以水热合成的Bi3.15Nd0.85Ti3O12（BNdT）纳米颗粒为原料,用熔盐法合成了BNdT微米薄片,用X射线衍射和透射电镜研究了微米薄片的显微结构,讨论了片状结构的生长机理,并分析了微米薄片的紫外-可见光吸收性能。结果表明：合成的微米薄片是...以水热合成的Bi3.15Nd0.85Ti3O12（BNdT）纳米颗粒为原料,用熔盐法合成了BNdT微米薄片,用X射线衍射和透射电镜研究了微米薄片的显微结构,讨论了片状结构的生长机理,并分析了微米薄片的紫外-可见光吸收性能。结果表明：合成的微米薄片是单晶的层状钙钛矿型结构,横向尺寸为0.2~2.0μm,光学带隙为3.12 e V;随反应温度的升高和反应时间的延长,BNdT微米片横向尺寸逐渐增大;随熔盐含量增加,晶粒尺寸几乎无变化;BNdT晶体结构的大各向异性使其容易形成片状结构。展开更多
Bi0.85Nd0.15FeO3 films were prepared on Pt/Ti/SiO2/Si substrate by a sol-gel method,and annealed at different temperatures.The effect of annealing temperature on the crystal structure,dielectric,ferroelectric,and ferr...Bi0.85Nd0.15FeO3 films were prepared on Pt/Ti/SiO2/Si substrate by a sol-gel method,and annealed at different temperatures.The effect of annealing temperature on the crystal structure,dielectric,ferroelectric,and ferromagnetic properties was investigated.When the Bi0.85Nd0.15FeO3 films were annealed at 490-600°C,the single phase was obtained.Bi0.85Nd0.15FeO3 film annealed at 600°C showed good multiferroic properties with εr of 145 (at 1 MHz),Ms of 44.8 emu/cm3,and 2Pr of 16.6 μC/cm2.展开更多
文摘以水热合成的Bi3.15Nd0.85Ti3O12（BNdT）纳米颗粒为原料,用熔盐法合成了BNdT微米薄片,用X射线衍射和透射电镜研究了微米薄片的显微结构,讨论了片状结构的生长机理,并分析了微米薄片的紫外-可见光吸收性能。结果表明：合成的微米薄片是单晶的层状钙钛矿型结构,横向尺寸为0.2~2.0μm,光学带隙为3.12 e V;随反应温度的升高和反应时间的延长,BNdT微米片横向尺寸逐渐增大;随熔盐含量增加,晶粒尺寸几乎无变化;BNdT晶体结构的大各向异性使其容易形成片状结构。
基金supported financially by the International Science and Technology Cooperation Program of China (Grant No. 2009DFB50470)in part by Global COE Program "Materials Integration (International Center of Education and Research),Tohoku University," MEXT,Japan
文摘Bi0.85Nd0.15FeO3 films were prepared on Pt/Ti/SiO2/Si substrate by a sol-gel method,and annealed at different temperatures.The effect of annealing temperature on the crystal structure,dielectric,ferroelectric,and ferromagnetic properties was investigated.When the Bi0.85Nd0.15FeO3 films were annealed at 490-600°C,the single phase was obtained.Bi0.85Nd0.15FeO3 film annealed at 600°C showed good multiferroic properties with εr of 145 (at 1 MHz),Ms of 44.8 emu/cm3,and 2Pr of 16.6 μC/cm2.
