The Experimental Investigations on Frequency Dependence of Ferroelectric Properties in Soft PZT-5 Ceramics

2012 ◽  
Author(s):  
Li-Wei Jin ◽  
Yu Su
Keyword(s):  
Frequency Dependence ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Domain Switching ◽  
Ferroelectric Properties ◽  
Ferroelectric Ceramics ◽  
Experimental Investigations ◽  
Loading Frequency ◽  
Specific Domain ◽  
Switching Mechanism

In this work the coupled electromechanical behaviors of the overall properties of ferroelectric ceramics have been experimentally studied with different initial poling states and loading frequencies in order to have a better understanding of their domain switching mechanism. The material under investigation is soft PZT-5 ceramic, which shows noticeable nonlinear response upon externally applied load. The experimental results show that the state of initial poling in the specimens can evidently affect the characteristics of the hysteresis loops. The electrical loading frequency dependence of the ferroelectric properties of PZT-5, e.g., coercive field, remnant polarization, etc., has also been investigated through the tests conducted on the carefully designed multi-field testing system. Despite some common features of frequency dependence shared by all three types of initial poling, it is found out that the effects of loading frequency on the change of coercive field and remnant polarization for the specimen poled perpendicular to the switching axis deviate from those of the other two poling states, and this may be attributed to the specific domain switching mechanism for the perpendicularly poled specimen.

Ferroelectric properties in Mn-modified BiFeO3–BaTiO3 ceramics

2014 ◽  
Vol 07 (01) ◽  
pp. 1350074 ◽  
Author(s):  
Zhonghua Dai ◽  
Yukikuni Akishige
Keyword(s):  
Spontaneous Polarization ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Applied Field ◽  
Ferroelectric Properties ◽  
Relaxor Ferroelectrics ◽  
Annealed Sample ◽  
Dielectric Dispersion ◽  
Dc Resistivity ◽  
Ceramic Process

Multiferroic 0.4 mol%- MnO 2-doped 0.78 BiFeO 3–0.22 BaTiO 3 ceramics were prepared by a traditional ceramic process. The effects of doping and annealing on the dielectric and ferroelectric properties were intensively investigated. Dielectric dispersion like relaxor ferroelectrics was observed in the oxygen annealed sample, but disappeared in the vacuum annealed sample. Modification of the BiFeO 3– BaTiO 3 with MnO 2 and annealing in vacuum improved DC resistivity obviously. The spontaneous polarization, remnant polarization, and coercive field are 65.2 μC/cm2, 59.5 μC/cm2 and 21.9 kV/cm, respectively under an applied field of 35 kV/cm.

Microstructure and Properties of A-Site Doping Bi4-xYxTi3O12 Ferrroelectric Thin Films

2015 ◽  
Vol 815 ◽  
pp. 171-175
Author(s):  
Hong Cheng Liu ◽  
Wei Jun Zhang ◽  
Xiao Chen Zhang ◽  
Qian Yu ◽  
Jue Wang
Keyword(s):  
Thin Films ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Bismuth Titanate ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Ferroelectric Thin Films ◽  
Phase Development ◽  
Sol Gel Process ◽  
A Site

s. Yttium-substituted bismuth titanate (Bi4-xYxTi3O12, BYT) thin films were deposited on the (111)Pt/Ti/SiO2(100) substrates by a modified Sol-Gel process and studied in this work in terms ofY3+-modified microstructure and phase development as well as ferroelectric properties. With the aid of the fist-principle, the position of Y3+substitution for Bi3+on the microstructure of BYT was studied.The phase change in the formation of BYT crystalline and the effect of Y3+substitution for Bi3+on the microstructure of BYT was studiedbyXRD. The results showed that the optimal properties of the obtained BYT ferroelectric thin films werex:0.6. The ferroelectric properties of the films were also investigated. When the Y-substituted contentxwas equal to 0.6, the remnant polarization was the largest. The remnant polarization 2Prvalue was equal to 16.02μC/cm2and the coercive fieldEcvalue was 88 kV/cm.

Preparation and Ferroelectric Properties of BaTiO3 Nanotubes

2015 ◽  
Vol 655 ◽  
pp. 159-163 ◽  
Author(s):  
Ning Zhu ◽  
Li Jie Wang ◽  
Xiang Yun Deng
Keyword(s):  
Anodic Oxidation ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Oxidation Reaction ◽  
Hydrothermal Reaction ◽  
Ferroelectric Properties ◽  
Tetragonal Structure ◽  
Nanotube Arrays ◽  
Elementary Composition ◽  
Hydrothermal Temperature

BaTiO3 nanotube arrays are prepared by hydrothermal reaction using the TiO2 nantotubes prepared by anodic oxidation reaction. The element, structure, elementary composition and ferroelectric properties are researched by SEM, XRD and TF Analyzer. The result shows that the prepared BaTiO3 arranged orderly and have tetragonal structure after annealing. The diffracted intensity increased with the hydrothermal temperature rising up. With the increasing of Ba(OH)2 concentration, remnant polarization intensity and coercive field climbed up and then decreased. With the increasing of hydrothermal temperature, remnant polarization intensity and coercive field increased. When the Ba(OH)2 concentration is 0.3mol/L, the hydrothermal temperature is 260°C,the remnant polarization and coercive field of the samples reached the maximum and respectively reached 6.69mC/cm2 and 1.32 kV/cm.

