Journals >Journal of Advanced Dielectrics
Contents
2024
Volume: 14 Issue 1
8 Article(s)
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Research Articles
Energy storage optimization of ferroelectric ceramics during phase-transition process of amorphous/nanocrystalline and polycrystalline by using a phase-field model for dielectric breakdown
Suilong Huang, Jianwen Chen, Zhen Su, Xiucai Wang, Wenbo Zhu, Wenjun Chen, Xinmei Yu, and Peng Xiao
Ferroelectric ceramics have the potential to be widely applied in the modern industry and military power systems due to their ultrafast charging/discharging speed and high energy density. Considering the structural design and electrical properties of ferroelectric capacitor, it is still a challenge to find out the optiFerroelectric ceramics have the potential to be widely applied in the modern industry and military power systems due to their ultrafast charging/discharging speed and high energy density. Considering the structural design and electrical properties of ferroelectric capacitor, it is still a challenge to find out the optimal energy storage of ferroelectric ceramics during the phase-transition process of amorphous/nanocrystalline and polycrystalline. In this work, a finite element model suitable for the multiphase ceramic system is constructed based on the phase field breakdown theory. The nonlinear coupling relationship of multiple physical fields between multiphase ceramics was taken into account in this model. The basic structures of multiphase ceramics are generated by using the Voronoi diagram construction method. The specified structure of multiphase ceramics in the phase-transition process of amorphous/nanocrystalline and polycrystalline was further obtained through the grain boundary diffusion equation. The simulation results show that the multiphase ceramics have an optimal energy storage in the process of amorphous polycrystalline transformation, and the energy storage density reaches the maximum when the crystallinity is 13.96% and the volume fraction of grain is 2.08%. It provides a research plan and idea for revealing the correlation between microstructure and breakdown characteristics of multiphase ceramics. This simulation model realizes the nonlinear coupling of the multiphase ceramic mesoscopic structure and the phase field breakdown. It provides a reference scheme for the structural design and performance optimization of ferroelectric ceramics..
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2245001 (2024)
Investigation of electrophysical, photo- and gas-sensitive properties of ZnO–SnO2 sol–gel films
Irina A. Gulyaeva, Alexandra P. Ivanisheva, Maria G. Volkova, Victoria Yu. Storozhenko, Soslan A. Khubezhov, Ekaterina M. Bayan, and Victor V. Petrov
Thin nanocomposite films based on tin dioxide with a low content of zinc oxide (0.5–5mol.%) were obtained by the sol–gel method. The synthesized films are 300–600nm thick and contains pore sizes of 19–29nm. The resulting ZnO–SnO2 films were comprehensively studied by atomic force and Kelvin probe force microscopy, X-raThin nanocomposite films based on tin dioxide with a low content of zinc oxide (0.5–5
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2245002 (2024)
Flexoelectricity in oxide thin films
Guoyang Shen, Renhong Liang, Zhiguo Wang, Zhiyong Liu, and Longlong Shu
Flexoelectric effect describes the electromechanical coupling between the strain gradient and its internal polarization in all dielectrics. Despite this universality, the resulting flexoelectric field remains small at the macroscopic level. However, in nanosystems, the size-dependent effect of flexoelectricity becomes Flexoelectric effect describes the electromechanical coupling between the strain gradient and its internal polarization in all dielectrics. Despite this universality, the resulting flexoelectric field remains small at the macroscopic level. However, in nanosystems, the size-dependent effect of flexoelectricity becomes increasingly significant, leading to a notable flexoelectric field that can strongly influence the material’s physical properties. This review aims to explore the flexoelectric effect specifically at the nanoscale. We achieve this by examining strain gradients generated through two distinct methods: internal inhomogeneous strain and external stimulation. In addition, advanced synthesis techniques are utilized to enhance the properties and functionalities associated with flexoelectricity. Furthermore, we delve into other coupled phenomena observed in thin films, including the coupling and utilization of flexomagnetic and flexophotovoltaic effects. This review presents the latest advancements in these areas and highlights their role in driving further breakthroughs in the field of flexoelectricity..
