alundum

• Substantivo que designa uma substância de alumina fundida, usada frequentemente como material abrasivo ou refratário.

A noun referring to a substance made of fused alumina, often used as an abrasive or refractory material.

incontável

1. Fused aluminaC2formaltechnical

   A hard, synthetic substance made by fusing alumina (aluminum oxide) at high temperatures, used as an abrasive or refractory material.

   alumina fundida

   • Alundum is commonly used in grinding wheels and cutting tools.
   • The furnace lining was made of alundum bricks to withstand high heat.
   • Laboratories use alundum crucibles for high-temperature experiments.