Induction Curing Ceramic Fiber

Objective To heat-cure a NextelTM Ceramic fiber
Material Ceramic fiber 30,000 (9,145) ft(m) Steel tube
Temperature indicating paint
Temperature 1300(700) ºF(ºC)
Frequency 70 kHz
Equipment Power of 45kW, 50-450 kHz solid-state induction power supply with a remote heat station containing two, 0.75 mF capacitors (total 0.375 mF). A custom designed induction heating coil.
Process A special steel tube and coil combination is used to build an induction heating oven to cure the fiber on a continuous basis. The ceramic fiber travels in an alumina tube inside a hot steel tube. The ID of the alumina is 0.5(13) in(mm) to prevent any build up of the residue. Temperature indicating paint is used to ensure that the fiber is heated to 1300(700) ºF(ºC) at processing speed. The fiber can be heated to 1300(700) ºF(ºC)
at a speed of 100(30.5) f/m(m/m) with this setup.
Results/Benefits · Effective removal of the binder in the ceramic fiber
· Ability to continuously process fiber with induction heat. Other non-continuous heating methods don’t work.