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Physical Properties Appearance: grey powder Melting range: 565 - 572°C
(NOCOLOK® Flux) Solubility
in water (20 °C): approx. 4.5 g / l
(NOCOLOK® Flux) Typical Analysis (Specification) Silicon powder:
Si min. 98 %
Fe max. 1 %
Other traces max. 1 % NOCOLOK®Flux:
K 28-31 %
Al 16-18 %
F 49-53 %
LOH max. 2.5 % Particle Size Distribution* NOCOLOK® Sil Flux (fine grade)  Silicon powder
Particle size distribution
[µm] [% weight]
>10 <10
>35 non detectable
Average particle size: 2 µm <x50% <6.0 µm NOCOLOK ® Flux
Particle size distribution
Average particle size: 2 - 6 µm
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