SAPPHIRECRYSTAL generally refers to synthetic sapphire, which is quite different from the natural sapphire that people usually understand, and is generally used to make watches and mirrors.

It, tungsten-titanium alloy and high-tech ceramics are all wear-resistant materials. Although these materials can resist wear, they can't withstand strong impact, and some substances with the same or higher hardness (such as grindstone, sandpaper, nail polish, granite surface, concrete wall and ground, etc. ) may scratch the surface of these materials.

Sapphire is the general name of corundum gemstones with other colors except ruby, and its main component is alumina (Al2O3). Sapphire glass refers to synthetic sapphire, which can be produced easily and cheaply in the laboratory, and its chemical composition and physical properties are the same as those of natural sapphire.

Extended data:

According to the news from the supply chain, at present, a piece of sapphire glass of about 4 inches is about 30-40 dollars, which is a large share compared with the iPhone with a total cost of about 200-300. The cost of a piece of gorilla glass of Corning Company in the United States is about 3-4 dollars, and the price difference of 10 times is not a small amount in the components.

The reason behind the high price is mainly the immaturity of technology. Although GTAdvancedTechnology has been able to produce sapphire glass like hair, which can be used for mobile phone screens, mass production still needs the development and improvement of productivity. Large-scale production of sapphire glass mirrors with current technology still needs to pay a great environmental price.

TonyTripeny, senior vice president of Corning Company, said: "The processing method of sapphire is not good for the environment, because it takes more than 100 times of energy and more than 4,000 times of time to make it."

References:

Baidu encyclopedia-sapphire glass

References:

People's Network-The conjecture that sapphire is used in mobile phones.