The(1-x)CoFe2O4+xBaTiO3(x=0.5)magnetoelectric(ME)nano-powders were prepared by molten salt synthesis method and the corresponding ceramics were sintered.The morphology and structure of as-prepared powders and ceramics...The(1-x)CoFe2O4+xBaTiO3(x=0.5)magnetoelectric(ME)nano-powders were prepared by molten salt synthesis method and the corresponding ceramics were sintered.The morphology and structure of as-prepared powders and ceramics were characterized and studied systematically by using XRD,SEM and EDX.In particles,the two phases,CoFe2O4 and BaTiO3,are symbiotic with nano-scale coordinate lattice.A considerable ME coefficient(αE)of about 15.96 mV/A is observed in the x=0.5 ME ceramic,which is attributed to the better interface sintered by using those nano-particles with the two phases and a correct poling strategy on the sample.But the interface between the phases has gone through a separating and recombinating during their sintering process.A two-time sintering process was also performed on those ceramics while theαE of the x=0.5 two-time sintered ceramic drops to 67.7μV/A,which could be explained by the split of the interface during the recombination in the ceramics preparation.展开更多
基金Project(90505008)by the Major Research Program of National Natural Science Foundation of China
文摘The(1-x)CoFe2O4+xBaTiO3(x=0.5)magnetoelectric(ME)nano-powders were prepared by molten salt synthesis method and the corresponding ceramics were sintered.The morphology and structure of as-prepared powders and ceramics were characterized and studied systematically by using XRD,SEM and EDX.In particles,the two phases,CoFe2O4 and BaTiO3,are symbiotic with nano-scale coordinate lattice.A considerable ME coefficient(αE)of about 15.96 mV/A is observed in the x=0.5 ME ceramic,which is attributed to the better interface sintered by using those nano-particles with the two phases and a correct poling strategy on the sample.But the interface between the phases has gone through a separating and recombinating during their sintering process.A two-time sintering process was also performed on those ceramics while theαE of the x=0.5 two-time sintered ceramic drops to 67.7μV/A,which could be explained by the split of the interface during the recombination in the ceramics preparation.
