Abstract
The effect of oxygen partial pressure during sintering process on the electromagnetic properties of Mn-Zn ferrites has been studied. Equilibrium oxygen partial pressure was precisely controlled according to log Po/sub 2/=A-14540/T(K). At low oxygen partial pressure, significant Zn volatilization as well as loss of oxygen was observed. As the oxygen parameter (A) decreased from 8.2 to 7.6, the power loss minimum and the second maximum of initial permeability moved to lower temperatures. These shifts were not clearly observed with oxygen parameters below 7.6. The core sintered at A=7.0 showed the prominent second permeability peak.
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