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자료유형
학술저널
저자정보
A. Sutthapintu (Mahasarakham University) A. Rittidech (Mahasarakham University)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.25 No.2
발행연도
2020.6
수록면
133 - 139 (7page)
DOI
10.4283/JMAG.2020.25.2.133

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초록· 키워드

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The effect of two-stage sintering of composition ceramics between (0.6)Mg<SUB>0.7</SUB>Zn<SUB>0.3</SUB>Fe₂O₄ and (0.4)Ba<SUB>0.7</SUB>Sr<SUB>0.3</SUB>TiO₃ on crystal structure, microstructure, electrical and magnetic properties was studied. Samples were sintered using a two-stage sintering method with the first sintering temperature (T₁) at 1350°C with different holding times for 30, 50 and 60 min and cooled down to the second sintering temperature (T₂) with sintering temperatures at 900 °C and 1100 °C for 5 h with heating/cooling rate at 10 °C/min. It was found that the densities and shrinkage values tended to slightly increase with the length of holding times at T₁. XRD patterns showed a combination phase between Mg<SUB>0.7</SUB>Zn<SUB>0.3</SUB>Fe₂O₄ and Ba<SUB>0.7</SUB>Sr<SUB>0.3</SUB>TiO₃. The crystallize size and lattice strain were calculated from XRD patterns and found to increase with T₂ sintering. EDX analysis was used to confirm the elemental composition percentage of (0.6)MZF-(0.4)BST. Examination of the microstructure of composition ceramics with SEM revealed grain sizes in the range of 0.852-1.877 μm; with, square shaped grains corresponding to the Mg<SUB>0.7</SUB>Zn<SUB>0.3</SUB>Fe₂O₄ phase and round oval shape corresponding with Ba<SUB>0.7</SUB>Sr<SUB>0.3</SUB>TiO₃ phase. Magnetic behavior and dielectric constant are obviously increased with highly dense ceramics. Finally, the optimal conditions of two stage sintering were obtained for the holding times of T1 about 50-60 min and the second sintering temperature of T2 at 900 °C for 5 h.

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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