Abstract
Spark plasma sintering is a powerful method to produce fine grain dense ferrite at low temperature. However the process, usually conducted in neutral atmosphere in a carbon die, yields carbon surface deposition and the reduction of Fe3+ into Fe2+. It is shown that subsequent annealing in air can remove carbon and under some conditions produce complete oxidation of Fe2+ ions. Regular values of the resistivity and permittivity (resp., 1 MΩm, 13 ε0) are recovered for most samples annealed at temperatures not higher than 750 °C. A relatively high value of the permeability (up to 240) and a high merit factor (μs×fr>5 GHz) have been achieved.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
