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

By Tony Hansen
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