Transparent Watch Case Sapphire Cover Glass Wear Resistance Polished Surface
Brand Name:zms
Model Number:watchcase
Minimum Order Quantity:30pcs
Delivery Time:2-4weeks
Payment Terms:L/C, T/T
Place of Origin:china
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Location:
Shanghai Shanghai China
Address:
Rm5-616,No.851,Dianshanhu avenue, Qingpu area，Shanghai city，CHINA
Supplier`s last login times:
within 13 hours
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Product Details
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1. What is sapphire glass?
sapphire waferis one of the hardest materials, is come from 99.999％ Al2O3 single crystal,
and possesses very good transmission during the range ofvisible and near IR spectrum.
It is widely used as optical window in infrared and far infrared
military equipments, apparatus and instruments of satellite and
space technology, and navigation and spaceflight, such as night
infrared scope/sight and night vision camera, etc.The sapphire
wafercrystal window is intensively applied in high-tech fields.
sapphire waferoptical windows are ideal for applications where high
pressure, vacuum, or corrosive atmospheres are a consideration.
Sapphire, a single crystal form of Al2O3, is resistant to attack by
strong acids due to its high dielectric constant. It has high compressive strength and a high melting point.
It is also resistant to UV radiation darkening.
| 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 |
Sapphire glass cover of applications
Sample in details for watch glass
3.Saphphire Produce process
Al2O3 CRYSTAL body-------> Crystal cutting in axis needed ------>shape repair-----> anneal
------->lapped------->polish------>inspective----->(AR coating)------>package
commen size can be provided
| Diameter | 0.2-300mm |
| Thickness | 0.1-100mm |
| Dimension tolerance | +/-0.1mm or +/-0.02mm |
| Surface quality (scratch & dig) | 60/40, 40/20 or better |
| Clear aperture | >85%, >90% |
| Surface accuracy | L/10, L/2, L |
| Parallelism | +/-3' ,+/-30'' |
| Bevel | 0.1~0.3mm x 45 degree |
| Coating | AR, BBAR or Custom |
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.
Q: How to pay?
A:100％ T/T, Paypal, Secure payment and Assurance payment.
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 10pcs. if 20pcs 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.
Thanks~~~
Transparent Watch Case Sapphire Cover Glass Wear Resistance Polished Surface
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