Definition of calcium oxide in English:

calcium oxide


  • A white caustic alkaline solid, commonly produced in the form of quicklime.

    Chemical formula: CaO

    ‘The dissociation of calcium carbonate to calcium oxide and carbon dioxide at 25°C and atmospheric pressure provides an example; raising the temperature or lowering the pressure drives the reaction in the forward direction.’
    • ‘By melting silica mixed with sodium hydroxide or calcium oxide one is able to interrupt the long chains of silicon-oxygen bonds to form more easily melted glasses.’
    • ‘Calcium carbide, made by reacting calcium oxide with carbon in the form of coke, is the starting material for the production of acetylene.’
    • ‘The surface quickly becomes dull, however, as calcium reacts with oxygen to form a coating of white or gray calcium oxide.’
    • ‘Drywall replaced cedar lath - sometimes wrapped with chicken wire - and it was covered with cement plaster and had a finish coat of calcium oxide - termed ‘quicklime.’’
    • ‘Common soda-lime glass contains about 12% calcium oxide, while high-melting aluminosilicate glass contains about 20% calcium oxide.’
    • ‘Glass was first made from sand and sodium carbonate, found in dry lake beds around Alexandria, and later improved greatly by the addition of lime, calcium oxide.’
    • ‘The analysis to these materials revealed that they contain mainly silica, alumina and calcium oxide, which they account for 89.57% of the total weight.’
    • ‘To create a limed soil, powdered calcium oxide was added to the soil mix at 1 • 5% by soil dry weight.’
    • ‘The process yields carbon dioxide, water, and hydrogen chloride gas, which can easily be removed by injecting powdered lime or by installing a calcium oxide filter.’


calcium oxide

/ˈkalsēəm ˈäkˌsīd/ /ˈkælsiəm ˈɑkˌsaɪd/