| 释义 |
Definition of alumina in English: aluminanoun əˈluːmɪnəəˈlumənə mass nounA white solid that is a major constituent of many rocks, especially clays, and is found crystallized as corundum, sapphire, and other minerals. Alternative name: aluminium oxide; chemical formula: Al₂O₃ Example sentencesExamples - He derived the name from the mineral called alumina, which itself had only been named in English by the chemist Joseph Black in 1790.
- Already some sites yield little more than a mass of crystallised aluminium oxide.
- The metals are dispersed as tiny particles on a supporting framework of porous aluminium oxide.
- The major exports are bauxite, alumina, gold, and diamonds.
- The silica, alumina, and iron come from sand, clay, and iron ore.
Origin Late 18th century: from Latin alumen (see alum), on the pattern of words such as magnesia. Definition of alumina in US English: aluminanounəˈlo͞omənəəˈlumənə A white solid, aluminum oxide, that occurs in bauxite and is found in crystalline form as the main constituent of corundum, sapphire, and other minerals. Aluminum oxide; chemical formula: Al₂O₃ Example sentencesExamples - The metals are dispersed as tiny particles on a supporting framework of porous aluminium oxide.
- Already some sites yield little more than a mass of crystallised aluminium oxide.
- The silica, alumina, and iron come from sand, clay, and iron ore.
- He derived the name from the mineral called alumina, which itself had only been named in English by the chemist Joseph Black in 1790.
- The major exports are bauxite, alumina, gold, and diamonds.
Origin Late 18th century: from Latin alumen (see alum), on the pattern of words such as magnesia. |