dosing and filling pumps in pharmaceutical, cosmetic and food industries.
- Medical implants/Endoscope lenses
Q1: How can I get the price and consult for product details?
A1: Send enquiry via Email, Skype, Wechat or Call us directly.
Q2: What is your main product? OEM/ODM ?
A2:Thermal interface material, Sapphire Glass products, Die cut service for industrial etc.
&OEM/ODM is available. For details, please kindly contact the sales persons.
Q3: What is your service?
A3: 24 hours online service is our promise.
Q4: How is your quality of products and quality guarantee policy?
A2: 100% full test before shipping and 100% compliance with the request of clients.
Q4: What is the payment method?
A3: T/T, Western Union, L/C, Paypal,Etc.
Q5: What is the delivery time?
A5: Normally 20-40 working days after payment received. But it depends on exactly situation.
Q6: What package do you use for the products?
A6: Safe and standard packing for export shipment (PE film cover, kraft paper/bubble bags parcel, and pack into carton or wooden box).
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