摘要
采用熔盐和微晶转化(TMC)等两步法,合成了{100}择优取向的片状BaTiO3模板。采用NaCl-KCl熔盐合成了{0010}择优生长的片状BaBi4Ti4O15前驱体,然后通过微晶转化技术合成了{100}取向生长的BaTiO3模板。采用X线衍射法、热重-差热法分析了微晶转化机理,形貌由扫描电镜观察。结果表明,{0010}取向的Ba-Bi4Ti4O15通过微晶转化技术转化为{100}取向的BaTiO3模板,BaTiO3模板的平均尺寸为6μm,厚度0.6μm;其BaTiO3模板热稳定性好,尺寸合适,适合作理想模板。
The plated-like BaTiO3 template particles with the {100} preferential orientation were synthesized by the two step methods of the molten salt method and the topochemical microcrystal conversion（TMC）.The plate-like BaBi4Ti4O15 precursor with {0010} preferential growth was synthesized by NaCl-KCl molten salt method,then BaTiO3 templates with grain oriented growth along {100} plane was formed by TMC.The X-ray diffraction（XRD） and thermogravimetry-differential thermal analysis（TG-DTA） was used to study the conversion mechanism of plate-like BaTiO3 synthesized by TMC and the microstructure of the product was detected by the scanning electron microscopy.The results showed that the plate-like BaBi4Ti4O15 with {0010} orientation could be converted into the plate-like BaTiO3 template with {100} orientation by TMC.The BaTiO3 template has an average width of 6 μm and a thickness of 0.6 μm.The BaTiO3 particles were characterized by good thermal stability and appropriate size and were very suitable for ideal templates.
出处
《压电与声光》
CAS
CSCD
北大核心
2010年第6期1034-1037,1040,共5页
Piezoelectrics & Acoustooptics
基金
江苏普通高校自然科学研究计划基金资助项目(06KJB430060)
关键词
BATIO3
片状模板
熔盐法
微晶转化法
机理
barium titanate
plated-like template particles
molten salt method
topochemical microcrystal conversion
mechanism
