摘要
利用溶胶凝胶法制备了钙锶铋钛(Ca0.6Sr0.4Bi4Ti4O15简称CSBT-0.6)铁电陶瓷,研究了烧结温度对CSBT-0.6铁电陶瓷相结构、显微结构以及铁电性能的影响,分析了相关机理。发现在1150℃进行烧结,样品晶粒发育较完全,晶粒α轴取向较大,铁电性能优良,剩余极化强度Pr=8.2μC/cm2、矫顽场强Ec=57kV/cm、介电损耗tanδ=18×10-4.4。
Bismuth-layered compound Ca0.6Sr04Bi4Ti4O15（CSBT-0.6）ferroelectric ceramic samples were prepared by sol-gel method. Effect of different sintering temperatures on the crystal structure, microstructure and ferroelectric properties of the CSBT-0.6 ferroelectric ceramics were studied. It is found that crystals developed entirely and a-axis orientation was enhanced at 1150 ℃. At the sintering temperatures, dielectric dissipation of CSBT-0.6 was 0.18%, the highest remnant polarization Pr and coercive field Eo were 8.2 μC/cm^2 and 57 kV/cm, respectively. These results can be explained as follows： Bismuth in the pseudo-perovskite blocks evaporated easily at high sintering temperatures which led to oxygen vacancies.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A01期399-402,共4页
Rare Metal Materials and Engineering
基金
国家重大研究计划(90207025)
山东教育厅项(03A02)
关键词
铁电陶瓷
溶胶凝胶法
剩余极化强度
ferroelectrics ceramics
sol-gel method
remnant polarization
