Structure and electrical properties of (0.965 − x)(K0.48Na0.52)NbO3–xBiGaO3–0.035(Bi0.5Na0.5)ZrO3 piezoelectric ceramics

(0.965 − x)(K0.48Na0.52)NbO3–xBiGaO3–0.035(Bi0.5Na0.5)ZrO3 [(0.965 − x)KNN–xBG–BNZ] lead-free piezoelectric ceramics were prepared using normal sintering for improving the piezoelectric properties and temperature stability of KNN-based ceramics.

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Electrical properties and temperature stability of a new kind of lead-free piezoelectric ceramics

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/41/24/245401 ◽

2008 ◽

Vol 41 (24) ◽

pp. 245401 ◽

Cited By ~ 10

Author(s):

Yuanyu Wang ◽

Jiagang Wu ◽

Dingquan Xiao ◽

Bin Zhang ◽

Wenjuan Wu ◽

...

Keyword(s):

Electrical Properties ◽

Temperature Stability ◽

Piezoelectric Ceramics ◽

Lead Free

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Dielectric and Piezoelectric Properties of Lead Free (1-x-y)Na1/2Bi1/2TiO3-xBaTiO3-yBiFeO3 Piezoelectric Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.492.194 ◽

2011 ◽

Vol 492 ◽

pp. 194-197 ◽

Cited By ~ 1

Author(s):

Yue Fang Wang ◽

Xiu Jie Yi ◽

Wei Pan ◽

Guo Zhong Zang ◽

Juan Du

Keyword(s):

Electrical Properties ◽

Dielectric Loss ◽

Phase Structure ◽

Perovskite Structure ◽

Piezoelectric Properties ◽

Piezoelectric Ceramics ◽

Lead Free ◽

Compositional Dependence ◽

Pure Perovskite Structure ◽

Dielectric And Piezoelectric Properties

Lead-free (1-x-y)Na1/2Bi1/2TiO3-xBaTiO3-yBiFeO3 ceramics were synthesized by ordinary sintering technique. The compositional dependence of phase structure and electrical properties of the ceramics was systematically investigated. All samples possessed pure perovskite structure. The dielectric and piezoelectric properties of ceramics were investigated with the amount of different BiFeO3 substitutions. The addition of BiFeO3 can not only decrease Ec and Pr but also lead to a significant degradation of the dielectric loss tanδ.

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Investigation on Electrical Properties of CaCu3Ti4O12-Modified (Na,Bi)TiO3-BaTiO3 Lead Free Piezoceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.887-888.289 ◽

2014 ◽

Vol 887-888 ◽

pp. 289-293

Author(s):

Jing Chang Zhao ◽

Zhen Lai Zhou

Keyword(s):

Electrical Properties ◽

Electromechanical Coupling ◽

Piezoelectric Properties ◽

Piezoelectric Ceramics ◽

Electromechanical Coupling Factor ◽

Coupling Factor ◽

Mechanical Quality Factor ◽

Lead Free ◽

Lead Free Ceramics ◽

Structure Morphology

(Na,Bi)TiO3-BaTiO3lead free piezoelectric ceramics were fabricated with modification of CaCu3Ti4O12additives. The phase structure, morphology, dielectric and piezoelectric properties of prepared samples were investigated, respectively. It was found that CaCu3Ti4O12additives evidently improve the polarization properties of (Na,Bi)TiO3-BaTiO3lead free ceramics and the obtained samples exhibit an excellent piezoelectric properties (electromechanical coupling factorKp=31%, mechanical quality factorQm=151 and piezoelectric constantd33=160pC/N). According to results, the effect of CaCu3Ti4O12additives on electrical properties of (Na,Bi)TiO3-BaTiO3lead free piezoelectric ceramics is discussed.

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Effects of Alkali Metal Content and Sintering Temperature on the Structure and Electrical Properties of (Na0.52K0.48) 0.94+xLi0.06-xNb0.94Sb0.06O3 Lead-Free Piezoelectric Ceramics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.459 ◽

2013 ◽

Vol 423-426 ◽

pp. 459-462

Author(s):

Hai Tao Li ◽

Xiao Bo Hong ◽

Hong Qiong Huang ◽

Jin Feng Gong ◽

Zhi Yuan Cheng ◽

...

Keyword(s):

Electrical Properties ◽

Metal Content ◽

Electromechanical Coupling ◽

Piezoelectric Properties ◽

Sintering Temperature ◽

Piezoelectric Ceramics ◽

Lead Free ◽

Electromechanical Coupling Coefficient ◽

Sintering Behavior ◽

Orthorhombic Symmetry

Alkali niobate lead-free piezoelectric ceramics with nominal compositions [(Na0.52K0.48)0.94+ xLi0.06-x](Nb0.94Sb0.06)O3 ((NK)xLNS) were prepared by normal sintering. Crystalline phase, piezoelectric properties and sintering behavior of (NK)xLNS ceramics were investigated with a special emphasis on the influence of alkli metal content. The x-ray diffraction patterns and the corresponding calculation of lattice parameters indicated that a phase transition from tetragonal to orthorhombic symmetry occurs as x=0.01, resulting in enhanced piezoelectric constant and planar electromechanical coupling coefficient of 266 pC/N and 38.5%, respectively. With x=0.01, the ceramics sintered at 1050 C show higher density and better electrical properties. Our results indicate the importance of sintering temperature and elaborate compositional control for enhancing piezoelectric properties in niobate-based ceramics.

