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Yusheng Liu - One of the best experts on this subject based on the ideXlab platform.
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Mechanical induced electrical failure of shock compressed PZT95/5 Ferroelectric Ceramics
Current Applied Physics, 2017Co-Authors: Hengchang Nie, Jia Yang, Xuefeng Chen, Fuping Zhang, Genshui Wang, Yusheng Liu, Xianlin DongAbstract:Abstract A comparative experimental study of shock compressed Pb 0.99 (Zr 0.95 Ti 0.05 ) 0.98 Nb 0.02 O 3 (hereafter referred to as PZT95/5) Ferroelectric Ceramics within different insulation materials were performed in this study. It was found that the insulating materials play a significant role in the electrical failure behavior of PZT95/5 Ferroelectric ceramic. The electrical breakdown behavior of PZT95/5 Ferroelectric Ceramics within epoxy resin was observed to aggravate at low temperature −55 °C. Porous PZT95/5 Ferroelectric ceramic was found to exhibit lower failure probability than its dense counterpart. Electrical failure of PZT95/5 Ferroelectric Ceramics under shock wave was found to be an extrinsic behavior and a tentative explanation was proposed based on the mechanical compressive stress-induced cracks initiation by epoxy resin.
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Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics: Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics
Journal of Inorganic Materials, 2013Co-Authors: Chunfeng Lan, Hengchang Nie, Genshui Wang, Chen Xuefeng, Junxia Wang, Dong Xianlin, Yusheng LiuAbstract:Dense PZT 95/5 Ferroelectric Ceramics were fabricated by solid-state reaction method. Low-temperature phase structures and electrical properties of dense PZT 95/5 Ferroelectric Ceramics were investigated. X-ray diffraction (XRD) results show that the phases of both poled and unpoled dense PZT 95/5 Ferroelectric Ceramics almost keep unchanged at different temperature. The remanent polarization calculated from the pyroelectric current and the resistance of dense PZT 95/5 Ferroelectric Ceramics changes little at low temperature (–60¡䧮 However, when the temperatue is reduced from 30¡䟴o –60¡䪠the relative dielectric constant dramatically decreases from 278 to 173. According to the dynamic discharge model analysis, the sharp decrease of dielectric constant results in the remarkable increase of dynamic electric field at –60¡䟷hich is 1.5 times higher than that at room temperature. This could be the dominant reason for the high dielectric breakdown probability of dense PZT 95/5 Ceramics at low temperature under shock wave loading
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Quantitative dependence of the properties of Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics on porosity
Materials Research Bulletin, 2010Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract Porous Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics with a pore size of the order of the crystalline grain size were prepared and the microstructure and the properties were investigated. Based on this microstructure, the net porosity of the Ceramics can be attributed to the intentionally introduced extrinsic porosity and thus the quantitative dependence of Ferroelectric and dielectric properties of the Ceramics on the porosity can be established respectively. A good agreement with experimental measurements was obtained. Our work represents the first attempt to tailor the properties of Ferroelectric Ceramics via varying the porosity from the viewpoint of application.
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Effect of external fields on the switching current in PZT Ferroelectric Ceramics
Solid State Communications, 2009Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract The dependence of a switching current in lead zirconate titanate (PZT) Ferroelectric Ceramics on the temperature and an applied electrical field was investigated. It was found that temperature has a moderate contribution to the switching current values, but applied electric fields have significant effects on the values. Importantly, a relaxation of switching current on frequency was observed through this method. By a comparison investigation on PZT Ceramics of different compositions non- 18 0 ∘ domain switching was found to be responsible for the relaxation. A function, the ‘active potential of domains’ was proposed to interpret the observed results from the viewpoint of energy. The results obtained provide a new understanding of domain process in Ferroelectric Ceramics that relaxation of domains is a collective motion of non- 18 0 ∘ domains.
Hengchang Nie - One of the best experts on this subject based on the ideXlab platform.
