摘要
用溶胶凝胶-自蔓延燃烧法可以快速制备出纳米级的粉体,粒径约为60nm,用粉末-溶胶法所制备的厚膜表面光滑无裂痕。当PVP加入量为0.75%,溶胶浓度为0.15mol/L时所制备的CSBT厚膜a轴择优生长的晶粒较多,且晶粒发育较好。优化工艺后得到的CSBT厚膜样品的厚度为1.5μm,样品晶粒大小均匀,没有裂纹。该样品的剩余极化强度较高,2Pr可达28.7μC/cm2,对应矫顽电场为Ec=121kV/cm,表现出较为优异的铁电性能。
A sol-gel self-propagating combustion method was employed to quickly prepared Ca0.4Sr0.6Bi4Ti4O15 (CSBT) nanopowders with the particle size of 60 nm. Then thick films were obtained from the powders by a powder-sol method. The films are smooth without cracks. When the PVP addition is 0.75% and the sol concentration is 0.15 mol/L, the CSBT thick film prefers the orientation growth along a-axis and the grains grow well. The thickness of the film with the optimized process is 1.5 μm, and its grains are of uniform distribution without cracks. The film possesses excellent ferroelectric properties, with higher remnant polarization 2Pr of 28.7 μC/cm-3 and coercive field (Ec) of 121 kV/cm.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第S1期13-16,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助(81171463,50872075)
关键词
粉末溶胶法
CSBT厚膜
铁电性能
powder-gel route
CSBT thick films
ferroelectric properties
