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alumina Definition

alu·mina (ə lo̵̅o̅′mə nə)

noun

an oxide of aluminum, AlO, present in bauxite and clay and found as different forms of corundum, including emery, sapphires, and rubies

Etymology: ModL < L alumen (gen. aluminis), alum

alumina Usage Examples

Converse of object

  • activate: Examples silica gel, activated alumina, molecular sieve.
  • dope: This is known to be the optimum conditions for the doped alumina.
  • fuse: The white storage elements consist of a highly heat resistant material based on special fused alumina which has very high heat capacity and conductivity.

Adjective modifier

  • low: Two patents have been granted on the manufacture of low dielectric loss alumina.

Modifies a noun

  • cement: Other problems may be presented by the use of high alumina cement concrete.
  • powder: For example, the Bayer process for the production of alumina powders initially grew from spark plug production.
  • refinery: The alumina refinery in Jamaica requires vast lagoons for settling and drying the residues.
  • substrate: Alumina substrates can also be used to produce chemically stable, strongly hydrophobic surfaces.
  • grain: With the exception of a few alumina grains most of the laboratory IS grains appear to have formed around carbon rich stars.
  • content: Analysis suggested hydraulic lime, the silica and alumina content being high.

Noun used with modifier

  • %: The door is constructed with Stein's 42 % alumina low spalling refractory bricks.
  • loss: Two patents have been granted on the manufacture of low dielectric loss alumina.