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논문 상세정보

$Nb_2O_5$$V_2O_5$의 첨가가 Lithium Ferrite의 소결현상과 B-H Loop 특성에 미치는 영향

Effects of $Nb_2O_5$ and $V_2O_5$ Additions on the Sintering Behavior and B-H Loop Properties of Lithium Ferrite

Abstract

The sintering behavior and B-H loop properties of $Li_{0.5O4}$ with the addition of $Nb_2O_5$ and $V_2O_5$ have been investigated by observation of microstructures and measurement of semi-static hysteresis loops. The sintering temperature was lowered by the additions of $Nb_2O_5$ and $V_2O_5$ and the effect of $V_2O_5$ addition was greater than that of $Nb_2O_5$. The abnormal grain growth was observed at about 100$0^{\circ}C$(d:4.6g/㎤) and 85$0^{\circ}C$(d:4.5g/㎤) in the specimens with the addition of $Nb_2O_5$ and $V_2O_5$ respectively. The addition of $Nb_2O_5$ retulted in a large and uniform grain size, and the addition of $V_2O_5$ resulted in a uniform grain size but the final density was lower than that of the pure specimen. The squareness was increased and the coercive force was decreased by the addition of $Nb_2O_5$, and the squareness was decreased and the coercive force was increased by the addition of $V_2O_5$. These effects could be explained by a large and uniform grain size, and by a lower final density of specimens with the addition of $Nb_2O_5$ and $V_2O_5$ respectively.

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참고문헌 (10)

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