alumiinidioksidia

Alumiinidioksidi is the Finnish term for aluminum oxide. It is a chemical compound with the formula Al2O3. Aluminum oxide is an amphoteric oxide, meaning it can react with both acids and bases. It is a white, crystalline solid that is insoluble in water. Naturally occurring aluminum oxide is found in the minerals corundum, ruby, and sapphire. Synthetic aluminum oxide is produced industrially through the Bayer process.

Aluminum oxide is a very hard and durable material, making it useful in a variety of applications. It is commonly used as an abrasive, in sandpaper, grinding wheels, and polishing compounds. Its high melting point and electrical insulating properties also make it valuable in refractories, ceramics, and as a substrate for electronic components. In dentistry, it is used for its hardness and biocompatibility. Furthermore, refined forms of aluminum oxide, such as alumina, are crucial in the production of aluminum metal. The gemstone varieties, ruby and sapphire, are distinguished by trace impurities that give them their characteristic colors.