摘要
用固相反应法制备了钨掺杂的铋层状结构铁电陶瓷Ca0.7La0.3Bi4(Ti1–xWx)4O15(x=0,0.025,0.100和0.200)。研究了钨掺杂对其介电、压电和铁电性能的影响。结果表明,当x<0.1时掺钨陶瓷已形成单晶相。Ca0.7La0.3Bi4(Ti0.975W0.025)4O15陶瓷具有最佳性能,其εr为183.15,tanδ为0.00446,d33为14pC/N,2Pr为26.7×10–6C/cm2,2Ec为220×103V/cm。SEM显示CaBi4Ti4O15基陶瓷的晶粒为片状。
W-doped bismuth layer structure ferroelectric（BLSFs） Ca0.7La0.3Bi4 （Ti1-xWx） 4O15 （X= 0, 0.025, 0.100, 0.200） ceramics were PrePared by solid-state reaction method. The effects of W doping on the dielectric, piezoelectric and ferroelectric properties of Ca0.7La0.3Bi4（Ti1-xWx）4O15 ceramics were studied. The results show that single phase is formed when x〈0.1 and Ca0.7La0.3Bi4（Ti0.975W0.025）4O15 ceramics have optimal properties： the dielectric constant of 183.15, the dielectric loss of 0.004 46, the piezoelectric strain constant of 14 pC/N, remanent polarization （2Pr） of 26.7 × 10^-6 C/cm^2 and the coercive field （2Ec） of 220 × 10^3 V/cm. SEM micrographs show that the grains of CaBi4Ti4O15-based ceramics are plate-like.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2008年第7期14-16,19,共4页
Electronic Components And Materials
关键词
无机非金属材料
铋层状结构
陶瓷
钨掺杂
介电
铁电
non-metallic inorganic material
bismuth layer structure
ceramics
W-doped
dielectric
ferroelectric
