Silver Soldering

Laser heating?

Gas/Flame heating?

These options are not viable due to open flame issue. We use many solvents in the area and cannot use any type of open flame or arcing method.

Hi,

I would try hard to separate the solvent areas from the brazing area.

And I would make a cabinet with argon purge to minimise oxidation and circumvents problems with flux and contamination with flux residues.

Cabinet walls and doors and seals shall stay cool.

With these two measures you can switch to whatever heating method is best suited.

If you don't want to change the conditions then you may switch to a metallic heater: try a plate of high chromium stainless steel or NiCr or titanium, depending on size and thickness this may require a change in the voltage of your power supply .

RHABE

Define better?

From a cost point of view, efficiency ,cleanliness and speed your present method would be the best.

I have also used the induction unit sold by American Beauty tools. They work fairly well, but the carbon has a tendency to foul up with the flux and it requires constant cleaning of the carbon induction pads to keep it working properly.

A pad made of something other then carbon that does not wear down as easy and something easier to clean the residual flux from might be the way to go. See if you can source something different? Perhaps clad the carbon with something that has good heat transfer properties but not as brittle or fragile as the carbon.

We also use a gas torch to do the majority of our work. the small induction unit is just used in cases of repairs and tight areas where you can not use a flame.