|Monthly Tech-Tip |
Glass-ceramic frits are made by the controlled devitrification (crystallization) of a composition to create a homogeneous structure in a glassy matrix. Glaze employing these crystalline frits have improved hardness. Glass ceramic coatings are common on tiles because of their superior abrasion resistance compared to glazes. These materials can be lead free and thus offer a way to produce very bright colors without using encapsulated stains (utilitarian ware employing frit glass in the glaze is often very brightly colored).
Technical paper on mico glass-ceramic glazes
Heating Microscope Analysis for Frits
This is a type of stain manufacture that enables the use of metal oxides (like cadmium) under temperature conditions in which they would normally fail.
Ceramic materials are among the hardest and most heat resistant materials known. Ceramics spans the spectrum from ancient terra cotta to modern hi-tech materials.
Ceramic glazes are glasses that have been adjusted to work on and with the clay body they are applied to.
|By Tony Hansen|
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