Scandium Oxide

Scandium oxide
The chemical formula of scandium oxide is Sc2O3. Nature: white solid. It has cubic structure of rare earth sesquioxide. Density 3.864. Melting point 2403 ℃± 20 ℃. Insoluble in water, soluble in hot acid. It is prepared by thermal decomposition of scandium salt. It can be used as evaporation material for semiconductor coating. Make variable wavelength solid-state lasers, high-definition television electron guns, metal halide lamps, etc.
Scandium oxide (Sc2O3) is one of the most important products in scandium products. Its physical and chemical properties are similar to those of rare earth oxides (such as La2O3, Y2O3 and Lu2O3), so the production methods used in production are very similar. Sc2O3 can produce scandium metal (Sc), products of different salts (ScCl3, ScF3, ScI3, Sc2 (C2O4) 3, etc.) and various scandium alloys (Al-Sc, Al-Zr-Sc series). These scandium products have practical technical value and good economic results. Due to some characteristics of Sc2O3, it has been widely used in aluminum alloys, electric light sources, lasers, catalysts, activators, ceramics and aerospace, and its development prospects are very broad.
In the 1970s, China began to develop Sc2O3 products, and kilogram products entered the market. In the 1980s, China's production of Sc2O3 reached a climax, with the output reaching more than 100 kg, mainly exported to Japan and the United States. Since the 1990s, Russia has produced a large number of Sc2O3 products and thrown them into the international market at a low price, which has seriously impacted the production of scandium oxide in China, making the production of Sc2O3 at a low point, and many production lines have been down, making China's capacity and output in a shrinking state. However, in recent years, the development of Sc-Al alloy and electric light source materials in China has promoted the development of Sc2O3 industrial production. China is rich in scandium resources. It is reported that the industrial reserves of scandium in the world are about 2 million tons at present, and there are about 600000-650000 tons in China, accounting for about 30% of the world's total content.