What are the specifications of potassium fluoaluminate (potassium cryolite)

The main drawback of chloride flux is moisture absorption.
The dehumidifying flux is hydrolyzed during the heating process, which can make the brazer's performance worse or worse.
In addition, the residue cleaning requirements are high, otherwise it is easy to cause corrosion.
Therefore, for a long time many scholars have turned to the absence of brazing soldering.
But in the equipment installation, maintenance, operation and the brazing and assembly of the brazing, the vacuum brazing is more complicated and demanding.
Alalumina material has developed an insoluble brazing agent and has overcome the above shortcomings.
The insoluble flux is potassium fluoaluminate mixed with alf3-kf system.
In this system, the compound K3AlF6 and the composition of the compound K3AlF6 and the heterogenesis compound KAlF4.K3AlF6 and KAlF4 formed the eutectic point eutectic temperature of 560C under certain conditions.
The flux is the composition of the eutectic elements.

Because it is difficult to dissolve in water, it can be used in the paste and not corrode the mother material at the brazing temperature.