Article
Chemistry, Physical
Boying Wang, Hao Wang, Jiantao Wang, Chaolong Li, Feng Wang, Chunli Diao, Haiwu Zheng
Summary: In this study, lead-free 0.8STO-0.2BFO thin films with coexisting amorphous and nanocrystalline structure were prepared by a sol-gel method. By adjusting the heat-treatment temperature to form polar-nano regions, the energy storage density of the films was increased. The optimized 0.8STO-0.2BFO film exhibited excellent energy storage properties with high discharge energy storage density, temperature and frequency stability, as well as fatigue endurance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Tao Cui, Annan Yu, Yangyu Zhang, Jian Guo, Xiongjie Li, Shun Guo, Ji Zhang, Jing Wang, Shan-Tao Zhang
Summary: Dielectric capacitors, particularly lead-free ceramics, have great potential in high power and pulsed power electronic devices. However, the relatively small recoverable energy storage density is a challenge. This study successfully improved the relaxor behavior and breakdown strength of a specific ceramic composition, resulting in superior comprehensive energy storage performance and reliability, making it a prospective alternative for electrostatic energy storage.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Yuping Ren, Hongbo Liu, Fangchao Liu, Gang Liu
Summary: Three incorporation manners of Mn, namely as an additive, substituting Fe site, and substituting Ti site, were investigated in Mn-doped 0.5BiFeO(3)-0.5SrTiO(3) ceramics. It was found that the incorporation manner significantly influenced the dielectric, ferroelectric, and magnetic properties, with Mn doping at Fe site enhancing magnetization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jinbo Zhang, Yongping Pu, Yuxin Hao, Lei Zhang, Bo Wang, Yating Ning, Min Chen
Summary: By adding NaNbO3, the energy storage performance of lead-free ceramics was optimized, including the emergence of polar nano-regions, a decrease in the content of ferroelectric phase, an improvement in the breakdown strength, an increase in the energy gap, and a refinement of the grain size. Through domain engineering and antiferroelectric-like design, the energy storage performance was further optimized.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Wei Wang, Ke Meng, Peng-Zu Ge, Xin-Gui Tang, Qiu-Xiang Liu, Yan-Ping Jiang
Summary: Incorporating polymorphic ferroelectric nanodomains into a paraelectric matrix can enhance energy storage density in relaxor ferroelectric systems. The addition of SrTiO3 to a binary BiFeO3-BaTiO3 system suppresses P-E loops and improves recoverable energy and energy storage efficiency. The system of 0.20BiFeO(3)-(0.80 - x)BaTiO3-xSrTiO(3) shows promising potential for dielectric energy storage applications, with high energy storage efficiency observed at x = 0.55.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Bingjie Zhong, Chengyang Zuo, Chao Yang, Shilin Yang, Yun Li, Hongtao Yu, Xianhua Wei
Summary: Rare-earth ion Eu3+ was doped into SrTiO3 ceramic to enhance its dielectric energy storage properties and act as luminescence centres. The doped ceramic exhibited higher breakdown strength and recoverable energy density compared to the undoped sample, with improvements of about 22% and 58%, respectively. In addition, the europium-doped ceramic capacitor demonstrated excellent power density and characteristic red photoluminescence.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Chenghao Zhu, Wenbo Ye, Peng Zheng, Hongfei Zhang, Fuan Lu, Qiaolan Fan, Jingji Zhang, Liang Zheng, Yang Zhang, Wangfeng Bai
Summary: By introducing SBT additive, a high-performance BF-ST-xSBT ceramic system was successfully designed and prepared, showing excellent energy storage performance, good stability, and fatigue endurance, making it a promising candidate for energy storage applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Fei Yan, Hairui Bai, Guanglong Ge, Jinfeng Lin, Cheng Shi, Kun Zhu, Bo Shen, Jiwei Zhai, Shujun Zhang
Summary: Lead-free ceramics composed of BiFeO3-SrTiO3 with low hysteresis and high polarization are fabricated to achieve ultrahigh energy density and efficiency, along with excellent stability.
