3mm Thickness Round Watch Case , 36mm Watch Case Yellow With Crown Hole

Round Shape Yellow Sapphire Crystal Watch Case With Crown Hole

Czochralski method, or CZ method for short. First heating the raw material to the melting point and then melting to form a melting soup, and then using a single crystal seed to contact the surface of the melting soup, in the crystal seed and the solid liquid interface of the melted soup due to the temperature difference and formed too cold. So the melted soup began to solidify on the surface of the seed and grow a single crystal with the same crystal structure as the seed. The seed is also pulled up at a very slow speed, and accompanied by a certain speed of rotation, with the upward pull of the seed, the melt soup gradually solidified on the liquid solid interface of the seed, and then formed a axis of symmetrical single crystal ingot.

The main features of this method are:

1) In the process of crystal growth, it is convenient to observe the growth of crystals;

2) The crystal grows on the free liquid surface, is not forced by the crucible, can reduce the stress of the crystal;

3) It can be easily used to use the desired orientation seed crystal and "shrink neck" process, which helps to grow higher quality crystals at a relatively fast rate, and the crystal integrity is better;

4) The forced convection and natural convection interaction caused by the rotation of crystals and crucibles make the complex fluid flow action insurmountable and prone to crystal defects;

5) Mechanical disturbances tend to cause defects in the growth of large diameter crystals.

After the crystal has grown and completed the process of disengaging from the crucible, the crystal must be slowly cooled and cooled in the furnace, and the cooling process must be used to anneal the crystal to eliminate the internal stress accumulated by the crystal during the growth period, to avoid the residual internal stress, causing the crystal to crack when cooling due to the release stress. After annealing is complete, turn off the heating voltage and continue to cool, and then remove the sapphire crystals when the temperature in the furnace drops to room temperature to continue the subsequent analysis process.

FATURES

1. High mechanical strength: the permeable infrared window material should have sufficient strength to withstand the high-speed movement of the speed pressure load;

2. Good thermal stability: the permeable infrared window material should be able to withstand the temperature shock caused by pneumatic heating and height changes, transmission ratio and refractive index should not change significantly with the change of temperature;

3. Good chemical stability: through infrared window material exposed to air, should be able to prevent the atmospheric salt solution or corrosion gas corrosion, and not easy to moisture;

4. High optical transmission rate, must be able to effectively transmit ultraviolet to medium infrared radiation;

5. Good optical characteristics, small optical scattering and good uniformity of refractive index;
Meets large window requirements.

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.