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Mechanical induced electrical failure of shock compressed PZT95/5 Ferroelectric Ceramics
Current Applied Physics, 2017Co-Authors: Hengchang Nie, Jia Yang, Xuefeng Chen, Fuping Zhang, Genshui Wang, Yusheng Liu, Xianlin DongAbstract:Abstract A comparative experimental study of shock compressed Pb 0.99 (Zr 0.95 Ti 0.05 ) 0.98 Nb 0.02 O 3 (hereafter referred to as PZT95/5) Ferroelectric Ceramics within different insulation materials were performed in this study. It was found that the insulating materials play a significant role in the electrical failure behavior of PZT95/5 Ferroelectric ceramic. The electrical breakdown behavior of PZT95/5 Ferroelectric Ceramics within epoxy resin was observed to aggravate at low temperature −55 °C. Porous PZT95/5 Ferroelectric ceramic was found to exhibit lower failure probability than its dense counterpart. Electrical failure of PZT95/5 Ferroelectric Ceramics under shock wave was found to be an extrinsic behavior and a tentative explanation was proposed based on the mechanical compressive stress-induced cracks initiation by epoxy resin.
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Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics: Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics
Journal of Inorganic Materials, 2013Co-Authors: Chunfeng Lan, Hengchang Nie, Genshui Wang, Chen Xuefeng, Junxia Wang, Dong Xianlin, Yusheng LiuAbstract:Dense PZT 95/5 Ferroelectric Ceramics were fabricated by solid-state reaction method. Low-temperature phase structures and electrical properties of dense PZT 95/5 Ferroelectric Ceramics were investigated. X-ray diffraction (XRD) results show that the phases of both poled and unpoled dense PZT 95/5 Ferroelectric Ceramics almost keep unchanged at different temperature. The remanent polarization calculated from the pyroelectric current and the resistance of dense PZT 95/5 Ferroelectric Ceramics changes little at low temperature (–60¡䧮 However, when the temperatue is reduced from 30¡䟴o –60¡䪠the relative dielectric constant dramatically decreases from 278 to 173. According to the dynamic discharge model analysis, the sharp decrease of dielectric constant results in the remarkable increase of dynamic electric field at –60¡䟷hich is 1.5 times higher than that at room temperature. This could be the dominant reason for the high dielectric breakdown probability of dense PZT 95/5 Ceramics at low temperature under shock wave loading
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Quantitative dependence of the properties of Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics on porosity
Materials Research Bulletin, 2010Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract Porous Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics with a pore size of the order of the crystalline grain size were prepared and the microstructure and the properties were investigated. Based on this microstructure, the net porosity of the Ceramics can be attributed to the intentionally introduced extrinsic porosity and thus the quantitative dependence of Ferroelectric and dielectric properties of the Ceramics on the porosity can be established respectively. A good agreement with experimental measurements was obtained. Our work represents the first attempt to tailor the properties of Ferroelectric Ceramics via varying the porosity from the viewpoint of application.
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Effect of external fields on the switching current in PZT Ferroelectric Ceramics
Solid State Communications, 2009Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract The dependence of a switching current in lead zirconate titanate (PZT) Ferroelectric Ceramics on the temperature and an applied electrical field was investigated. It was found that temperature has a moderate contribution to the switching current values, but applied electric fields have significant effects on the values. Importantly, a relaxation of switching current on frequency was observed through this method. By a comparison investigation on PZT Ceramics of different compositions non- 18 0 ∘ domain switching was found to be responsible for the relaxation. A function, the ‘active potential of domains’ was proposed to interpret the observed results from the viewpoint of energy. The results obtained provide a new understanding of domain process in Ferroelectric Ceramics that relaxation of domains is a collective motion of non- 18 0 ∘ domains.
Genshui Wang - One of the best experts on this subject based on the ideXlab platform.
