摘要
采用传统固相反应烧结工艺,制备了新型(Bi0.5Na0.5)0.94Ba0.06Ti1-x(Sc0.5Ta0.5)xO3(BNBT-x ST)无铅陶瓷。研究了B位复合离子掺杂含量对BNBT-x ST无铅陶瓷微观结构、铁电、介电、储能、应变性能的影响。结果表明:ST掺杂固溶于BNBT中,并引起晶格畸变;ST掺杂含量的增加引起陶瓷晶粒尺寸先减小后增大;剩余极化和矫顽场随ST含量的增加而降低,储能密度和储能效率先增大后减小,在x=0.05和60 k V/cm场强下获得最大储能密度(0.48 J/cm3);当x=0.03时,最大场致应变为0.33%;介电温谱表明其为弛豫铁电体,ST的掺杂具有一定的压峰和移峰作用。
A （Bi0.5Na0.5）0.94Ba0.06Ti1-x（Sc0.5Ta0.5）xO3 （BNBT-xST） lead-free ceramic is fabricated by the traditional solid state reaction sintering process. The effects of the doping content of B-site complex ions on the microstructure, ferroelectric, dielectric, energy storage, and strain properties of BNBT-xST lead-free ceramics are investigated. The results show that the ST is dissolved in BNBT and causes lattice distortion. With increasing of ST, the grain size of ceramic decreases first and then increases, the residual polarization and coercive field reduce, energy storage density and energy storage efficiency increase first and then decrease. The maximum energy storage density is 0.48 J/cm3 when x=0.05 and field strength is 60 kV/cm. When x=0.03, the maximum field strain is 0.33%. The temperature spectrum indicates that it is a relaxation ferroelectric, and the ST plays a role in changing the crest size and position.
作者
丘伟
龚海宁
谢航
杨玲
许积文
王华
QIU Wei;GONG Hai-ning;XIE Hang;YANG Ling;XU Ji-wen;WANG Hua(College of Materials Science and Engineering, Guilin University of Electronic Technology, Guangxi Guilin 541004, China)
出处
《电工材料》
CAS
2018年第2期7-11,15,共6页
Electrical Engineering Materials
基金
国家自然科学基金(11664006)
广西自然科学基金(2016GXNSFAA380069)资助
