Abstract
MnZn ferrites were sintered in the presence of a Bi2O3-SiO2 - rich liquid phase. The microstructure of MnZn-ferrite samples that contained various amounts of liquid phase during sintering was investigated. The results revealed that microstructure development and final magnetic permeability depend essentially on the amount of liquid phase present during sintering. The solution-reprecipitation (S-R) process in MnZn ferrites starts when a continuous liquid-phase film is formed during grain growth. The status of the microstructure developed during solid-state sintering prior to the formation of the critical liquid-phase film is essential for the final microstructure developed during liquid-phase-assisted sintering.
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