Sapphire glass is not made from natural sapphire, but from alumina, which has anti-wear and anti-corrosion properties. But this does not mean that it will not be scratched. Special attention should be paid to avoiding collisions with diamonds, grinding stones, sandpaper, nail files, granite surfaces, concrete walls, etc., to avoid scratching their surfaces. After conventional annealing treatment (around 1400 ℃), the stress inside the wafer cannot be released. Therefore, during the subsequent grinding and chamfering processes, the wafer is prone to edge chipping, cracks, warping, and astigmatism, which will further reduce the yield of sapphire wafers. Therefore, in order to improve the yield of wafer processing, it is necessary to promptly eliminate the internal stress of sapphire crystal rods. In addition, in growth furnaces using tungsten cages as heating elements, tungsten atoms (W) and a small amount of molybdenum atoms (Mo) may randomly enter the melt through solid-state diffusion, permeation, and other forms.

The sapphire hair removal device adopts medical grade cold light technology, sapphire lamp head and window light guide. Compared with ordinary hair removal devices, the high transmittance of sapphire glass allows light waves to penetrate deep into the roots of the skin.

1. The cold touch technology uses a rare sapphire optical head, which can cool down the local skin to 4 ℃. The entire hair removal process is cool and painless, with a freezing point beauty effect, and there is no need for cold compress afterwards.

2. The ultra large square spot upgrades traditional circular spots to seamless squares, eliminating the overlapping areas formed by circular spots. Large 12 × 10mm square light spot, accurate coverage, fast speed, ultra fast hair removal mode, continuous and uniform, using laser energy to increase hair removal speed and depth.

3. The combination of light wave freezing point laser and sapphire cold touch technology accurately targets melanin particles, which does not affect sweating after hair removal and is safer. Sapphire wafers can also be used as substrates for gallium nitride wafers and their solid solutions, based on which rainbow colored spectral diodes are formed. Under the same brightness conditions, its power consumption is 10-15 times lower than incandescent lamps.

Sapphire window is a dual plane optical sapphire glass commonly used as a protective window for sensors and detectors, without altering the magnification of the system. It has excellent surface hardness and a transmittance range from ultraviolet to mid infrared wavelengths. Sapphire can only be scratched by a few substances, and this substrate has chemical inertness. It is insoluble in water, ordinary acids or bases at temperatures up to about 1000 ° C, and can be used in many fields such as industry, medicine, and scientific research.