sapphire crystal watch

- Mar 14, 2019-

Sapphire glass (SAPPHIRE CRYSTAL) generally refers to synthetic sapphire, which is quite different from natural sapphire, which is commonly used in the manufacture of wrist mirror.

It is a wear-resistant material with tungsten-titanium alloy and high-tech ceramics. Although these materials can resist wear, they can not withstand strong impact. At the same time, some materials with the same or higher hardness (e.g. grindstone, sandpaper, nail brush, granite surface, concrete wall and ground) may scratch the surface of these materials.

Sapphire is a general term for corundum gemstones of all colours except red rubies. The main component of sapphire is alumina (Al2O3). Sapphire glass refers to synthetic sapphire, which can be easily and cheaply produced in the laboratory. Its chemical composition and physical properties are the same as natural sapphire.

Sapphire glass. Similar to corundum, with a hardness of 9, various colors can be produced by adding various chemical elements. Now the commonly used color is colorless. Its advantages are higher hardness and higher price than ordinary glass. It is mainly used to make high-end watch mirrors.

Sapphire glass/ruby glass has good thermal properties, excellent electrical and dielectric properties, and chemical corrosion resistance. 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 elements and transparent infrared optical windows, and is widely used in infrared and far-infrared military equipment, such as: night vision infrared and far-infrared sights, night vision cameras and other instruments and satellites, space technology instruments and instruments, as well as high-power laser windows, various optical prisms, optical windows, U. V and IR windows, lenses and observation ports for cryogenic experiments have been fully used in high precision instruments for navigation, aerospace and aeronautics.