High purity (99.9%) heat resistant graphite crucibles with flat bottom. Good for use with induction heating, recommended for precious metals casting. Comes with a silicon dioxide (SiO2) jacket to prevent melting material leaking in case the graphite crucible breaks. Volume: 75ml, compatible induction coil: 60mm ID vertical coils.
Graphite, often called black lead, can tolerate thermal shock and withstands constant working temperature up to 1500°C or 3600°C (vacuum condition). They are the best electrical conductive material known to man, 4 times of steel, 5 times of copper and 100 times of non-metallic materials. They also have higher thermal conductivity than steel, iron and lead, plus resistant to acid, alkali and organic solvent.