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Rapid processing of ferrite ceramics with promising magneto-dielectric characteristics

Journal of Advanced dielectrics 2017年第6期7卷 42-47页

作者： Zhuohao Xiao Chuanhu Wang Lie Liu Zhihong Yang Ling Bing Kong School of Materials Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 P.R.China School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Department of Material and Chemical Engineering Bengbu University Bengbu 233030AnhuiP.R.China General Test Systems Inc.Shenzhen 518102GuangdongP.R.China College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P.R.China

Ferrite ceramics,Ni_(0.88)Zn_(0.07)Co_(0.05)Fe_(1.98)O_(4),with the addition of 4 wt.%Bi_(2)O_(3) as sintering aid,were fabricated by using a simple one-step processing without involving the step of calcination.X-ray diffraction(XRD)results indicated that single phase ferrite ceramics can be achieved after sintering at 1000℃ for 2 *** samples demonstrated relative densities in the range of 97-99%.Desired magneto-dielectric properties have been approached by adjusting the sintering temperature and sintering time *** technique is believed to be applicable to other ceramic materials.

关键词： Ferrite dielectric property magnetic property magneto-dielectric

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Evaluation of dielectric,energy storage and multiferroic properties of PrFeO_(3)-PbTiO_(3)solid solutions

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Journal of Advanced dielectrics 2022年第5期12卷 19-31页

作者： Mehak Arora Shubhpreet Kaur Sunil Kumar Parambir Singh Malhi Mandeep Singh Anupinder Singh Department of Physics Guru Nanak Dev UniversityAmritsar 143001 PunjabIndia Department of Chemistry Guru Nanak Dev UniversityAmritsar 143001 PunjabIndia

This work promotes the room temperature energy storage properties of the *** this approach,impacts of PrFeO_(3)doping on PT-based solid solutions(Pb1−xPrxTi1−xFexO_(3),x=0.21,0.22,0.23,0.24,0.25 and 0.26)have been explored.X-ray diffraction(XRD)patterns were used to estimate the crystallographic parameters,confirming the single phase tetragonal *** ferroelectric Curie temperature(Tc FE)is observed to drop from 410 K to below room temperature as the Pr concentration *** ferroelectric P-E loops were used to determine the energy storage values at room *** sample x=0.24 achieved the maximum value of energy storage density of 362.25 mJ/cm^(3)with the efficiency of 40.5%.The ferroelectric P-E loops were used to determine the energy storage values at room *** validity of magnetoelectric coupling in all samples was confirmed by magneto-dielectric studies and found that the sample x=0.24 shows the maximum response with the coupling coefficient(γ)=15.54 g^(2)/emu^(2).

关键词： Ferroelectrics energy storage multiferroics magneto-dielectric coupling coefficient.

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Ferrimagnetism and Ferroelectricity of the Composite Matrix: SrBi2Nb2O9(SBN)X-BaFe12019(BFO)100–X

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Materials Sciences and Applications 2012年第1期3卷 6-17页

作者： M. J. S. Rocha M. C. C. Filho K. R. B. Theophilo J. C. Denardin I. F. Vasconcelos E. B. Araújo A. S. B. Sombra 不详

A study of the dielectric, magnetic and structural properties of composites based on M-type barium hexaferrite BFO (BaFe12O19) and SBN (SrBi2Nb2O9) is presented. The magneto-dielectric matrix composite (SrBi2Nb2O9)x(BaFe12O19)100–x, (x = 0,25,50,75 and 100 wt%) were prepared by using a new procedure based in the solid state method. X-Ray powder diffraction patterns, Raman and Infrared spectroscopy, M?ssbauer spectroscopy and scanning electron microscopy (SEM) were carried out for better understanding of the microstructural, dielectric and magnetic properties. Radiofrequency (RF) dielectric permittivity, dielectric loss measurements and magnetic and electric hysteresis loops properties are also discussed throughout this paper. The hysteresis loops showed that composite samples preserve the ferrimagnetism and ferroelectricity for hexaferrite when SBN is added to the composite (BFO25P), although they become less coercive. In addition, the effects of organic binders group (TEOS, PVA and glycerin) on structural properties were also investigated.

关键词： Composites magneto-dielectric Materials

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