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采用传统固相法制备了[(Na0.6K0.4)0.985Bi0.015](Nb0.97Ti0.03)O3-xmol%Mn(NKBNT-xMn,0.00≤x≤1.50)无铅压电陶瓷,研究了Mn掺杂对NKBNT系陶瓷微观结构与电性能的影响。结果表明所有陶瓷样品均为钙钛矿型四方相结构。适量引入Mn可以有效降低NKBNT系陶瓷的烧结温度并使其晶粒尺寸变的细化且均匀,同时增强了陶瓷的介电弥散性。随着Mn含量的增加,NKBNT系陶瓷的压电性能虽略有降低,但其机械品质因数Qm得到显著提高,表现出"硬性"掺杂效应。当x=0.50时,样品各项综合性能达到最佳值:压电常数d33=201 pC/N,平面机电耦合系数kp=33%,机械品质因数Qm=140。
Abstract：Lead-free piezoelectric ceramic NKBNT-xMn(0.00 ≤ x ≤ 1.50) were synthesized by traditional solid state reaction. The effects of Mn addition on the microstructure and electrical properties of ceramics were investigated. It is found that all samples have a single perovskite structure with tetragonal phase. After Mn doping, the sintering temperature of NKBNT ceramics was decreased and the size of grain becomes small and unanimous. With appropriate amount of Mn addition, the diffuseness of the ceramic is improved, while the piezoelectric coefficient is lightly lowered. However, the mechanical quality factor Qm is largely enhanced, behave as "hard" doping effect. When x=0.50, the ceramic achieves an optimum performance: piezoelectric constant d33=201 pC/N, planar electromechanical coupling coefficient kp=33%, the mechanical quality factor Qm=140.
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基本信息:
DOI：10.16521/j.cnki.issn.1001-9642.2014.08.020
中图分类号:TM282
引用信息:
[1]陈超,江向平,易文斌,等.Mn掺杂[(Na_(0.6)K_(0.4))_(0.985)Bi_(0.015)](Nb_(0.97)Ti_(0.03))O_3无铅压电陶瓷的性能研究[J].中国陶瓷,2014,50(08):17-20+26.DOI:10.16521/j.cnki.issn.1001-9642.2014.08.020.
基金信息:
国家自然科学基金(91022027,51262009);; 江西省自然科学基(2012BAB202001,2012BAB203019);; 江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800);; 江西省高等学校“先进陶瓷材料”科技创新团队;; 江西省教育厅项目(GJJ13629,GJJ13630)
2014-08-05
2014-08-05