Journal ArticleDOI
Microstructure and piezoelectric properties of CuO-doped 0.95(K0.5Na0.5)NbO3–0.05Li(Nb0.5Sb0.5)O3 lead-free ceramics
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In this paper, the effects of sintering temperature and the addition of CuO on the microstructure and piezoelectric properties of KNN-5LNS matrix ceramics were investigated.Abstract:
The effects of sintering temperature and the addition of CuO on the microstructure and piezoelectric properties of 0.95(K0.5Na0.5)NbO3–0.05Li(Nb0.5Sb0.5)O3 were investigated. The KNN-5LNS ceramics doped with CuO were well sintered even at 940 °C. A small amount of Cu2+ was incorporated into the KNN-5LNS matrix ceramics and XRD patterns suggested that the Cu2+ ion could enter the A or B site of the perovskite unit cell and replace the Nb5+ or Li+ simultaneously. The study also showed that the introduction of CuO effectively reduced the sintering temperature and improved the electrical properties of KNN-5LNS. The high piezoelectric properties of d33 = 263 pC/N, kp = 0.42, Qm = 143 and tan δ = 0.024 were obtained from the 0.4 mol% CuO doped KNN-5LNS ceramics sintered at 980 °C for 2 h.read more
Citations
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Piezoelectric properties and temperature stabilities of Mn- and Cu-modified BiFeO3–BaTiO3 high temperature ceramics
Huabin Yang,Huabin Yang,Changrong Zhou,Xinyu Liu,Xinyu Liu,Qin Zhou,Guohua Chen,Weizhou Li,Hua Wang +8 more
TL;DR: In this article, the structures, microstructures, electrical properties and the thermal stability have been investigated for the MnO 2 -doped (1−− x )BF-x BT system.
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Large recoverable energy storage density and low sintering temperature in potassium-sodium niobate-based ceramics for multilayer pulsed power capacitors
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Large energy storage density in BiFeO3-BaTiO3-AgNbO3 lead-free relaxor ceramics
Haonan Sun,Xiangjian Wang,Qinzao Sun,Xiaoxiao Zhang,Zhuang Ma,Mengyao Guo,Buwei Sun,Xiaopei Zhu,Qida Liu,Xiaojie Lou +9 more
TL;DR: In this paper, a perovskite structure with morphotropic phase boundary (MPB) and strong relaxor properties of BF-BT-xAN ceramics were fabricated using a modified thermal quenching technique.
Journal ArticleDOI
High piezoelectricity due to multiphase coexistence in low-temperature sintered (Ba,Ca)(Ti,Sn)O3–CuOx ceramics
TL;DR: In this article, a compositional stability of high piezoelectricity along with a high d33 and dS/dE over 600 pC/N and 1000 pm/V was achieved within a wide compositional region.
References
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Journal ArticleDOI
Lead-free piezoceramics
Yasuyoshi Saito,Hisaaki Takao,Toshihiko Tani,Tatsuhiko Nonoyama,Kazumasa Takatori,Takahiko Homma,Toshiatsu Nagaya,Masaya Nakamura +7 more
TL;DR: A lead-free piezoelectric ceramic with an electric-field-induced strain comparable to typical actuator-grade PZT is reported, achieved through the combination of the discovery of a morphotropic phase boundary in an alkaline niobate-based perovskite solid solution, and the development of a processing route leading to highly textured polycrystals.
Journal ArticleDOI
Phase transitional behavior and piezoelectric properties of (Na0.5K0.5)NbO3–LiNbO3 ceramics
TL;DR: In this article, a morphotropic phase boundary between orthorhombic and tetragonal phases is found in the composition range 0.05
Journal ArticleDOI
Piezoelectric and Dielectric Properties of Ceramics in the System Potassium—Sodium Niobate
L. Egerton,Dolores M. Dillon +1 more
TL;DR: In this article, high radial coupling coefficients were observed for compositions having up to 50 mole % sodium niobate additions to potassium Niobate, and the activity diminishes with additional sodium Niobates content and disappears beyond about 98 mole % additions.
Journal ArticleDOI
Hot Pressing of Potassium‐Sodium Niobates
R. E. Jaeger,L. Egerton +1 more
TL;DR: In this article, the authors applied the rate equation of Murray, Live, and Williams for hot-pressing ceramics to obtain a fine microstructure and improved piezoelectric activity.
Journal ArticleDOI
Sintering and Electrical Properties of Lead-Free Na0.5K0.5NbO3 Piezoelectric Ceramics
TL;DR: In this paper, a relatively large remanent polarization was produced, ranging from 16 μC/cm2 for pure Na0.5K 0.5NbO3 (NKN) piezoelectric ceramics to 23 µC/ cm2 for ZnO-added NKN samples.