Alumina, also known as aluminum oxide (Al₂O₃), is a white, crystalline, amphoteric oxide of aluminum. It is a hard, chemically inert ceramic material, renowned for its high melting point, excellent thermal conductivity, electrical insulation properties, and resistance to wear and corrosion. These properties make it an indispensable material in numerous industrial applications, including refractories, abrasives, and the production of aluminum metal. Its various crystalline forms, like alpha-alumina (corundum), are utilized for diverse purposes.
Alumina meaning with examples
- The high-temperature furnaces in the steel plant used alumina bricks for lining, ensuring excellent heat resistance. These alumina bricks protected the furnace walls from the extreme heat generated during the steel-making process, contributing to the longevity of the equipment and improving operational efficiency. Alumina’s refractory properties are key in this crucial application.
- Jewelers use synthetic sapphire, a form of alumina, to create durable and scratch-resistant watch faces. Its exceptional hardness, second only to diamond, makes it ideal for protecting sensitive watch components. The clarity and aesthetic appeal of the alumina sapphire contribute to the premium quality and value of the timepiece.
- High-purity alumina is often used as a dielectric material in capacitors, providing excellent electrical insulation. Its ability to withstand high voltages and maintain its electrical properties over a wide temperature range makes it suitable for demanding electronic applications. This is because the ceramic material is highly insulating.
- The abrasive properties of alumina are utilized in sandpaper and grinding wheels for polishing and surface finishing. alumina particles are embedded in the material to remove material from surfaces. The material's hardness ensures effective removal of material, ensuring efficient and consistent results across many industrial applications.
Alumina Crossword Answers
13 Letters
ALUMINUMOXIDE
14 Letters
ALUMINIUMOXIDE