Ferroelectric Properties of Pb(Zr1/2Ti1/2)O3-Pb(Zn1/3Nb2/3)O3 Ceramics under Compressive Stress Applied Perpendicular to Electric Field

2009 ◽  
Vol 421-422 ◽  
pp. 411-414 ◽  
Author(s):  
Muangjai Unruan ◽  
Thanapong Sareein ◽  
Anurak Prasatkhetragarn ◽  
Athipong Ngamjarurojana ◽  
Supon Ananta ◽  
...  
Keyword(s):  
Electric Field ◽  
Compressive Stress ◽  
Mixed Oxide ◽  
Coercive Field ◽  
Remanent Polarization ◽  
Domain Walls ◽  
Domain Switching ◽  
Ferroelectric Properties ◽  
Electric Field Direction ◽  
Ferroelectric Hysteresis

Effects of perpendicular compressive stress on the ferroelectric properties of ceramics in PZT-PZN system were investigated. The (1-x)Pb(Zr1/2Ti1/2)O3-xPb(Zn1/3Nb2/3)O3 or (1-x)PZT- (x)PZN (x = 0.1-0.5) ceramics were prepared by a conventional mixed-oxide method. The ferroelectric properties were measured under compressive stress applied perpendicular to an electric field direction at stress levels up to 90 MPa using a compressometer in conjunction with a modified Sawyer-Tower circuit. It was found that with increasing compressive stress the area of the ferroelectric hysteresis (P-E) loops, the maximum polarization (Pmax), and the remanent polarization (Pr) decreased, while the coercive field (Ec) remained relatively constant. These results were interpreted through the domain switching, clamping of domain walls and de-poling mechanisms.

Electrical Properties of Bismuth-Layered Structural CaxSr2-xBi4Ti5O18 Ceramics

2010 ◽  
Vol 105-106 ◽  
pp. 282-285 ◽  
Author(s):  
Su Hua Fan ◽  
Feng Qing Zhang ◽  
Q.D. Che ◽  
R. Yu ◽  
W. Hu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Remnant Polarization ◽  
Single Phase ◽  
Ferroelectric Properties ◽  
Secondary Phase ◽  
Ferroelectric Ceramics ◽  
Layered Perovskite

Effects of amount of Ca on crystal structure, microstructure, ferroelectric properties, and dielectric properties of the CaxSr2-xBi4Ti5O18 (CSBTi-x) ferroelectric ceramics were investigated. The results show that single-phase layered perovskite ferroelectrics were obtained and no appreciable secondary phase was found.Ca-doping results in a notable enlargement of remnant polarization 2Pr. The 2Pr of CSBT-0.15 reaches a large value, the remnant polarization 2Pr and coercive field 2Ec were 18.1µC/cm2 and 120.2kV/cm, respectively. Dielectric constant and dielectric loss of CSBT-0.15 was also measured, showing dielectric constant εr=199~194 and dielectric loss tanδ=0.02~0.014 over the range of 100 kHz~1MHz, respectively.

Piezoelectric and Ferroelectric Properties of KNN-LS-BF1-xCx Ceramics

2015 ◽  
Vol 1120-1121 ◽  
pp. 94-97
Author(s):  
Hua Wang ◽  
Xia Yan Zhao ◽  
Ji Wen Xu ◽  
Ling Yang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Coercive Field ◽  
Remnant Polarization ◽  
Perovskite Structure ◽  
Ferroelectric Properties ◽  
Solid State Reaction Method ◽  
Depolarization Temperature ◽  
Pure Perovskite Structure ◽  
Reaction Method

0.998[(0.95(K0.5Na0.5)NbO3-0.05LiSbO3]-0.002BiFe1-xCoxO3 (KNN-LS-BF1-xCx, x=0-0.8) piezoelectric ceramics were prepared by solid-state reaction method. The influences of Co content on piezoelectric and ferroelectric properties were investigated. The results reveal that the substitution of Co significantly affects the piezoelectric and ferroelectric properties of KNN-LS-BF1-xCx ceramics. All samples with various Co contents show a pure perovskite structure. With increasing x from 0 to 0.8, the depolarization temperature Td of KNN-LS-BF1-xCx ceramics increase with increasing x, and the piezoelectric constant d33of KNN-LS-BF1-xCx specimen with x=0.2 is larger than those of other KNN-LS-BF1-xCx specimens in the investigated range when the temperature is lower than Td. The remnant polarization Pr decrease with x in the investigated range, but the coercive field Ec increase to 1.78kV/mm with x up to 0.6, and then decrease with further increase of Co contents x.

Direct measurement of the domain switching contribution to the dynamic piezoelectric response in ferroelectric ceramics

2006 ◽  
Vol 89 (9) ◽  
pp. 092901 ◽  
Author(s):  
Jacob L. Jones ◽  
Mark Hoffman ◽  
John E. Daniels ◽  
Andrew J. Studer
Keyword(s):  
Direct Measurement ◽  
Domain Switching ◽  
Ferroelectric Ceramics ◽  
Piezoelectric Response

W doping-dependent structural and ferroelectric properties of SrBi2Nb2O9 ferroelectric ceramics

2007 ◽  
Vol 400 (1-2) ◽  
pp. 134-136 ◽  
Author(s):  
Jie Qiu ◽  
Guo-Zhen Liu ◽  
Meng He ◽  
Hao-Shuang Gu ◽  
Tao-Sheng Zhou
Keyword(s):  
Ferroelectric Properties ◽  
Ferroelectric Ceramics ◽  
W Doping
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