Nepheline Syenite, 270 mesh
$1.88
Item #: CH-NS
| Qty: | Unit Price: |
|---|---|
| 5 | $1.41 |
| 25 | $1.18 |
| 50 | $1.06 |
| 250 | $0.94 |
Priced per pound. Quantity discounts are available.
Nepheline Syenite, 270 mesh.
Nepheline Syenite (K2O×3Na2O×4AlO3×9SiO2) is a common flux chemically similar to a soda feldspar. However, Nepheline Syenite has much different origins than soda spars, and as such, is actually much more chemically-complex. generally, nepheline syenite contains a varying blend of nepheline, iron minerals, soda feldspar and potassium feldspar, as well as silica, alumina, and calcium. Nepheline syenite is a low silica, high soda and high alumina mineral. Its high alumina content strengthens glass, and the high soda makes it a great flux.
When added to clay, Nepheline Syenite can reduce crazing tendencies. It can also significantly lower the fusing temperature of traditonally-high temperture claybodies, such as porcelain. Nepheline Syenite has beome a mainstay in the ceramics industry over the years, where it is used as a popular filler/claybody constituent in tile and industrial-garde porcelain production.
Added to glazes, Nepheline syenite increases the firing range of low-fire and mid-range glazes. Nepheline Syenite can, however, incrase crazing in glazes due to its high thermal expansion.
In ceramics, 270 mesh is the most common size used and has a medium melting and shrinking rate.
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