Apple Watch’s dial is very wear-resistant because its mirror is made of sapphire glass. The hardness of sapphire glass is second only to the most-hard transparent material of diamond, with extremely scratch-resistant characteristics, using it as a display screen does not need film at all. Even after tortured by some keys, coins, mirrors and other sharp stuff, there will be no scratches or other traces.
The wear resistance of the watch has been paid attention to by everyone, because it is often worn on the wrist, exposed outside, so that it will be rubbed, scraped. But the watch is not like a mobile phone can use protective cases, film and other ways to protect, I do not know if you have found almost no smart watch protection accessories in life, so apple watch using sapphire glass material is really a smart choice.
Some might be surprised: Apple used sapphire as a watch display? How expensive is the sapphire? In fact, the sapphire glass used by Apple is synthetic and much cheaper than the natural sapphire. The general process of its production is to put sapphire crystals, some compressed diamond jade, defect blank crack wool and so on into the molybdenum crucible, and then put the molybdenum crucible into the furnace, 2200℃ under vacuum for smelting, and after a long series of cooling cycles after crystallization to get sapphire.
Because the melting point of molybdenum is as high as 2610℃, the molybdenum crucible is widely used in the core containers in industrial furnaces such as sapphire single crystal growth furnace, quartz glass smelting furnace and rare earth smelting furnace, and its working temperature environment is generally more than 2000℃. Especially for sapphire single crystal growth furnace, with high purity, high density, no internal crack, the size precision, internal and external wall clean, and other characteristics of molybdenum crucible of sapphire crystal growth in the process of crystal success rate, crystal quality control, crystal pan and service life has played a key role, and not easy to react with sapphire, can well protect the purity of sapphire.
Molybdenum crucible is one of the most commonly used materials to make sapphire. It is extremely scratch-resistant and can withstand even the harshest conditions. The material is also highly corrosion-resistant, making it a great choice for applications that require long-term durability. Additionally, molybdenum crucible has a high melting point, allowing for the creation of high-quality sapphire materials.