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OxideAnalysisFormula
CaO6.27%0.287
K2O2.30%0.063
Na2O15.71%0.650
Al2O33.70%0.093
B2O32.58%0.095
SiO269.44%2.966
Oxide Weight256.69
Formula Weight256.69
If this formula is not unified correctly please contact us.

Shipped from Spruce Pine, North Carolina. No longer available. Minspar 200 (formerly NC4) has virtually identical chemistry to F-4 and should be a good substitute.

Particle sizes:
+100 mesh: trace
+140: .1
+170: .1
+200: .2
+325: 3.8

This material is prized as a porcelain ingredient because of its low iron content. It is used in casting and throwing porcelains of all types. At cone 6 for example, it is possible to make a vitreous body using 50-60%. However to get enough plasticity in such bodies, it is necessary to use ball clay or bentonite which can darken the color. If high plasticity is not essential, Macaloid and plastic kaolins can be used.

Another similar material is Nepheline Syenite.


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By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="" descrip="" searchkey="" loi="0.00" casnumber=""> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="6.270" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.300" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="15.710" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="3.700" tolerance=""/> <oxide symbol="B2O3" name="Boric Oxide" status="" percent="2.580" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="69.440" tolerance=""/> </oxides> </material>


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