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2330001 (2024)
Preparation and acoustic properties of high-temperature acoustic emission sensor based on La3Ga5SiO
Jingxiang Si, Changhong Yang, Rui Guo, Yifan Wu, Xiujuan Lin, and Shifeng Huang
With the rapid development of modern industries, the high-temperature piezoelectric sensors that can work in extreme environments are in great demand. In this work, langasite (La3Ga5SiO14, LGS), as a high-temperature piezoelectric crystal with stable electro-elastic performance, is used as core element, and air and porWith the rapid development of modern industries, the high-temperature piezoelectric sensors that can work in extreme environments are in great demand. In this work, langasite (La3Ga5SiO
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2342001 (2024)
Optimization design of autofocusing metasurface for ultrasound wave application
Zhaoxi Li, Shenghui Yang, Mengqing Zhou, Chenxue Hou, Dongdong Chen, Chunlong Fei, Di Li, Yi Quan, and Yintang Yang
In this paper, two optimized autofocusing metasurfaces (AFMs) with different desired focal distances are designed by using particle swarm optimization (PSO) algorithm. Based on the finite element simulation software COMSOL Multiphysics, the performance of ultrasound transducer (UT) with AFM at different design parameteIn this paper, two optimized autofocusing metasurfaces (AFMs) with different desired focal distances are designed by using particle swarm optimization (PSO) algorithm. Based on the finite element simulation software COMSOL Multiphysics, the performance of ultrasound transducer (UT) with AFM at different design parameters in Airy distributions
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2350001 (2024)
Dielectric spectroscopy characterization of Na
Georgi B. Hadjichristov, Daniela G. Kovacheva, Yordan G. Marinov, Daniela B. Karashanova, Todor E. Vlakhov, and Nicola Scaramuzza
We studied the effect of titanium dioxide (TiO2) nanoparticles (NPs) on dielectric behavior of Na+ ion-conducting salt-complexed polymer nanocomposite system formed from a binary polymer blend of poly(ethylene oxide) (PEO) and polyvinyl pyrrolidone (PVP), with the addition of both sodium metaperiodate (NaIO4) at concenWe studied the effect of titanium dioxide (TiO2) nanoparticles (NPs) on dielectric behavior of Na
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2350021 (2024)
Substitution of Pb with (Li
Binzhi Liu, Anand P. S. Gaur, Jun Cui, and Xiaoli Tan
PbZrO3-based antiferroelectric (AFE) ceramics are promising dielectrics for high-energy-density capacitors due to their reversible phase transitions during charge–discharge cycles. In this work, a new composition series, [Pb0.93−xLa0.02(Li1∕2Bi1∕2)xSr0.04][Zr0.57Sn0.34Ti0.09]O3, with Li+ and Bi3+ substitution of Pb2+ aPbZrO3-based antiferroelectric (AFE) ceramics are promising dielectrics for high-energy-density capacitors due to their reversible phase transitions during charge–discharge cycles. In this work, a new composition series, [Pb
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2350022 (2024)
Structure and dielectric properties of (1-x)Na
E. V. Glazunova, L. A. Shilkina, A. S. Chekhova, A. V. Nazarenko, I. A. Verbenko, and L. A. Reznichenko
The solid solutions of the (1-x)Na0.5Bi0.5TiO3-xNa0.5K0.5NbO3 system were produced by the conventional ceramic technology using mechanical activation of the synthesized product. It was found that in the (1-x)Na0.5Bi0.5TiO3-xNa0.5K0.5NbO3 system at room temperature, a number of morphotropic phase transitions occur: rhomThe solid solutions of the (1-x)Na
Journal of Advanced Dielectrics
- Publication Date: Jan. 01, 1900
- Vol. 14, Issue 1, 2350023 (2024)
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