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3mm Thickness Scratch Resistant Sapphire , 40mm Watch Glass Round Flat

3mm Thickness Scratch Resistant Sapphire , 40mm Watch Glass Round Flat

Product Details

Place of Origin: Chongqing, China

Payment & Shipping Terms

Minimum Order Quantity: 200pcs

Price: 3-20USD

Packaging Details: Carton

Delivery Time: 5-8 weeks

Payment Terms: T/T

Supply Ability: 10000 piece per month

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Specifications
Highlight:

3mm scratch resistant sapphire

,

40mm scratch resistant sapphire

,

scratch resistant 40mm watch glass

Material:
Sapphire
Size:
Customized Size
Growing Method:
CZ Sapphire
Packing:
Carton
Deliery Port:
Chongqing
Use:
For Watch
Coating:
AR/customer Request
Description:
Scratch-resistant
Material:
Sapphire
Size:
Customized Size
Growing Method:
CZ Sapphire
Packing:
Carton
Deliery Port:
Chongqing
Use:
For Watch
Coating:
AR/customer Request
Description:
Scratch-resistant
Description
3mm Thickness Scratch Resistant Sapphire , 40mm Watch Glass Round Flat

Round Flat Sapphire Crystal Watch Lens Glass For Quartz Watches

 

Sapphire glass/ruby glass has very good thermal properties, excellent electrical and dielectric properties, and is resistant to chemical corrosion. It has high temperature resistance, good thermal conductivity, high hardness, infrared transmission, and good chemical stability. Therefore, it is often used to replace other optical materials to make optical components, infrared-transmitting optical windows, and is widely used in infrared and far-infrared military equipment, such as: used in night vision infrared and far-infrared sights, night vision cameras and other instruments And satellite and space technology instruments and meters, as well as windows for high-power lasers, various optical prisms, optical windows, UV and IR windows and lenses, observation ports for low-temperature experiments, and high-precision instruments for navigation, aerospace, and aviation. Be fully applied.

 

Artificial sapphire is made of bauxite (alumina) and mixed with oxygen and hydrogen.

 

During manufacturing, alumina is first decomposed at a high temperature of 1200 degrees, and then the material reaches a melting point of 2050 degrees. After 15 hours, a rod will be formed. It is fired again at a high temperature of 1800 degrees to ensure the stability of the material.

 

Next, the diamond polishing blade will cut it to the required thickness, and after polishing, it can be made into an arc or semicircular crystal surface.

 

After being polished, in order to ensure a tight fit with the watch case, the semi-finished product needs to be further chemically polished.

Immediately afterwards, these sapphire crystals will go to the furnace of the dust-free laboratory, where they will be anti-glare treated by a precision vacuum evaporation process.

 

The sapphire crystal after anti-glare treatment can reduce 99% of the reflected light entering the naked eye, and the looming blue film plays this role.

 

Property Specifications
Thickness 0.5-200mm
Size Tolerance ±0.01
Edge Finish Ground and beveled
Surface Quality 40-20 scratch-dig
Surface Flatness λ/4@633nm
Parallelism ≤3 arc min(≤0.9mrad)
Clear Aperture >80% of central diameter
Hardness(Knoop) 1370 kg/mm2
Young's modulus 3.4*1011N/m2
Thermal Limit 22W/m/K
Thermal expansion coefficient 8.4*10-6/K

 

3mm Thickness Scratch Resistant Sapphire , 40mm Watch Glass Round Flat 0

Why US?

 

1. We’re the rare source manufacturer of color sapphire boule, and the most professional factory of sapphire processing, especially the special watch case.

2. We have our own sapphire grown equipent with CZ and KY method.

3. Professional customized production according to the drawing provided by clients.

4. Precision work of sapphire processing and polishing.

5. Experienced technicians and skilled workers.

 

FQA

1. Are you a trading company or factory?

We are a professional factory of sapphire products, also a trading company .

 

2.Can you do customized products?

Yes, we specialized in customized production or OEM work.

CAD,3D drawing are needed.

 

3.Could you provide samples?

Yes, we could provide samples with a charge, but if you place the order with a quality above 100pcs, the sample charge will be refunded.

 

4.What’s the delivery time?

It depends on the type of products and the quality.

For watch case, the regular time is around 5-8 weeks for 200pcs according to the difficulty of the processing.

 

5.How about the payment?

T/T payment is prefered.

 

6.How about the delivery?

Mostly by air, like DHL, Fedex.

 

 

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