织构化铌酸钾钠无铅压电陶瓷的性能研究

发布时间：2018-01-13 11:41

本文关键词：织构化铌酸钾钠无铅压电陶瓷的性能研究　出处：《陶瓷学报》2014年06期 　论文类型：期刊论文

【摘要】：以固相法合成的K0.5Na0.5NbO3(KNN)粉体基料,熔盐法合成的片状Sr2Bi4Ti5O18晶粒为模板,采用水系流延法制备织构化KNN无铅压电陶瓷,研究了烧结温度对材料性能的影响。发现烧结温度对陶瓷的体积密度、线收缩率、织构度和压电性能均有重要影响。随着烧结温度的升高,压电性能逐渐提高,1120℃时达到最大值。其中平行于流延方向的压电常数d33达到113pC/N,平面机电耦合系数kp为39.4%,介电常数εT33/ε0为486;而垂直于流延方向d33只有82pC/N,kp为35.5%,介电常数εT33/ε0为456,显示出明显的各向异性。
[Abstract]:Using K0.5Na0.5NbO3 solid-state synthesis (KNN) powder, plate-like Sr2Bi4Ti5O18 particles synthesized by molten salt method as template, preparation of textured KNN lead-free piezoelectric ceramics by aqueous tape casting method. The effects of sintering temperature on the properties of the material. It was found that the volume density of sintering temperature on ceramic, shrinkage rate, texture and the piezoelectric properties have an important effect. With the increase of sintering temperature and piezoelectric properties increased gradually, reached the maximum value at 1120 DEG which is parallel to the direction of casting. The piezoelectric constant d33 reached 113pC/N, planar electromechanical coupling coefficient Kp is 39.4%, the dielectric constant of T33/ epsilon 0 is 486; and perpendicular to the direction of casting d33 only 82pC/N, KP is 35.5%, the dielectric constant of T33/ epsilon 0 is 456, showing obvious anisotropy.

【作者单位】：景德镇陶瓷学院材料科学与工程学院江西省先进陶瓷材料重点实验室;
【基金】：国家自然科学基金(编号:51262011,50962007) 江西省自然科学基金(编号:20114BAB206023,20132BAB206016) 江西省主要学科学术和技术带头人培养计划(编号:2010DD01100) 江西省教育厅科技落地计划(编号:KJLD13076) 景德镇市学科带头人项目
【分类号】：TM282
【正文快照】： 0引言近年来,环境友好型铌酸钾钠(KNN)基无铅压电陶瓷的研究获得了重大的进展,研究人员通过掺杂改性[1-3],或选择合适的成分组元使其与KNN形成准同型相界(MPB)和多型相界(PPT)组成等[4-7],可以将压电常数d33大幅提高,为获得实际应用提供了重要的理论基础。除了通过组分的设计

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