Fatigue-free Bi3.2La0.8Ti3O12 ferroelectric thin films were successfully prepared on p-Si （100） substrates using metalorganic solution deposition process. The orientation and formation of 5-layers thin films were st...Fatigue-free Bi3.2La0.8Ti3O12 ferroelectric thin films were successfully prepared on p-Si （100） substrates using metalorganic solution deposition process. The orientation and formation of 5-layers thin films were studied under different processing conditions using XRD. Experimental results indicate that increase in annealing time at 700 ℃ after preannealing for 10 min at 400 ℃ can remarkably increase （200）-orientation of the films derived from the precursor solutions with two contents of citric acid. Meanwhile, high content of citric acid increases the film thickness and is conducive to the α-orientation of the films with the preannealing, and low concentration of the solution is conducive to the c-orientation of the films without the preannealing.展开更多
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
文摘Fatigue-free Bi3.2La0.8Ti3O12 ferroelectric thin films were successfully prepared on p-Si （100） substrates using metalorganic solution deposition process. The orientation and formation of 5-layers thin films were studied under different processing conditions using XRD. Experimental results indicate that increase in annealing time at 700 ℃ after preannealing for 10 min at 400 ℃ can remarkably increase （200）-orientation of the films derived from the precursor solutions with two contents of citric acid. Meanwhile, high content of citric acid increases the film thickness and is conducive to the α-orientation of the films with the preannealing, and low concentration of the solution is conducive to the c-orientation of the films without the preannealing.
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。
