Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 11 papers published in subject: > since this site started. |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. High intrinsic dielectric properties for aluminates | |||
LIU Yaoyao,LI Qiuju | |||
Physics 27 March 2019 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The dielectric properties of LaAlO3, YAlO3, SrLaAlO4, and NdCaAlO4 single crystals were examined in the temperature range of -180-800℃ and the frequency range of 100 Hz-5 MHz. A thermally activated relaxation resulting from the hopping motions of oxygen vacancies was found in these aluminates. Impedance analysis revealed that LaAlO3, YAlO3, and NdCaAlO4 show intrinsic dielectric properties in the temperature range below 200℃. While for SrLaAlO4, whose intrinsic dielectric properties can be maintained up to a higher temperature of 400℃. The aluminates show close intrinsic dielectric constant of ~20 with low dielectric loss in their intrinsic range indicating that these materials are very encouraging for gate dielectrics. | |||
TO cite this article:LIU Yaoyao,LI Qiuju. High intrinsic dielectric properties for aluminates[OL].[27 March 2019] http://en.paper.edu.cn/en_releasepaper/content/4748042 |
2. Investigation of raw-material pre-milling effection physical properties of BaTiO3 piezoelectric ceramics | |||
SUN Dandan,ZHANG Jialiang,WU Yanqing,ZHANG Zhongqiu,LIU Dakang | |||
Physics 12 October 2016 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:This paper reports our investigation result about the pre-milling treatment effect of BaCO3 powder on physical properties of the resultant BaTiO3 ceramics prepared by conventional solid-state reaction. BaCO3 powder usually consists of large rod-shaped particles, which cannot be easily broken up into fine ones when ball-milled together with TiO2 powder. This may lead to chemical compositional non-uniformity and large particle sizes of the subsequently synthesized BaTiO3 powder, and may eventually affect microstructure and piezoelectric properties of the resultant BaTiO3 ceramics. Our study showed that an additional ball-milling treatment of BaCO3 powderbefore being mixed with TiO2 powder is an effective mean to get good-quality BaTiO3 fine powder. In such a way, we fabricated a series of small-grained dense BaTiO3 ceramics with significantly high piezoelectric coefficient d33. A much enhanced d33 value of 470 pC/N was achieved in comparison to the previous maximum one of 410 pC/N for those BaTiO3 ceramics formed through ordinary ceramic procedure. | |||
TO cite this article:SUN Dandan,ZHANG Jialiang,WU Yanqing, et al. Investigation of raw-material pre-milling effection physical properties of BaTiO3 piezoelectric ceramics[OL].[12 October 2016] http://en.paper.edu.cn/en_releasepaper/content/4706769 |
3. High sensitive microfluidic flow sensor based on aligned piezoelectric nanofibers | |||
ZHANG Lingling,YU Xiaolei,YOU Sujian,LIU Huiqin,ZHANG Cancan,CAI Bo,XIAO Liang,LIU Wei,GUO Shishang,ZHAO Xingzhong | |||
Physics 19 October 2015 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:A microfluidic flow sensor based on aligned polyvinylidene fluoride trifluoroethylene P(VDF-TrFE) piezoelectric nanofibers has been developed, which can be used for real-time detection of low flow rate and viscosity in microchannels. The detection principle dependence of voltage drop output by nanofibers while sensing pressure drop along the microchannel. Due to the high sensitivity of nanofibers, this sensor responded linearly to low flow rates ranging from 13 µl/h to 451 µl/h, and viscosities of ethylene glycol aqueous solution ranging from 1 mPa•S to 16.1 mPa•S at 25℃, respectively. These findings highlight the potential of P(VDF-TrFE) nanofibers in multifunctional sensors. | |||
TO cite this article:ZHANG Lingling,YU Xiaolei,YOU Sujian, et al. High sensitive microfluidic flow sensor based on aligned piezoelectric nanofibers[OL].[19 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4658132 |
4. Enhanced dielectric and magnetic properties in Ru and La co-doped BiFeO3 ceramics | |||
LIU Weifang,GONG Yufei | |||
Physics 18 November 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Multiferroic ceramics Bi0.9La0.1Fe1-xRuxO3 (x = 0%, 1% and 3%) were prepared using a solid-state reaction process. The structural transformation from rhombohedral to pseudocubic was confirmed in the Ru-doped samples via x-ray diffraction investigation, and the improved dielectric properties are ascribed to the morphotropic phase boundary and decreased oxygen defects existing in the Ru-substituted samples. The enhancement of magnetization is interpreted by the increased Fe3+ ions and the formation of a local 'ferrimagnetic' structure in the Ru-doped samples. | |||
