The piezoelectric and dielectric properties of Ca-additive Sm-modified PbTiO3 ceramics intended for surface acoustic wave devices

Chen, Te-Yi; Chu, Sheng−Yuan

doi:10.1016/s0955-2219(03)00017-7

Cited by 17 publications

(5 citation statements)

References 16 publications

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“…Meanwhile, because of their very small planar or lateral electromechanical coupling coefficient, PbTiO 3 and PbNb 2 O 6 -based ceramics make the width-to-thickness ratio of a transducer element more than one. [2][3][4][5][6][7][8] Here, piezoelectric transducers are firstly of a mechanical system and thus both mechanical and piezoelectric properties of ferroelectric ceramics play a key role in the practical piezoelectric transducer performances. These years, ferroic structural phase transitions of PbTiO 3 and PbNb 2 O 6based piezoceramics have been widely studied to promote their mechanical and piezoelectric properties and to design novel anisotropic piezoceramics.…”

Section: Introductionmentioning

confidence: 99%

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Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature

Cao

2014

Jpn. J. Appl. Phys.

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In this paper, ferroelectric phase transitions of Pb0.6− x Ca x Bi0.4(Ti0.75Zn0.15Fe0.1)O3 with x ≤ 0.20 ceramics were experimentally measured and a change from first-order to relaxor was found at a critical composition x ∼ 0.19. With increasing Ca content of x ≤ 0.18, Curie temperature and tetragonality was found decrease but piezoelectric constant and dielectric constant increase in a quadratic polynomial relationship as a function of x, while the ferroic Curie temperature and ferroelastic ordering parameter of tetragonality are correlated in a quadratic polynomial relationship. Near the critical composition of ferroic phase transition from first-order to relaxor, the Pb0.42Ca0.18Bi0.4(Ti0.75Zn0.15Fe0.1)O3 and 1 mol % Nb + 0.5 mol % Mg co-doped Pb0.44Ca0.16Bi0.4(Ti0.75Zn0.15Fe0.1)O3 ceramics exhibit a better anisotropic piezoelectric properties than those commercial piezoceramics of modified-PbTiO3 and PbNb2O6. At last, those factors including reduced mass of unit cell, mismatch between cation size and anion cage size, which affect ferroic Curie temperature and ferroelastic ordering parameter (tetragonality) of tetragonal ABO3 perovskites, are analyzed on the basis of first principle effective Hamiltonian and the reduced mass of unit cell is argued a more universal variable than concentration to determine Curie temperature in a quadratic polynomial relationship over various perovskite-structured solid solutions.

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Section: Introductionmentioning

confidence: 99%

“…For instance, substituting PbTiO 3 with Ca or La at the A-site decreases its negative TEC to about zero and makes their ceramics become mechanically strong and enhances their electromechanical anisotropy. [6][7][8]21,22) However, their Curie temperature and tetragonality decrease with increasing substitution amount.…”

Section: Introductionmentioning

confidence: 99%

Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature

Cao

2014

Jpn. J. Appl. Phys.

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“…Many researchers have focused on pure ZnO film and attempted to improve its properties by optimizing the preparation conditions, but the results are not distinct [20][21][22]. Doping is a good method to improve the piezoelectric properties of Pb-based piezoelectric materials [23][24][25][26][27], and there are many successful examples to improve the properties of ZnO films by doping. Doping with Al and Ga can improve the quality and conductivity of ZnO films [28,29].…”

Section: Introductionmentioning

confidence: 99%

Giant piezoresponse and promising application of environmental friendly small-ion-doped ZnO

Pan

Luo

Yang

et al. 2011

Sci. China Technol. Sci.

