Customized Sapphire Glass Window Transparent White Polished Surface High Purity

Basic Information
Place of Origin: CHINA
Brand Name: zmkj
Model Number: white sapphire watch case
Minimum Order Quantity: 10PCS
Price: by case
Packaging Details: standard plastic case
Delivery Time: 4-6weeks
Payment Terms: T/T, Western Union
Supply Ability: 500pcs per month
Material: Doped Sapphire Crystal Al2O3 Crystal Color: White
Size: Customzied Surface: Polished
Character: Wear-resisting Purity: 99.99%
Orientation: (0001)
High Light:

custom sapphire watch crystal


scratch proof watch glass

Blue/ Green/ Pink/ Red/ White Sapphire single crystal watch glass case/ Sapphire optical glass for watch lens

Sapphire Glass


About synthetic sapphire crystal

The Kyropoulos process (KY process) for sapphire crystal growth is currently used by many companies in China to produce sapphire for the electronics and optics industries.
High-purity, aluminum oxide is melted in a crucible at over 2100 degrees Celsius. Typically the crucible is made of tungsten or molybdenum. A precisely oriented seed crystal is dipped into the molten alumina. The seed crystal is slowly pulled upwards and may be rotated simultaneously. By precisely controlling the temperature gradients, rate of pulling and rate of temperature decrease, it is possible to produce a large, single-crystal, roughly cylindrical ingot from the melt.
After single crystal sapphire boules are grown, they are core-drilled into cylindrical rods, The rods are sliced up into the desired window thickness and finally polished to the desired surface finish.
Use as substrate for semiconducting circuits
Thin sapphire wafers were the first successful use of an insulating substrate upon which to deposit silicon to make the integrated circuits known as silicon on sapphire or "SOS", Besides its excellent electrical insulating properties, sapphire has high thermal conductivity. CMOS chips on sapphire are especially useful for high-power radio-frequency (RF) applications such as those found in cellular telephones, public-safety band radios, and satellite communication systems.
Wafers of single-crystal sapphire are also used in the semiconductor industry as substrates for the growth of devices based on gallium nitride (GaN). The use of sapphire significantly reduces the cost, because it has about one-seventh the cost of germanium. Gallium nitride on sapphire is commonly used in blue light-emitting diodes (LEDs).
Used as a window material
Synthetic sapphire (sometimes referred to as sapphire glass) is commonly used as a window material, because it is both highly transparent to wavelengths of light between 150 nm (UV) and 5500 nm (IR) (the visible spectrum extends about 380 nm to 750 nm, and extraordinarily scratch-resistant. The key benefits of sapphire windows are:
* Very wide optical transmission band from UV to near-infrared
* Significantly stronger than other optical materials or glass windows
* Highly resistant to scratching and abrasion (9 on the Mohs scale of mineral hardness scale, the 3rd hardest natural substance next to moissanite and diamonds)
* Extremely high melting temperature (2030 °C)

Properties of sapphire

Chemical formulaAl2O3
Density3.97 g/cm3
Hardness9 Mohs
Melting point2050oC
Max. use temperature1800-1900oC
Tensile strength250-400 MPa
Compressive strength2000 MPa
Poisson's ratio0.25-0.30
Young's Modulus350-400 GPa
Bending strength450-860 MPa
Rapture Modulus350-690 MPa
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
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)


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

Products Detail
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Process Step
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Company Information

As a prominent manufacturer and exporter who focus on watches and watchparts R&D, manufacturing and sales, we welcome OEM/ODM orders. Our main products including Watches, Watch Parts such as: case, face, glass, straps, bezel inserts, hands, etc., which are all manufactured by high grade raw material and designed in compliance with high quality standard.
We regard "High-quality, Reasonable prices and satisfactory after-sales" as our tenet, offer clients with not-only top notch products but also best after-sale services. All our products are acclaimed for its durability, stylish look and high performance in this domain. Warmly welcome potential buyers to contact us, and looking forward to establishing long term mutually beneficial relationship with you!.
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Our Related Sapphire Products
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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: How is your quality of products and quality guarantee policy?
A3: 100% full test before shipping and 100% compliance with the request of clients.
Q4: What is the payment method? and What is the delivery time?
A3:  Usually in 10-30days after 100% T/T, Western Union, L/C, Paypal,Etc. 

Contact Details

Phone Number : +8615801942596

WhatsApp : +8615801942596