Aluminum oxide has high thermal and chemical stability, and can be used for high-temperature insulation, making heat shields or protective coatings.

When analyzing trace elements in alumina, the most important step is the digestion of the sample. Alumina is a material that is difficult to dissolve. The traditional melting decomposition method will bring impurities into the sample. The microwave digestion method is an ideal choice. By virtue of a suitable acid system and temperature and pressure confined space, it can get the ideal decomposition effect in a short time.