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HOME > J Korean Powder Metall Inst > Volume 2(1); 1995 > Article
유기산염 열분해법으로 합성한 Cu-Ni-Zn 페라이트분말의 특성과 하소조건
Calcined Condition and Characteristic of Cu-Ni-Zn Ferrite Powder Made by Thermal Decomposition of Organic Acid Salt
Journal of Korean Powder Metallurgy Institute 1995;2(1):29-35

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In this study the calcined condition and characteristic of Cu-Ni-Zn ferrite powder were investigated. The Cu-Ni-Zn ferrite powder has been synthesized by the thermal decomposition of the organic acid salt. This process did not require a strict pH control and provided the uniform composition and fine powder with about 0.3 mutextrmm. The XRD diffraction pattern of this powder showed about 50% spinel phase. The optimum calcination was found to be done at 700°C for one hour. After the calcination, the amount of spinel increased to 90%. The distribution of the particle size showed bimodal peaks, one was about 0.5 mutextrmm and the other was about 20 mutextrmm. The large particles of 20 mutextrmm were the agglomeration of fine Particles. The mean Particle size of the powder was about 0.4 mutextrmm. The powder was compacted under 100 MPa pressure and sintered at 1100~ 1250°C for one hour in air. The density of ferrites specimen was a function of the sintering temperature. The higher the temperature, the denser the ferrite. The maximum relative density of the sintered ferrite was about 93% at 1250°C. The grain size of sintered specimen at 1200°C was 5 mutextrmm and homogeneous.

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