0.5Ba(Ti_(0.8)Zr_(0.2))O_3-0.5(Ba_(0.7)Ca_(0.3))TiO_3压电薄膜的摩擦、磨损性能  

Friction and wear performance of the 0.5Ba(Ti_(0.8)Zr_(0.2))O_3-0.5(Ba_(0.7)Ca_(0.3))TiO_3piezoelectric film

作　　者：张艳[1] 王增梅[2,3] 陈云飞[1] 郭新立[2] 孙伟[2] 袁国亮[4] 殷江[5] 刘治国[5] 

机构地区：[1]东南大学,江苏省微纳生物医疗器械设计与制造重点实验室,南京211189 [2]东南大学材料科学与工程学院,江苏省土木工程材料重点实验室,南京211189 [3]山东大学,晶体材料国家重点实验室,济南250100 [4]南京理工大学材料科学与工程学院,南京210094 [5]南京大学材料科学与工程系,固体微结构物理国家重点实验室,南京210093

出　　处：《物理学报》2013年第6期378-384,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2012CB619401);国家自然科学基金(批准号:51002029;11134004);教育部博士点科研专项基金(批准号:20100092120039);晶体材料国家重点实验室开放课题(批准号:KF1107)资助的课题~~

摘　　要：具有准同型相界组分的0.5Ba(Ti0.8Zr0.2)O3-0.5(Ba0.7Ca0.3)TiO3(BZT-0.5BCT)陶瓷,表现出优异的铁电、压电性能,作为一种具有潜在应用前景的无铅压电材料得到广泛关注.本文采用溶胶-凝胶方法在Si(100)基底上制备了BZT-0.5BCT压电薄膜.使用原子力显微镜和扫描电子显微镜测量得到样品的形貌图,形貌图表明该方法制备的无铅压电薄膜表面光滑,晶粒大小均匀、呈半球形,直径为80—100nm,厚度为1.7μm,膜的内部有气孔.摩擦力实验表明,压电薄膜样品与硅针尖之间存在静电力的作用,导致其摩擦力远大于硅针尖与SiO2之间的摩擦力,但是两者的摩擦系数基本相同.划痕实验表明,BZT-0.5BC薄膜具有很强的法向承载能力,但是切向抗磨损能力差,样品的平均弹性模量为23.64GPa±5GPa,其硬度为2.7—4GPa,两者均略低于压电陶瓷Pb(Zr,Ti)O3材料的体态值.As a lead-free piezoelectric material with potential application, 0.5Ba（Ti0.8Zr0.2）O3-0.5（Ba0.7Ca0.3）TiO3 （BZT-0.5BCT） ceramics, which has a morphotropic phase boundary composition, deserves much attention due to its excellent ferroelectric and piezoelectric properties. BZT-0.5BCT lead-free piezoelectric film has been synthesized on a Si （100） substrate by Sol-Gel process. The topography of the film measured using an atomic force microscope and a scanning electron microscope shows that the surface of the prepared film is smooth, and the grain is in the shape of hemisphere with a diameter of 80-100 nm. The film is 1.7 μm in thickness, with pores inside. Friction experiments show that the friction between the tip and the piezoelectric film is much larger than that between the tip and the SiO2 substrate, because of the existence of electrostatic force between the film and the silicon tip. However, the friction coefficients obtained are approximately equal. Nano-scratch experiments show that the BZT-0.5BCT film has a high normal carrying capacity, but a poor tangential wear resistance. The average elastic modulus of the film is 23.64 GPa ± 5 GPa, and its hardness is 2.7-4 GPa, both being slightly lower than those of the bulk value in PZT ceramics.

关 键 词：BZT-BCT薄膜 纳米摩擦力 纳米压痕 纳米划痕 

分 类 号：TM282[一般工业技术—材料科学与工程]