Most traditional kaolin-based, silica rich, refractory brick and fiber can be used to insulate low temperature (1,120°C, 2,050°F) atmosphere (hydrogen-nitrogen) belt furnaces because these furnaces generally operate in atmospheres and at temperatures and dew points where silica is stable. These furnaces, which are used to sinter, braze and normalize P/M parts, typically incorporate silicon carbide (SiC) based structural furnace refractory.