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Mechanical induced electrical failure of shock compressed PZT95/5 Ferroelectric Ceramics
Current Applied Physics, 2017Co-Authors: Hengchang Nie, Jia Yang, Xuefeng Chen, Fuping Zhang, Genshui Wang, Yusheng Liu, Xianlin DongAbstract:Abstract A comparative experimental study of shock compressed Pb 0.99 (Zr 0.95 Ti 0.05 ) 0.98 Nb 0.02 O 3 (hereafter referred to as PZT95/5) Ferroelectric Ceramics within different insulation materials were performed in this study. It was found that the insulating materials play a significant role in the electrical failure behavior of PZT95/5 Ferroelectric ceramic. The electrical breakdown behavior of PZT95/5 Ferroelectric Ceramics within epoxy resin was observed to aggravate at low temperature −55 °C. Porous PZT95/5 Ferroelectric ceramic was found to exhibit lower failure probability than its dense counterpart. Electrical failure of PZT95/5 Ferroelectric Ceramics under shock wave was found to be an extrinsic behavior and a tentative explanation was proposed based on the mechanical compressive stress-induced cracks initiation by epoxy resin.
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Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics: Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics
Journal of Inorganic Materials, 2013Co-Authors: Chunfeng Lan, Hengchang Nie, Genshui Wang, Chen Xuefeng, Junxia Wang, Dong Xianlin, Yusheng LiuAbstract:Dense PZT 95/5 Ferroelectric Ceramics were fabricated by solid-state reaction method. Low-temperature phase structures and electrical properties of dense PZT 95/5 Ferroelectric Ceramics were investigated. X-ray diffraction (XRD) results show that the phases of both poled and unpoled dense PZT 95/5 Ferroelectric Ceramics almost keep unchanged at different temperature. The remanent polarization calculated from the pyroelectric current and the resistance of dense PZT 95/5 Ferroelectric Ceramics changes little at low temperature (–60¡䧮 However, when the temperatue is reduced from 30¡䟴o –60¡䪠the relative dielectric constant dramatically decreases from 278 to 173. According to the dynamic discharge model analysis, the sharp decrease of dielectric constant results in the remarkable increase of dynamic electric field at –60¡䟷hich is 1.5 times higher than that at room temperature. This could be the dominant reason for the high dielectric breakdown probability of dense PZT 95/5 Ceramics at low temperature under shock wave loading
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Quantitative dependence of the properties of Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics on porosity
Materials Research Bulletin, 2010Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract Porous Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 Ferroelectric Ceramics with a pore size of the order of the crystalline grain size were prepared and the microstructure and the properties were investigated. Based on this microstructure, the net porosity of the Ceramics can be attributed to the intentionally introduced extrinsic porosity and thus the quantitative dependence of Ferroelectric and dielectric properties of the Ceramics on the porosity can be established respectively. A good agreement with experimental measurements was obtained. Our work represents the first attempt to tailor the properties of Ferroelectric Ceramics via varying the porosity from the viewpoint of application.
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Effect of external fields on the switching current in PZT Ferroelectric Ceramics
Solid State Communications, 2009Co-Authors: Hengchang Nie, Genshui Wang, Xianlin Dong, Ning Bo Feng, X. F. Chen, Yusheng LiuAbstract:Abstract The dependence of a switching current in lead zirconate titanate (PZT) Ferroelectric Ceramics on the temperature and an applied electrical field was investigated. It was found that temperature has a moderate contribution to the switching current values, but applied electric fields have significant effects on the values. Importantly, a relaxation of switching current on frequency was observed through this method. By a comparison investigation on PZT Ceramics of different compositions non- 18 0 ∘ domain switching was found to be responsible for the relaxation. A function, the ‘active potential of domains’ was proposed to interpret the observed results from the viewpoint of energy. The results obtained provide a new understanding of domain process in Ferroelectric Ceramics that relaxation of domains is a collective motion of non- 18 0 ∘ domains.
L.j. Qiao - One of the best experts on this subject based on the ideXlab platform.
