An induction furnace includes an induction coil, an electrically
non-conductive crucible having an inner diameter disposed within the
induction coil, and an electrically conductive member disposed below the
crucible and having an outer diameter which is further from the induction
coil than is the inner diameter of the crucible. Due to the
non-conductive nature of material disposed within the crucible at lower
temperatures, the induction coil initially inductively heats the
conductive member, which transfers heat to the material to melt a portion
of the material. Once the material is susceptible to inductive heating
(usually upon melting) the susceptible material is inductively heated by
the induction coil. During the process, inductive heating of the material
greatly increases as inductive heating of the conductive member greatly
decreases due to low resistivity of the molten material and due to the
molten material being closer to the coil than is the conductive member.