Synthesis and Characterization of (K0.5Na0.5)(Nb0.7Ta0.3)O3 Piezoelectric Ceramics Sintered with Sintering Aid K5.4Cu1.3Ta10O29
Synthesis and Characterization of (K0.5Na0.5)(Nb0.7Ta0.3)O3 Piezoelectric Ceramics Sintered with Sintering Aid K5.4Cu1.3Ta10O29
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DOI：
10.1143/jjap.44.6618
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发表时间：
2005-09
影响因子：
1.5
通讯作者：
M. Matsubara;T. Yamaguchi;K. Kikuta;S. Hirano
中科院分区：
文献类型：
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作者：
M. Matsubara;T. Yamaguchi;K. Kikuta;S. Hirano
研究了助烧剂K5.4Cu1.3Ta10O29（KCT）含量对（K0.5Na0.5）（Nb0.7Ta0.3）O3陶瓷烧结性能和电性能的影响。当KCT含量为0.23 ~ 0.38mol%时，（K0.5Na0.5）（Nb0.7Ta0.3）O3陶瓷为钙钛矿结构，具有较高的致密度。在此成分范围内，（K0.5Na0.5）（Nb0.7Ta0.3）O3陶瓷的电性能也得到了改善。在此KCT含量范围内，（K_（0.5）Na_（0.5））（Nb_（0.7）Ta_（0.3））O_3陶瓷的平面模机电耦合系数（kp）达到0.44-0.46。当KCT含量为0.23 mol %时，获得了680的高机械品质因数（Qm）。当KCT含量为0.23mol%时，（K0.5Na0.5）（Nb0.7Ta0.3）O3陶瓷的场致应变为0.11%，压电常数d33为270 pm/V。
The sinterability and electrical properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics were investigated as functions of K5.4Cu1.3Ta10O29 (KCT) sintering aid content. The (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics showed a perovskite single phase and a high density at KCT contents ranging from 0.23 to 0.38 mol %. In this composition range, the electrical properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics were also improved. The planar-mode electromechanical coupling factor (kp) of (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics reached 0.44–0.46 in this KCT content range. A high mechanical quality factor (Qm) of 680 was obtained at a 0.23 mol % KCT content. The (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics prepared with 0.23 mol % KCT exhibited a field-induced strain of 0.11% at 40 kV/cm and a piezoelectric constant d33 of 270 pm/V.