alumina

/uh-loo-muh-nuh/US // əˈlu mə nə //UK // (əˈluːmɪnə) //

氧化铝,白炭黑,铝,矾土

Definitions

n.名词 noun

1
- : the natural or synthetic oxide of aluminum, Al2O3, occurring in nature in a pure crystal form as corundum.

To this are added 250 parts by weight of washed gelatinous alumina.
The alumina is dissolved in sulphuric acid, leaving the silica.
The ash should then be submitted to the various reagents in order to detect lime, alumina, &c.
Sulphydrate of ammonium precipitates alumina from these solutions:—7.
By decomposing a solution of crude sulphate of alumina with neutral or monobasic acetate of lead.