Synthetic sapphire production
There is a very important factor in the process of synthetic sapphire production, that is, the long crystal process of sapphire. Why do you say that? Because the heat field material of this link, namely the key preparation material of sapphire single crystal furnace is refractory metal tungsten and molybdenum materials. The cost of the whole thermal field material accounts for more than 1/3 of the cost of the whole sapphire crystal. As you may know, scientists around the world have been studying artificial sapphires for more than 100 years, ever since 1885, when scientists in France first made the now-famous "Geneva Ruby". Therefore, the urgent task facing long crystal industry is how to achieve low cost, high quality growth of large size sapphire single crystal! Because this link is also a very important LED related product price factors.
Data show that at present, the global annual addition and replacement of sapphire single crystal furnace required tungsten and molybdenum materials at least more than 1,000 tons. Because the thermal field temperature of sapphire elongate crystal is relatively high, deformation and cracking phenomenon may still exist at such high working temperature even though tungsten and molybdenum have relatively high melting point. That is to say, in order to reduce the change the frequency of the thermal field with tungsten molybdenum materials, or, in order to prolong the service life of thermal field with tungsten molybdenum material, or rather, decrease the cost of materials, thermal field was better tungsten crucible and molybdenum crucible tray (containers) as raw materials for the alumina, tungsten tray and molybdenum tray (play the role of supporting crucible), cage tungsten heater (close to the sides of the crucible. For heating raw materials, tungsten wire (heating wire), tungsten heat/molybdenum heat insulation screen (tungsten/molybdenum heat insulation screen is made of tungsten sheet/molybdenum sheet around the heating body, in which the upper and lower ends are wafer heat insulation screen, and the side is tungsten/molybdenum barrel heat insulation screen) and other tungsten, molybdenum sapphire long crystal heat field materials are an urgent task to be solved.
Today is a rapidly developing information age, at the same time, all kinds of materials and technologies are updated at a rapid rate. This extremely importance technology crystal, sapphire single crystal, have been widely used in displays, mobile phone back light technology, such as product, unmanned aircraft, missile, photoelectric pod, atomic clocks, photoelectric counter equipment, photoelectric tracker and infrared warning system and military products such as watches, LED lighting and other precision components such as civilian products. As mentioned above, the thermal field of sapphire long crystal furnace needs the support of tungsten and molybdenum materials. As a large resource of tungsten and molybdenum, China has advantages in reserves, which can bring great power to the development of national defense, science and technology and industry. In the last ten years, however, China has supplied 80 per cent of the world's tungsten production. In this regard, some experts said that tungsten and molybdenum, as important strategic resources, should be reserved for our own economic development and the preparation of national defense armaments, especially the use of sophisticated weapons!
