Sr_(1-x)Ba_xBi_4Ti_4O_(15)铁电陶瓷性能研究  

Study on properties of Sr_(1-x)Ba_xBi_4Ti_4O_(15) ferroelectric ceramics

作　　者：张志德[1] 林霖[1] 金玲 

机构地区：[1]南方医科大学生物医学工程学院,广东广州510515 [2]广东省粤晶高科股份有限公司,广东广州510663

出　　处：《电子元件与材料》2010年第3期12-14,共3页Electronic Components And Materials

摘　　要：采用传统固相反应法制备了Sr1–xBaxBi4Ti4O15(x=0～1.0)铁电陶瓷,研究了Ba取代量对其烧结性能和介电性能的影响。结果表明,适量Ba取代促使陶瓷样品烧结温度由1240℃降至1130℃左右,tanδ降至20×10–4,体积电阻率ρv提高一个数量级,同时居里峰显著展宽,居里温度tC下降。当x=0.7时,在1130℃烧结6h获得的陶瓷样品综合介电性能较好:εr≈150,tanδ=53×10–4,ρv=1.7×109Ω·m,tC≈430℃。Sr1–xBaxBi4Ti4O15（x=0～1.0） ferroelectric ceramics were prepared using the traditional solid-state reaction method,and the effects of Ba substitution amounts on the sintering properties and dielectric properties of prepared ceramics were studied.The results show that the sintering temperature is reduced from 1 240 ℃ to about 1 130 ℃,the dielectric loss（tanδ） is decreased to 20×10–4,the volume resistivity（ρv） is improved by an order of magnitude,the Curie peak is notably widened and the Curie temperature（tC） is decreased for ceramic samples with proper Ba substitution amounts.When x=0.7,the ceramic sample sintered at 1 130℃ for 6 h has better comprehensive dielectric properties as follows：εr≈150,tanδ=53×10–4,ρv=1.7×109Ω·m and tC≈430℃.

关 键 词：SRBI4TI4O15 铁电陶瓷 A位取代 体积电阻率 

分 类 号：TN373[电子电信—物理电子学]