Nepheline syenite
Nepheline syenite is a rock composed mainly of feldspar and nepheline, minerals rich in aluminum and silica, which is used as a flux. This naturally occurring feldspar contains abnormally high amounts of alkali, particularly sodium and potassium, relative to its silica and alumina content. As a result, it has a lower melting point than other feldspars, making it a desirable substitute when a lower maturation range is required in firing, both for clay bodys and in frits and glazes. Despite this lower maturation range, nepheline syenite manages to maintain a quality similar to that of feldspar, providing the same translucency and mechanical strength in ceramic products.
An important factor in the effectiveness of nepheline syenite as a flux is its grain size, which has a great influence on its melting properties. The finer the grain of nepheline syenite, the greater its influence as a flux, which facilitates the creation of more homogeneous glazes with better aesthetic and mechanical characteristics.Interesting Fact
Nepheline syenite is used not only in ceramics, but also in the glass industry, where it helps to reduce energy costs by allowing glass to melt at lower temperatures. This makes it a valuable resource in both artisanal and industrial processes.Helpful Tip
If you are looking to reduce the firing temperature of your glazes or improve the vitrification of your pieces without sacrificing quality, try incorporating nepheline syenite in your mixtures. Remember to test fire to ensure that the result is as expected.
