Potassium & Sodium feldspar

Potassium feldspar
Sodium feldspar
Sodium feldspar chenmical formula is K2O • Al2O3 • 6SiO2, theoretical chemical compositions are SiO2 68.8%, Al2O3 19.4%, Na2O 11.8%, density is 2.61-2.64 g/cm3, Mohs hardness is 6-6.5, melting point is about 1100 ℃.
Characteristics

At high temperature, it can dissolve quartz, clay and mullite quickly and has high solubility

Low melting temperature, good transparency

The melting temperature range is narrower than K-feldspar. The viscosity of the melt is small at high temperature and changes rapidly with temperature

Technical Specifications

Specs.(%)

Guaranteed Value

Typical Value

S(%)

≤0.03

0.001

P(%)

≤0.03

0.005

SiO2(%)

64.67

66.5

CaO(%) 0.64
TFe2O3(%)

≤1.0

0.13

Al2O3(%)

≥17

18.64

K2O(%)

≤3

0.35

Na2O(%)

≥10

11.3

100mesh

30-70

(30-35)

200mesh

5

-200mesh

30%
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