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In recent years, with the growing concerns on environmental protection and human health, new materials, such as lead-free piezoelectric materials, have received increasing attention. So far, three types of lead-free piezoelectric systems have been widely researched, i.e., perovskites, bismuth layer-structured ferroelectrics, and tungsten-bronze type ferroelectrics. This article presents a new type of environmental friendly piezoelectric material with simple structure, the transition-metal(TM)-doped ZnO. Through substituting Zn 2+ site with small size ion, we obtained a series of TM-doped ZnO with giant piezoresponse, such as Zn 0.975 V 0.025 O of 170 pC/N, Zn 0.94 Cr 0.06 O of 120 pC/N, Zn 0.913 Mn 0.087 O of 86 pC/N and Zn 0.988 Fe 0.012 O of 127 pC/N. The tremendous piezoresponses are ascribed to the introduction of switchable spontaneous polarization and high permittivity in TM-doped ZnO.The microscopic origin of giant piezoresponse is also discussed. Substitution of TM ion with small ionic size for Zn 2+ results in the easier rotation of noncollinear TM-O1 bonds along the c axis under the applied field, which produces large piezoelectric displacement and corresponding piezoresponse enhancement. Furthermore, it proposes a general rule to guide the design of new wurtzite semiconductors with enhanced piezoresponses. That is, TM-dopant with ionic size smaller than Zn 2+ substitutes for Zn 2+ site will increase the piezoresponse of ZnO significantly. Finally, we discuss the improved performances of some TM-doped ZnO based piezoelectric devices.

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“…The Sm-modified PbTiO 3 ceramic doped with Ca was shown to have an increased thickness coupling factor, k t [4]. Because Sr and Ca belong to the alkaline-earth metal in the periodic table, we have shown that the TCF values of Ca additive Sm-modified PbTiO 3 ceramics are positive and that of Sr additive samples are negative [13], [14], so it is possible to fabricate the sample with zero temperature coefficient of resonant frequency by doping both of Ca and Sr into Sm-modified lead titanate ceramics.…”

Section: Introductionmentioning

confidence: 72%

Fabrication of modified lead titanate piezoceramics with zero temperature coefficient and its application on SAW devices

Chu

Chen

2004

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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The Samarium-modified, lead titanate ceramics with a composition of (Pb0:67Ca0:15Sr0:06Sm0:08) (Ti0:98Mn0:02)O3 were prepared by conventional mixedoxide method. By properly varying the sintering and poling conditions, the samples with zero temperature coefficient of resonant frequency were fabricated. The piezoelectric and dielectric properties were measured; it showed that the samples with zero temperature coefficient still keep highthickness, electromechanical coupling coefficient, kt(>0.55), and small planar electromechanical coupling coefficient, kp.Surface acoustic wave (SAW) filters were fabricated; and the properties, including phase velocity and electromechanical coupling coefficient, were measured. Microstructural and compositional analyses have been carried out using scanning electron microscopy and x-ray diffraction.

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The piezoelectric and dielectric properties of Ca-additive Sm-modified PbTiO3 ceramics intended for surface acoustic wave devices

Cited by 17 publications

References 16 publications

Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature

Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature

Giant piezoresponse and promising application of environmental friendly small-ion-doped ZnO

Fabrication of modified lead titanate piezoceramics with zero temperature coefficient and its application on SAW devices

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The piezoelectric and dielectric properties of Ca-additive Sm-modified PbTiO3 ceramics intended for surface acoustic wave devices

Cited by 17 publications

References 16 publications

Ferroic phase transition of tetragonal Pb0.6− xCaxBi0.4(Ti0.75Zn0.15Fe0.1)O3 ceramics: Factors determining Curie temperature

Ferroic phase transition of tetragonal Pb0.6− xCaxBi0.4(Ti0.75Zn0.15Fe0.1)O3 ceramics: Factors determining Curie temperature

Giant piezoresponse and promising application of environmental friendly small-ion-doped ZnO

Fabrication of modified lead titanate piezoceramics with zero temperature coefficient and its application on SAW devices

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Product

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Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature

Ferroic phase transition of tetragonal Pb_0.6− _xCa_xBi_0.4(Ti_0.75Zn_0.15Fe_0.1)O₃ ceramics: Factors determining Curie temperature