Its high melting point and high boiling point, as well as its excellent heat resistance, make alumina an ideal material for high-temperature furnace insulators and electrical insulators. Alumina film is also a vital component in the microchip industry. Its other uses include spark plug insulators, micro-electric substrates and insulating heat sinks.
Brown aluminium oxide blast media is a very good medium because brown aluminium oxide is one of the hardest abrasives.
Aluminium oxide sandpaper is used for general-purpose grinding of paints, wood and metals.
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