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[China]
Trade Verify
Address: Rm5-616,No.851,Dianshanhu avenue, Qingpu area，Shanghai city，CHINA
Contact name:Wang
SHANGHAI FAMOUS TRADE CO.,LTD |
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double side polished phone cover protective glass film by Al2O3 crystal on
A-axis orientation
1. Sapphire glass are manufactured from Al2O3 single crystal, ideal material for 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.
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Comparison of optical window materials
| Material | Properties | Applications |
| BK7 | Transmission Range: 330-2100nm Refractive Index: 1.5164@588nm | Most popular and low cost Visible and near IR spectrum applications |
| Fused Silica | Transmission Range: 185-2500nm Refractive Index: 1.4858@308nm Low Thermal Expansion Coefficient: 0.54 x 10-6K | UV to IR spectrum Best choice for thermal resistance application. |
| Sapphire | Transmission Range: 180-4500nm Refractive Index: 1.755@1000nm Strong Hardness | Best choice for scratch resistance applications Thinner optics Wide Transmission Range |
| Calcium Fluoride | Transmission Range: 170-7800nm Refractive Index: 1.399@5000nm Little Hygroscopic Susceptibility High Thermal Expansion Coefficient: 18.85 x 10-6K | IR laser applications |
| MgF2 | Transmission Range: 120-7000nm Refractive Index: 1.376@700nm | UV laser applications |
| Materials characteristics |
| Item | B270 | CaF2 | Ge | MgF2 | N-BK7 | Sapphire | Si | UV Fused Sillca | ZnSe | ZnS |
| Refractive index(nd) | 1.523 | 1.434 | 1.003 | 1.413 | 1.517 | 1.768 | 3.422 | 1.458 | 2.403 | 2.631 |
| Coeffcient of dispersion(Vd) | 58.5 | 95.1 | N/A | 106.2 | 64.2 | 72.2 | N/A | 67.7 | N/A | N/A |
| Density(g/cm3) | 2.55 | 3.18 | 5.33 | 3.18 | 2.46 | 3.97 | 2.33 | 2.20 | 5.27 | 5.27 |
| TCE(μm/m℃) | 8.2 | 18.85 | 6.1 | 13.7 | 7.1 | 5.3 | 2.55 | 0.55 | 7.1 | 7.6 |
| Soften Temperature(℃) | 533 | 800 | 936 | 1255 | 557 | 2000 | 1500 | 1000 | 250 | 1525 |
| Knoop hardness(kg/mm2) | 542 | 158.3 | 780 | 415 | 610 | 2200 | 1150 | 500 | 120 | 120 |
The advantage of comparison
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
Applications
Sapphire Washers, Sapphire Windows, Sapphire Bearings, Sapphire
Rods, Sapphire Tubes, Ruby
sapphire wafer, dome sapphire, Sapphire insulation Film, Sapphire
ball lens, Sapphire/ruby ball
Sapphire glass cover of applications
common specification of sapphire glass for phone
size:135x63.5mm, 140X70mm,
thickness:260±25um,or 300±25um,
surface: double side poshlied (or as-cut rough plate)
Ra:＜0.3nm
SD:40/20 ,60/40,20/10,
TTV:＜15um
Bow:＜20um
sample in detail
FAQ:
Q: What's the way of shipping and cost?
A:(1) We accept DHL, Fedex, EMS etc.
(2) it is fine If you have your own express account ,If not,we could help you ship them
and Freight is in accordance with the actual settlement or by FOB.
Q: How to pay?
A: T/T by 50％ deposit,rest before delivery.
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 50pcs. if 100pcs it's better.
(2) For customized products, the MOQ is 50pcs up.
Q: What's the delivery time?
A: (1) For the standard products
For inventory: the delivery is 5 workdays after you place the order.
For customized products: the delivery is 2 -4 weeks after you order contact.
Q: Do you have standard products?
A: Our standard products in stock. as like substrates 2inch 0.43mm 1sp or 2sp thickness
each orientation in stock.
