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NC-4 Feldspar

Alternate Names: NC4 Feldspar, Spruce Pine #4 Spar

Oxide Analysis Formula
CaO 1.40% 0.14
K2O 4.10% 0.24
MgO 0.05% 0.01
Na2O 6.80% 0.61
Al2O3 18.85% 1.03
SiO2 68.15% 6.32
Fe2O3 0.07% -
LOI 0.09%n/a
Oxide Weight 554.19
Formula Weight 554.69

Notes

NC-4 feldspar is a high quality sodium / potassium / calcium aluminum silicate ground to 170, 200 and 250 mesh, for ceramic applications. Carefully beneficiated and controlled for quality, NC-4 feldspar offers high alkali content and low iron oxide content per unit of alumina. Its various grinds are tailored for specific applications.

Now called Minspar 200.

Related Information

Links

URLs http://www.zemex.com/feldspar/nc4spar.html
NC4 Data Sheet
Materials G-200 Feldspar
Materials Sil-o-spar
Materials SP-G Feldspar
Materials Potash Feldspar
Materials Soda Feldspar
Materials Minspar 200
Materials F-4 Feldspar
Materials Kona F-4 Feldspar
Typecodes Feldspar
The most common source of fluxes for high and medium temperature glazes and bodies.

Data

Apparent Viscosity (cps) 170: 14.1, 200: 12.6, 250: 10.6
Bulk Density lbs/cu. ft. (Packed) 62 loose, 74 packed
Sieve Analysis Dry 170: +200 mesh: 1.92%, +325: 11.97 200: 0.7%, 6.6% 250: 0.06%, 1.5%
Density (Specific Gravity) 2.65
Surface Area (m2/gm) 170: 1.21, 200: 1.29, 250: 1.48
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