Nepheline Syenite


Nepheline syenite is a naturally occurring, silica-free, anhydrous sodium-potassium alumina silicate. Like feldspar, it provides alkalis that act as a flux in the manufacture of glass and ceramics. In glass production, alumina acts as a matrix of stabilizer, enhancing the workability of molten glass, and increasing the resistance for scratching, breaking and chemical protection.

Specification


Typical Properties

APNS 4APNS 5APNS 7APNS 10APNS 12
75µm100%100%100%100%100%
45µm99.9%100%100%100%100%
30µm98.5%99.5%99.5%99.8%100%
20µm90.0%93.0%99.0%99.5%100%
15µm82.0%85.0%95.0%98.0%100%
10µm63.0%65.0%85.0%97.0%99.9%
5µm35.0%30.0%50.0%80.0%90.0%
2µm13.0%48.0%
D50 (µm)7.08.04.52.52.1
Bulk Density0.830.780.630.560.50
Bulk Density0.830.780.630.560.50
Oil Absorption (g/100g)~22~22~25~31~35
Whiteness8182838586
CIELAB Color L:93.3093.3094.1094.4094.60
CIELAB Color a:-0.01-0.01-0.01-0.02-0.02
CIELAB Color b:2.592.592.262.262.2
Hardness (mohs)6.06.06.06.06.0
pH8.98.99.19.29.3
Moisture0.10%0.10%0.15%0.15%0.15%

Chemical Properties

APNSAPNS 13
Ceramic Grade
APNS NF 13
Ceramic Grade
SiO2~ 61.50%~ 61.00%~ 58.00%
Al2O3~ 20.80%~ 21.00%~ 23.20%
Fe2O3< 15%~ 0.13%~ 0.13%
TiO2~ 0.03%~ 0.03%~ 0.05%
Na2O~ 8.40%~ 8.80%~ 9.70%
K2O~ 6.10%~ 6.00%~ 5.70%
CaO~ 0.75%~ 0.30%~ 1.00%
MgO~ 0.10%~ 0.05%~ 0.05%
L.O.I.~ 2.10%~ 2.20%

Particle Size Distribution

+75µm (200 Mesh)Trace
+45µm (325 Mesh)< 2.00%
-45µm (325 Mesh)> 98.00%
D50 (µm)< 10.0
Moisture< 0.3%

Download Spec. Sheet