Effect of Calcination Temperature on Densification in Mn-Zn Ferrite

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J. Korean Ceram. Soc. > Volume 36(11); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(11): 1143.

하소 온도가 Mn-Zn Ferrite의 치밀화에 미치는 영향

추호성, 이대희, 이석기¹, 이병교

경북대학교 무기재료공학과
¹경일대학교 공업화학과

Effect of Calcination Temperature on Densification in Mn-Zn Ferrite

ABSTRACT

To study the effect of the degree of phase formation on densification behavior and sintered density in Mn-Zn ferrite, ferrite powders were prepared at various temperatures. The DTMA analysis of the calcined powder showed that densification proceeded by two steps. The maximum shrinkage of first step occured at constant temperature regardless of calcination temperature. Although the starting temperature of second step was constant the temperature of maximum shrinkage in the step moved to lower temperature as the calcination temperature decreased. The density of sintered specimens obtained from powders calcined at 800$^{circ}C$ and 900$^{circ}C$ were higher than the density of sintered specimens obtained from uncalcined powders and powders calcined at 1100$^{circ}C$ in N2 However the density of sintered specimen which was prepared with uncalcined powders and the powders calcined at 1100$^{circ}C$ in N2 increased to 4.95 g/cm3 which was prepared with uncalcied powders and the powders calcined at 1100$^{circ}C$ in N2 increased to 4.95 g/cm3 which was prepared with uncalcined powders and the powders calcined at 1100$^{circ}C$ in N2 increased to 4.95 g/cm3

Key words: Mn-Zn Ferrite, Calcination Temperature