Article
Chemistry, Physical
S. Y. Chen, R. Liu, Y. P. Zheng, Y. J. Shi, S. T. Dang, Y. C. Shi, F. Yang, J. H. Li, L. F. He, S. J. Wu, X. F. Li, Y. C. Hu, J. Shang, S. Q. Yin, X. W. Wang
Summary: The structure and electrical properties of Ba0.85Ca0.15Zr0.1Ti0.9O3-xBiFeO3 ceramics were investigated. The samples showed perovskite structure with no detected second phase. The grain size of BiFeO3-doped ceramic samples was significantly reduced. The doped samples exhibited relaxation characteristics, with obvious dispersion phase transition and frequency dispersion. The study found that the sample with 8% doping had the best energy storage characteristics, with an energy storage density of 0.57 J/cm3 and an energy storage efficiency of 91.3%. This research provides a method to improve the energy storage density and efficiency of BCZT ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Hongbo Liu, Ying Sun
Summary: This study investigates the defects in BiFeO3 and BiFeO3-based ceramics and discusses the conduction mechanism. The results show that doping with Mn and Nb can affect the conductivity.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Xia-Li Liang, Jian-Qing Dai
Summary: BFMO thin films were successfully deposited on FTO/glass substrates via sol-gel technique, with Mn doping showing significant enhancement in properties compared to pure BFO samples. The Mn doping-induced changes in structure, grain size reduction, and oxygen vacancies were identified as underlying mechanisms for the improved performance of BFMO films, making them promising for ferroelectric photovoltaic device applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Jafar Hussain Shah, Anum Shahid Malik, Ahmed Mahmoud Idris, Saadia Rasheed, Hongxian Han, Can Li
Summary: In this study, particulate BFO and Mn-doped BiFeO3 were synthesized by the sol-gel method, demonstrating that Mn doping significantly enhances the oxygen evolution reaction (OER) activity under visible light irradiation. The bandgap of Mn-doped BFO could be reduced by varying the Mn doping amount, leading to improved absorption of visible light and decreased activation energy for water oxidation. Density functional theory (DFT) calculations suggested that surface Fe species are the active sites for water oxidation, with Mn doping leading to the lowest over-potential measured in this study. The synergistic effect of bandgap narrowing in Mn-doped BFO increases the photocatalytic water oxidation activity by inhibiting charge recombination and reducing activation energy.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Materials Science, Ceramics
Hamed Bakhshi, Rasoul Sarraf-Mamoory, Amin Yourdkhani, Shaochang Song, Yu-Chih Tseng, Yurij Mozharivskyj
Summary: The SrTiO3 perovskites doped with Sm3+, Dy3+, and Nb5+ were prepared using the solid state reaction route (SSR) and spark plasma sintering (SPS) process. The SPS process in dynamic vacuum resulted in the formation of Ti3+ and Nb4+ species, leading to increased electrical conductivity. Substituting Sr with Sm and Dy effectively reduced the lattice thermal conductivity and increased the electron mobility and electrical conductivity. The thermoelectric measurements showed that the sample with a chemical composition of Sr0.95Sm0.05Ti0.9Nb0.1O3 reached a high figure of merit (zT) value.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Applied
Zhangyang Zhou, Zhipeng Gao, Zhengwei Xiong, Gaomin Liu, Ting Zheng, Yuanjie Shi, Mingzhu Xiao, Jiagang Wu, Leiming Fang, Tiexing Han, Hao Liang, Hongliang He
Summary: This study reports the electrical response of 0.9BiFeO(3)-0.1BaTiO(3) (BFO-BT) ferroelectric ceramics under shock-wave compression and achieves a record-high power density. The mechanism of shock-induced depolarization and the excellent performance of BFO-BT ceramics are analyzed through in situ high-pressure neutron diffraction.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zunping Xu, Jinchuan Wang, Yi Chen
Summary: Enhanced energy storage properties were observed in Ba0.67-xYxSr0.33Ti0.993Mn0.007O3 films prepared by radio frequency magnetron sputtering technique, attributed to the introduction of Y3+ ion. Increasing Y3+ contents led to higher energy storage density and recoverable energy storage density. Optimizing Y3+ doping contents enhanced the dielectric properties, tunability, and leakage current density of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Jianguo Chen, Jinrong Cheng, Jilin Guo, Zhenxiang Cheng, Jianli Wang, Hongbo Liu, Shujun Zhang
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Hongbo Liu
