What about ceramic processing with temperatures 1200 to 1500C?

Applications with ceramics at high temperatures typically require an inert atmosphere of hydrogen to enable proper flow of the braze alloy on the ceramic.

Applications with ceramics at high temperatures typically require an inert atmosphere of hydrogen to enable proper flow of the braze alloy on the ceramic. The hydrogen acts as a reducing gas and actively removes any free oxygen from the area. Proper safety precautions need to be taken when running such applications.