... carbon, sulfur determination in ferrous and non-ferrous metals, semiconductors, electronic materials, rare earth materials, ores, ceramics, coal, graphite, ... using resistance furnace requires 150-300 seconds.9. Crucible:Ceramic crucible using in induction furnace is 25mm in diameter; ... Tubular resistance furnace:1500°C,Max 4.4KW.Ceramic crucible using in induction furnace may be pretreated in ...