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Ceramics
Hongbo Liu, Yu Xu
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Hongbo Liu
Summary: A relaxor can exhibit piezoelectricity without a DC bias field, a phenomenon known as the piezoelectric memory effect. This effect is closely related to a local polar phase transition and the softening of the lattice, as indicated by electrical and structural investigations.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Ying Sun, Hongbo Liu, Fangchao Liu, Gang Liu
Summary: Research has shown that thin films of BiFeO3-BaTiO3-SrTiO3 have ultrahigh-energy storage density, but the energy storage properties of ternary bulk ceramics of BiFeO3-BaTiO3-SrTiO3 have not been studied. This study prepared BiFeO3-BaTiO3-SrTiO3 ceramics and found that Mn-doped 0.25BiFeO(3)-0.30BaTiO(3)-0.45SrTiO(3) has the most optimized electrical energy storage properties, with an energy storage density of 1.33 J/cm(3), efficiency of 88.5%, and 90% stored energy releasing in 120 ns.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Wenbin Huang, Hongbo Liu
Summary: A hydrothermal-assisted cold sintering process was developed to prepare antiferroelectric NaNbO3 ceramic, with physical and electrical properties comparable to ceramics made by conventional sintering techniques, but at a lower heat treatment temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Liangwen Hai, Hongbo Liu
Summary: This study prepared tetragonal tungsten bronze ceramics using a conventional solid-state reaction method and investigated their structural, dielectric, and ferroelectric properties. It was found that the dielectric response and polarization-electric field hysteresis loop vary significantly with the Sr/Ba ratio.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Hongbo Liu, Ying Sun
Summary: This study investigates the defects in BiFeO3 and BiFeO3-based ceramics and discusses the conduction mechanism. The results show that doping with Mn and Nb can affect the conductivity.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Physics, Applied
Hongbo Liu, Jianguo Chen
Summary: In this study, the addition of Li2CO3 was found to effectively reduce the sintering temperature of piezoelectric ceramics, allowing for the co-firing of the ceramics with Ag electrodes at low temperatures to manufacture multilayer piezoelectric actuators.
JOURNAL OF ADVANCED DIELECTRICS
(2022)
Article
Engineering, Electrical & Electronic
Huan Wang, Hongbo Liu
Summary: Using a base composition of 0.76Bi(0.5)Na(0.5)TiO(3)-0.24SiTiO(3) near the morphotropic phase boundary of Bi0.5Na0.5TiO3-SiTiO3, Bi(Mg2/3Nb1/3)O-3 was added to prepare ternary dielectric ceramics. The study found that Bi(Mg2/3Nb1/3)O-3 disrupts the long-range ferroelectric ordering, leading to a rapid decrease in remanent polarization and greatly improved electrical energy storage properties in the ternary system.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Liangwen Hai, Hongbo Liu
Summary: In this research, Ca2+ doped Sr0.6Ba0.4Nb2O6 ceramics were designed to adjust the A-site occupancy and their influence on the structure, phase transition, and electric properties of the ceramics were studied. It was found that with increasing x, the ceramics transitioned from pure unfilled tetragonal tungsten bronze to a multiphase of the main tetragonal tungsten bronze and a parasitic CaNb2O6. The properties of CaxSr0.6-xBa0.4Nb2O6 were mainly determined by the tetragonal tungsten bronze phase, including phase transition, dielectric permittivity, and polarization, which were closely related to the site occupancies of Sr2+ and Ba2+ at the A2 sites of the tetragonal tungsten bronze phase.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Hongbo Liu, Wenbin Huang, Tao Deng, Gang Liu
Summary: The study of Mn-doped CaZrO3-NaNbO3 solid solutions showed that Mn doping can significantly reduce leakage current, with an optimal doping concentration of 3% (mole). The solid solutions exhibit stabilized antiferroelectricity when the content of CaZrO3 is less than 6% (mole), and the antiferroelectric ordering is destroyed when the content of CaZrO3 is higher than 6% (mole), resulting in a decrease in polarization.
Article
Engineering, Electrical & Electronic
Weihao He, Hongbo Liu
Summary: A new dielectric ceramic with varying polarization-electric relation from ferroelectric to antiferroelectric and linear-like has been prepared by adding Sr(Fe0.5Nb0.5)O-3 (SFN) using a conventional solid reaction method.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)
