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Effect of Sintering Temperature and Zinc Content on Some Properties of Li-Zn Ferrites 被引量:2
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作者 A.M.El-Saird (Inorganic Chemistry Dept., National Research Centre, Dokki, Cairo, Egypt)S.B.Hanna(Refractories and Building Materials Dept., National Research Centre, Dokki, Cairo, Egypt) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1996年第5期329-334,共6页
Li-Zn mixed ferrites with composition formula ZnxLi0.5-x/2Fe2.5-x/2O4 (0.2≤x≤0.8) were prepared by the usual ceramic method in 1000~1150℃. The effects of Zn substitution and sintering temperature on the formation, ... Li-Zn mixed ferrites with composition formula ZnxLi0.5-x/2Fe2.5-x/2O4 (0.2≤x≤0.8) were prepared by the usual ceramic method in 1000~1150℃. The effects of Zn substitution and sintering temperature on the formation, densification, microstructure and a.c. electrical conductivity have been studied. Under the effect of changing the firing temperature and Zn content, high sintered Li-Zn ferrite bodies are achieved. More fine structure bodies having high electrical resistance are obtained at high Zn content 展开更多
关键词 LI BDH Effect of Sintering Temperature and Zinc Content on Some Properties of Li-Zn ferrites ZN
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Effect of Nd^(3+) substitution on structural and magnetic properties of Mg-Cd ferrites synthesized by microwave sintering technique 被引量:6
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作者 S.R.Bhongale H.R.Ingawale +1 位作者 T.J.Shinde P.N.Vasambekar 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第4期390-397,共8页
Nd3+ substituted spinel ferrites with formula MgxCd1-xNd0.03Fe1.97O4(x = 0.0.2,0.4,0.6.0.8 and 1.0)were prepared by oxalate co-precipitation method using novel microwave sintering technique. AR grade sulphates were... Nd3+ substituted spinel ferrites with formula MgxCd1-xNd0.03Fe1.97O4(x = 0.0.2,0.4,0.6.0.8 and 1.0)were prepared by oxalate co-precipitation method using novel microwave sintering technique. AR grade sulphates were used as starting chemicals. The samples were sintered at optimized power of 70 W for10 min in a microwave oven(800 W). The structural analysis of these samples was done by using X-ray diffraction, scanning electron microscope and Fourier transform IR techniques. The XRD analysis of the synthesized ferrite confirms the formation of cubic spinel structure of ferrite. The influence of Nd3+substitution on various structural parameters of Mg-Cd ferrites was reported. IR study indicates the spectra contain two intense absorption bands around 600 and 400 cm^(-1) in addition with four extra bands. The magnetic properties of all ferrites were studied by using a vibration sample magnetometer.The crystallite and grain size dependant magnetic properties are observed. The composition Mg_(0.6)Cd_(0.4)Nd_(0.03)Fe_(1.97)O_4 has better magnetic properties that can be used in recording media. The fast synthesis of spinel ferrites is yielded due to use of the microwave sintering technique. 展开更多
关键词 Mg-Nd-Cd ferrite Rare earth Microwave sintering IR study Coercive force
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Effects of Compound Silicate Gangue on Formation of Complex Calcium Ferrite During Sintering Process 被引量:2
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作者 LUO Guo-ping WU Sheng-li +1 位作者 ZHANG Guang-jie WANG Yi-ci 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2013年第3期18-23,共6页
In order to improve the quality of sinter produced by Baiyunebo iron ore concentrate,the effects of compound silicate gangue containing kalium and natrium on formation of complex calcium ferrite were studied using min... In order to improve the quality of sinter produced by Baiyunebo iron ore concentrate,the effects of compound silicate gangue containing kalium and natrium on formation of complex calcium ferrite were studied using mini-sintering test device,optical microscope(OM) analysis and scanning electron microscope(SEM)/energy dispersive X-ray spectroscopy(EDX) analysis.The results show that with the increasing of K2O and Na2O content in sintering samples,K2O and Na2O highly enriched in the glassy phases,the contents of complex calcium ferrite and hematite in sinter decreased and the porosity increased;the mineral microstructure exhibited large cavities and thin framework and became inhomogeneous.The compound silicate gangue containing kalium and natrium significantly inhibited the generation of complex calcium ferrite(SFCA).When the content of K2O and Na2O was higher in samples,a part of K2O and Na2O entered into complex calcium ferrite,which caused the fine grains of SFCA with acicular and columnar to agglomerate into coarse grains,and its bonding effect to iron oxides reduced.The content of K2O and Na2O in sinter had effects on quantity,composition and morphology of complex calcium ferrite. 展开更多
关键词 kalium natrium compound silicate gangue sintering complex calcium ferrite
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