摘要
用溶胶凝胶法制备了CaxSr1-xBi4Ti4O15(CxS1-xBT)铁电陶瓷前躯体粉体,利用差热分析、X射线衍射分析,确定了该体系的烧结温度和样品的相结构,测试了电学性能。较系统地研究了不同组分对居里温度、铁电性能的影响及相关机理,结果表明,当x=0.6时,CxS1-xBT铁电陶瓷的铁电性良好,剩余极化强度Pr=8.2μC/cm2,矫顽场强Ec=57kV/cm,居里温度为670℃,样品性能的改善与离子极化率、晶格畸变等因素有密切关系。
CaxSr1-xBi4Ti4O15（CxS1-xBT） ferroelectric ceramic powders with x ranging from 0 to 1.0 were prepared by sol-gel method, DTA-TG was used to analyze the characteristics of powders and the chemical and physical changes during sintering process. The crystal structure and electrical properties of the CxS1-xBT ferroelectric ceramics were studied. The CxS1-xBT ferroelectric ceramics sintered at 1150 ℃ exhibited single-phase perovskite structure. The amount of doped Ca in the ceramics had a great influence on the ferroelectric property. The results of the analysis indicated that Ca0.6Sr0.4Bi4Ti4O15 remnant polarization and coercive field were 8.2 μC/cm^2 and 57 kV/cm, respectively. The highest Curie temperature was 670 ℃. That can be attributed to the effects of ionic polarizability and structure distortion.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A01期403-406,共4页
Rare Metal Materials and Engineering
基金
国家重大研究计划(90207025)
山东教育厅项目(03A02)
