Alumíniumoxidból

Alumíniumoxidból is the Hungarian word for "from aluminum oxide." Aluminum oxide, also known as alumina, is a chemical compound with the formula Al2O3. It is an amphoteric oxide, meaning it can react with both acids and bases. Naturally occurring aluminum oxide is rare, with the mineral corundum being a common example. Corundum is known for its hardness and is used as an abrasive and gemstone, with ruby and sapphire being varieties of corundum colored by impurities.

In its pure form, aluminum oxide is a white, crystalline solid. It is highly insoluble in water and possesses a very high melting point, making it suitable for applications requiring thermal resistance. Its hardness, electrical insulating properties, and chemical inertness are also key characteristics.

Aluminum oxide is produced industrially through the Bayer process, which involves the purification of bauxite ore. The resulting alumina is a crucial raw material in the production of aluminum metal via the Hall-Héroult process. Beyond metal production, aluminum oxide finds extensive use in refractories due to its high melting point, in ceramics for its strength and wear resistance, and as an abrasive in sandpaper and grinding wheels. It is also employed in catalytic converters and as a desiccant. Its applications span across industries from construction and automotive to electronics and aerospace.