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Enhanced Electrical Properties of Lead-Free Piezoelectric KNLN-BZ-BNT Ceramics With the Modification of Sm3+ Ions

Frontiers in Materials ◽

10.3389/fmats.2021.695330 ◽

2021 ◽

Vol 8 ◽

Author(s):

Yi Quan ◽

Lingyan Wang ◽

Wei Ren ◽

Jinyan Zhao ◽

Jian Zhuang ◽

...

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Electrical Properties ◽

Piezoelectric Properties ◽

Piezoelectric Ceramics ◽

High Thermal Stability ◽

Lead Free ◽

Environment Friendly ◽

Good Thermal Stability ◽

Good For

Environment-friendly lead-free piezoelectric ceramics with great properties and high thermal stability are desired in the industry. In this work, the Sm3+-modified lead-free 0.915(K0.45Na0.5Li0.05)NbO3–0.075BaZrO3–0.01(Bi0.5Na0.5)TiO3 (KNLN-BZ-BNT) ceramics are prepared. The piezoelectric properties are improved with the introduction of Sm3+, and the optimal properties (d33 = 325 pC/N and d33* = 384 pm/V) are achieved in the ceramic modified with 0.3 mol% Sm3+ ions. Meanwhile, this sample shows good thermal stability such that the values of d33* decreased less than 20% when the temperature raised from 30 to 180oC. These results show the Sm3+-modified KNLN-BZ-BNT ceramics are good for further applications even under high temperature.

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Phase Structure and Electrical Properties of Bi1/2Na1/2TiO3-KNbO3 Lead-Free Piezoelectric Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.184 ◽

2007 ◽

Vol 336-338 ◽

pp. 184-187 ◽

Cited By ~ 3

Author(s):

Wen Zhong Lu ◽

Gui Fen Fan ◽

Xiao Hong Wang ◽

Fei Liang

Keyword(s):

Dielectric Constant ◽

Electrical Properties ◽

Piezoelectric Properties ◽

Extreme Values ◽

Piezoelectric Ceramics ◽

Lead Free ◽

Fabrication Technique ◽

X Ray Diffraction ◽

Depolarization Temperature ◽

X Ray

Lead-free (1-x) Bi1/2Na1/2TiO3-xKNbO3 (x=0, 0.01, 0.02, 0.04, 0.05 0.06, 0.10) piezoelectric ceramics were prepared by conventional ceramics fabrication technique. The results of x-ray diffraction (XRD) show that these ceramics possess pure perovskite structures with a symmetry transition from rhombohedral to cubic at about x = 0.05. The piezoelectric properties of these ceramics were reported and found to reach extreme values at x = 0.04 with d33 up to 113pC/N and kp up to 22%. The temperature dependence of dielectric constant and dielectric loss of these ceramics were also investigated. The Curie temperature and depolarization temperature dropped with the increase of KNbO3 amount.

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AC Conductivity and Dielectric Properties of BiScO3–PbTiO3 Piezoelectric Ceramics

Science of Advanced Materials ◽

10.1166/sam.2021.3992 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1807-1811

Author(s):

Jae-Hoon Ji ◽

Yoo-Young Oh ◽

Bo Su Kim ◽

Wook-Hee Han ◽

Jung-Hyuk Koh

Keyword(s):

Dielectric Properties ◽

Electrical Properties ◽

Ac Conductivity ◽

Piezoelectric Properties ◽

Piezoelectric Materials ◽

Ferroelectric Properties ◽

Temperature Stability ◽

Piezoelectric Ceramics ◽

Dielectric Behavior ◽

Wide Range

Bi-based BiMeO3 (where Me is a transition metal) has been extensively studied owing to its outstanding ferroelectric properties. The dielectric and electrical properties of piezoelectric ceramics can be enhanced by the addition of Bi-based materials such as BiAlO3, BiScO3 , and Bi(Mg, Ti)O3. Among them, BiScO3–PbTiO3 ceramics have shown excellent piezoelectric properties and temperature stability near the morphotropic phase boundary (MPB) region. Meanwhile, it is important to study the electrical properties of piezoelectric materials such as dielectric permittivity, conductivity of ferroelectric compounds, since dielectric and conductivities are related to pyroelectricity and piezoelectricity. In this study, the AC conductivity and dielectric properties of BiScO3–PbTiO3 ceramics were investigated with a wide range of frequencies and temperatures. Especially,the effect of PbTiO3 content on dielectric behavior of the BiScO3–PbTiO3 system was intensively studied by impedance spectroscopy.

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Effect of LiNbO3 on Piezoelectric Properties of K0.5Na0.5NbO3 Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2037 ◽

2010 ◽

Vol 654-656 ◽

pp. 2037-2040

Author(s):

Ming He Cao ◽

Zhuo Li ◽

Fan Li ◽

Hua Hao ◽

Han Xing Liu

Keyword(s):

Phase Transition ◽

Solid State ◽

Electrical Properties ◽

Phase Structure ◽

Composition Range ◽

Piezoelectric Properties ◽

Piezoelectric Ceramics ◽

Lead Free ◽

Polymorphic Phase Transition ◽

State Process

Lead-free (1-x)K0.5Na0.5NbO3–xLiNbO3 piezoelectric ceramics have been prepared by a conventional solid state process. The phase structure and the electrical properties of the ceramics were studied. A polymorphic phase transition (PPT) between the orthorhombic and tetragonal phases was identified in the composition range of 0.08<x<0.10. The ceramics near the PPT show better piezoelectric properties. At a level of 10mol% LiNbO3, the sample sintered at 1100oC for 1h exhibits optimal piezoelectric properties.

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