TO cite this article:LIU Weifang,GONG Yufei. Enhanced dielectric and magnetic properties in Ru and La co-doped BiFeO3 ceramics[OL].[18 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4494763 |
5. Notable Influence of Orthorhombic-Tetragonal Phase Transition on Microwave Dielectric Dispersion in BaTiO3 Ceramic | |||
ZHANG Jialiang,HAO Wentao,ZHENG Peng,TAN Yongqiang,JI Pengfei,WANG Chunlei | |||
Physics 16 November 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Temperature-stable, frequency-independent and low-loss dielectric properties are usually essential for a high-permittivity ferroelectric material to be practically applied in microwave devices. BaTiO3 ceramics are a type of important ferroelectric material in the viewpoints of both fundamental studies and technological applications. However, investigations of the microwave dielectric dispersion below room temperature have been rarely carried out so far. In this study, the temperature evolution of dielectric dispersion was examined for a coarse-grained BaTiO3 ceramic in the frequency range from 40 Hz to 1 GHz and over the temperature interval between -50 and 180 C, which thus includes the orthorhombic-tetragonal polymorphic phase transition and covers the large part of common usage temperature region. An important physical phenomenon that the phase transition has a notable influence on the microwave dielectric dispersion has been clearly disclosed. The dielectric permittivity ε' shows a maximum whereas the characteristic frequency fr exhibits a minimum in the vicinity of orthorhombic-tetragonal phase transition temperature. In addition, large difference in fr is observed between the heating process and the cooling process in the tetragonal phase. It is considered that the experimentally found phenomenon can be explained by the previously suggested mechanism of the emission of elastic shear waves from ferroelastic domain walls. | |||
TO cite this article:ZHANG Jialiang,HAO Wentao,ZHENG Peng, et al. Notable Influence of Orthorhombic-Tetragonal Phase Transition on Microwave Dielectric Dispersion in BaTiO3 Ceramic[OL].[16 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4496187 |
6. High temperature electromechanical properties of calcium bismuth niobate (CaBi2Nb2O9) piezoelectric ceramics | |||
WANG Chunming,GUO Zhen-Lei,ZHAO Tian-Long,YU Si-Long | |||
Physics 31 January 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The dielectric, piezoelectric and electromechanical properties of (LiCe) modified CaBi2Nb2O9 (CBN) bismuth layer-structured ferroelectric ceramics were investigated. The piezoelectric activity and electromechanical properties of CBN ceramics were significantly improved by (LiCe) modification. The piezoelectric coefficient d33, Curie temperature Tc, electromechanical coupling factors (kp and kt), and mechanical quality factors (Qmp and Qmt), for the CBN ceramics modified with 0.10 mol% (LiCe) were found to be 16 pC/N, 921 oC, 10.4%, 29.6%, 14400 and 5700 respectively. The excellent dielectric and electromechanical spectra, together with its high piezoelectric activities and high Curie temperature (>900 oC), demonstrated the potential of (LiCe) modified CBN ceramics for ultrahigh temperature sensing applications. | |||
TO cite this article:WANG Chunming,GUO Zhen-Lei,ZHAO Tian-Long, et al. High temperature electromechanical properties of calcium bismuth niobate (CaBi2Nb2O9) piezoelectric ceramics[OL].[31 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4464603 |
7. The study of domain reversal in the near-stoichiometric ZrO2-doped lithium niobate crystals | |||
Liang Qirui,Zhang Rong,Zhu Meiling,Liu Hongde | |||
Physics 29 January 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Domain reversal of near-stoichiometric ZrO2-doped lithium niobate crystals was investigated. In the experiment, we observed the quadrangle domains with smaller size. The merging process of the neighboring domain walls stayed still for several minutes in the low electric field. The switching electric field for the backward domain reversal changed with the change of the forward electric field. However, these differences were diminished with the decreasing concentration of zirconium ions. The coercive field for the forward domain reversal is 900 V/mm in 0.5mol% ZrO2 doped near-stoichiometric lithium niobate crystals. With the low coercive field, near stoichiometric ZrO2-doped lithium niobate crystals would be a promising material for periodically poled lithium niobate with larger size. | |||
