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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

Glaze Calculations

Glaze Calculations

Molecular Weights, Formulae and Use of Chemical Equations, Oxides;

Percentage Composition and Formula; Calculation of a Recipe from a Simple Glaze Formula; Given the Recipe of a Glaze Calculate the Formula

CHEMICAL equations are often used in ceramic calculations.

The great importance of chemical equations lies not so much in their being a convenient symbol to express the nature of the reagents and products of a chemical change, but in the fact that all chemical calculations are based on the use of formulae and equations in conjunction with atomic weights.

It is important to understand the use of these fundamental calculations as applied to ceramic materials. Once the formula of a compound is known, then it is a simple matter to calculate the molecular weight. Continue reading

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