ARH Sapphire Co., Ltd
To be the best sapphire product supplier.
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OEM Designed Sapphire Crystal Watch Case For Customized Movement
The Kyropoulos method, referred to as KY, was first proposed by Kyropoulos in 1926 and used for crystal growth, and for a long time thereafter, the method was used for the preparation and research of large-size halogen crystals, hydroxides and carbonates. In the 1960s and 1970s, this method was improved by Musatov of the former Soviet Union and applied to the preparation of sapphire monocrystalline. The method grows a single crystal, the appearance is usually pear-shaped, the diameter of the crystal can grow to a size 10 to 30mm smaller than the inside diameter of the pot.
KY methord is the use of temperature control to grow crystals, the biggest difference with CZ is only pull out the crystal neck, the crystal body part is dependent on temperature changes to grow, less pull and rotation interference, better control process, and pull the crystal neck at the same time, adjust the heater power, so that the melting raw materials to reach the most suitable long crystal temperature range, so that the growth rate to achieve the most ideal, and thus grow the most ideal quality sapphire single crystal.
| 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 |
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.