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Study of delayed fracture of PZT-5 Ferroelectric Ceramics
Environment-Induced Cracking of Materials, 2008Co-Authors: Kewei Gao, L.j. Qiao, Y.l. Wang, Wuyang ChuAbstract:Publisher Summary This chapter investigates the delayed fracture of lead-zirconate-titanate (PZT-5) Ferroelectric Ceramics under an applied constant load in a solution or during dynamic hydrogen charging. It also examines the effect of an applied sustained electric field on stress corrosion cracking (SCC) of PZT-5 Ferroelectric Ceramics. The fracture surfaces of specimens are examined with scanning electron microscopy. During dynamic hydrogen charging under an applied constant load, hydrogen can delay fracture of PZT-5 Ferroelectric Ceramics. The threshold stress intensity factor decreases linearly with the logarithm of hydrogen concentration C0. The threshold stress intensity factor of hydrogen-induced cracking (HIC) reveals anisotropy for the specimens with different poling directions. The normalized threshold stress intensity factor of HIC does not reveal anisotropy. SCC of PZT-5 Ferroelectric Ceramics occurs in water, silicone oil, formamide, and humid air. It also exhibits anisotropy in the threshold stress intensity factor of SCC. Positive and negative electric fields have identical effects on apparent fracture toughness, and both decrease the apparent threshold stress intensity factor of SCC in silicone oil.
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Hydrogen-Induced Semiconductor Transformation of Lead Zirconate Titanate Ferroelectric Ceramics
Journal of the American Ceramic Society, 2007Co-Authors: H. Y. Huang, Wuyang Chu, Kewei Gao, L.j. QiaoAbstract:Semiconductor transformation of lead zirconate titanate (PZT)-5H Ferroelectric Ceramics induced by hydrogen has been investigated. The results showed that hydrogen caused the PZT-5H Ferroelectric Ceramics to transform from a yellow insulator into a black n-type semiconductor, and the leakage current and carrier concentration increased but the resistivity decreased with increasing hydrogen concentration. During charging in H2 at a temperature higher than the Curie point, hydrogen would restrain the PZT-5H Ferroelectric Ceramics to transform from cubic into tetragonal phase, resulting in the disappearance of Ferroelectricity at room temperature. Charging at a temperature below the Curie point, however, did not change the crystal structure of the tetragonal Ferroelectric Ceramics. The properties and color of PZT-5H Ferroelectric Ceramics were restored after outgassing at a high temperature.
Biao Wang - One of the best experts on this subject based on the ideXlab platform.
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A statistical model prediction of effective electroelastic properties of polycrystalline Ferroelectric Ceramics with randomly oriented defects
Mechanics of Materials, 2002Co-Authors: J. Cheng, Biao WangAbstract:Abstract In terms of the microstructure characteristics of polycrystalline Ferroelectric Ceramics, a statistical micromechanics model is employed to predict the effective electroelastic properties of polycrystalline Ferroelectric Ceramics with randomly oriented defects, such as voids and microcracks, by the method of Eshelby’s equivalent inclusion theory and Mori–Tanaka’s mean field concept. The model incorporates the effects of crystallographic domain switching under external mechanical or electric field and the randomly oriented defects on the macroscopic behaviors of the polycrystalline Ferroelectric Ceramics. The analytical predictions of BaTiO 3 polycrystalline Ceramics are shown that the defects can enhance the effective piezoelectric properties but reduce the elastic properties, which are consistent with the experimental results.
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A statistical model for predicting effective electroelastic properties of polycrystalline Ferroelectric Ceramics with aligned defects
International Journal of Solids and Structures, 2000Co-Authors: J. Cheng, Biao WangAbstract:Abstract This work is focused on the analysis of the effects of domain switching and defects on the effective electroelastic properties of polycrystalline Ferroelectric Ceramics. On the basis of experimental results and the classical nucleation theory, a statistical micromechanics model is developed in order to describe the microstructural evolution of polycrystalline Ferroelectric Ceramics. Further, the methods of Eshelby’s equivalent inclusion and Mori–Tanaka’s mean field theory are used to predict the effective electroelastic properties of polycrystalline Ferroelectric Ceramics with aligned defects, taking the effects of the shapes of individual crystal and defect into consideration. Some numerical results for BaTiO3 polycrystalline Ceramics with aligned defects are carried out in order to illustrate the effects of the domain switching and defects on the effective electroelastic properties of polycrystalline Ferroelectric Ceramics. It has been shown that the simulations are in good agreement with the experimental results.