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Na_(1/2)Bi_(1/2)TiO_3-BaTiO_3系陶瓷压电性及弛豫相变研究 被引量:75

Piezoelectric Property and Relaxation Phase Transition of Na_(1/2)Bi_(1/2)TiO_3-BaTiO_3 System
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摘要 系统研究了(1-x)Na1/2Bi1/2TiO3-xBaTiO3(x=0.02、0.04、0.06、0.08、0.10)无铅压电陶瓷系统的相界、材料压电性能,弛豫特性及相变.这个系统的陶瓷材料具有Kt/Kp较大,频率常数比较高等特点.X-ray衍射结构分析发现此系统的相界在0.04<x<0.06之间;材料的一些主要性能在相界附近达到极值.利用介电系数-温度曲线,并结合热激电流曲线对此系统的弛豫性进行研究和分析;初步研究了各配方组成的铁电-顺电的相变过程,发现在一定的组成范围内,材料在由铁电相向顺电相的转变过程中经历了一个过渡相区. For (1-x)Na1/2Bi1/2TiO3-xBaTiO3(x=0.02, 0.04, 0.06, 0.08, 0.10) lead-free ceramic system the morphotropic boundary, piezoelectric property, relaxation property and phase transition were investigated. The piezoelectric ceramics of this system possess large ratios of Kt/Kp and high frequency constants. According to XRD patterns, the morphotropic boundary lies in the composition range of 0.04< x <0.06. The main physical properties of this system can reach extreme values near the morphotropic boundary. The relaxation property of this system was studied by using dielectric constant-temperature curves and thermally stimulated depolarization current (TSDC) curves. Phase transition from ferroelectric to paraelectric phase was also primarily discussed and it was found out that the ceramics within a composition range possess transitional phase region between ferroelectric phase and paraelectric phase.
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2000年第5期815-821,共7页 Journal of Inorganic Materials
关键词 压电陶瓷 准同型相界 钛酸钡 驰豫性相变 NBT x)Na1/2Bi1/2TiO3-xBaTiO3 lead-free piezoelectric ceramics morphotropic boundary relaxation phase transition transitional phase region
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  • 1王天宝,王列娥,卢永康,周道鹏.系富钠区陶瓷固溶体的相变研究[J]硅酸盐学报,1987(03).

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