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Oxides

Oxides

previously read the article glaze calculations

An oxide can be defined as a compound of two elements, one of which is oxygen.

The molecular formulae of glazes and frits are given in terms of molecular parts of the constituent oxides. The oxides are classified into three main groups:

( l ) Acidic Oxides

They are the oxides of non-metals. If soluble in water, they combine with it, forming an acid,

e.g.  SO3+ H2O = H2SO4

They combine with bases to form salts.                             .

An example, using the acidic oxide CO2, is given below:

Ca(OH)2+CO2 = CaCO3+ H2O

Silica (SiO2) and boric oxide (B203) are the two main acidic oxides used in frits and glazes. They combine with other elements to form silicate and borate glasses.

(2) Basic Oxides Continue reading

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