TO cite this article:Liang Qirui,Zhang Rong,Zhu Meiling, et al. The study of domain reversal in the near-stoichiometric ZrO2-doped lithium niobate crystals[OL].[29 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4464168 |
8. Electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitors | |||
Zhang Jihao,Zhu Guodong | |||
Physics 18 January 2012 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In recent years ferroelectric polymer-based nonvolatile memory devices have attracted much attention due to their flexibility, transparency and ease of production. However, their electrical stability is seldom studied. Here we report the observation of electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitor memories, which is compared with the electric fatigue obtained from metal/ferroelectric polymer/p-Si capacitors. Our experiments indicate that the existence of SiO2 layer has greatly improved the fatigue endurance in metal/ferroelectric polymer/SiO2/p-Si capacitors. We also discuss the possible mechanism causing this improved fatigue endurance. | |||
TO cite this article:Zhang Jihao,Zhu Guodong. Electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitors[OL].[18 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4462915 |
9. Structure and Electrical Properties of Nd/Ni-Codoped Bismuth Titanate Thin Films Prepared by Chemical Solution Deposition Method | |||
Liu Weifang ,Jiang Peng,Bao Dinghua | |||
Physics 29 January 2010 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:(Bi3.15Nd0.85)(NixTi1-x)3O12 (BNNT) thin films were prepared on Pt/TiO2/SiO2/Si substrates by chemical solution deposition. The effect of Ni-doping amount on the structure and electrical properties of Bi3.15Nd0.85Ti3O12 thin films was investigated. The structure properties of the films were determined by X-ray diffraction, which indicated that the Ni/Nd-cosubstitution did not destroy the bismuth-layered perovskite structure of Bi4Ti3O12. The dielectric behavior was measured under the frequency from 100 Hz to 100 kHz at room temperature, which indicated that Ni-doping can increase the dielectric constant of BNdT films. For x=0.10 the dielectric constants is 297 at the frequency of 1 kHz. Meanwhile, well saturated hysteresis loops were observed in the BNNT thin films. The remanent polarization (2Pr) and coercive field (2Ec) of our BNdT films are 34.8 μC/cm2 and 250 kV/cm, respectively. With x increasing, both 2Pr and 2Ec of BNNT films decreased. For x=0.10, the 2Pr and 2Ec are 17.7 μC/cm2 and 175 kV/cm, respectively. | |||
TO cite this article:Liu Weifang ,Jiang Peng,Bao Dinghua . Structure and Electrical Properties of Nd/Ni-Codoped Bismuth Titanate Thin Films Prepared by Chemical Solution Deposition Method[OL].[29 January 2010] http://en.paper.edu.cn/en_releasepaper/content/39686 |
10. Ferroelectric and Optical Absorption Properties of Au-dispersed (Bi,Nd)4Ti3O12 Thin Films Derived by Sol-gel Method | |||
Peng Jiang,Ruan Kaibin,Liu Weifang,Dinghua Bao | |||
Physics 27 January 2010 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Au-dispersed (Bi,Nd)4Ti3O12 thin films were prepared on fused silica and Pt-coated silicon substrates by sol-gel method, and the microstructure, ferroelectric and optical absorption properties of the thin films were studied. The thin films crystallized in layered perovskite phase, with smooth and dense surface. Au existed in the thin films as metal phase. A well-defined polarization-electric field hysteresis loop was measured for the thin films with 1.6% molar ratio of dispersed Au, and an obvious absorption peak at about 630 nm due to surface plasmon resonance of Au nanoparticles was observed in optical absorption spectra. The Au-dispersed (Bi,Nd)4Ti3O12 thin films might find applications in ferroelectric-based optoelectronic devices. | |||
TO cite this article:Peng Jiang,Ruan Kaibin,Liu Weifang, et al. Ferroelectric and Optical Absorption Properties of Au-dispersed (Bi,Nd)4Ti3O12 Thin Films Derived by Sol-gel Method[OL].[27 January 2010] http://en.paper.edu.cn/en_releasepaper/content/39532 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated