Article
Chemistry, Physical
Weipeng Lin, Manwen Yao, Jian Lin, Xi Yao
Summary: Researchers focused on exploring the potential of PbTiO3 (PT) relaxor ferroelectrics for the development of miniaturized high-precision piezoelectric devices. Partial substitution of Pb(Mg1/3Nb2/3)O3 (PMN)-PT with Pb(Ni1/3Nb2/3)O3 (PNN)-PT was found to improve dielectric and piezoelectric properties. However, the factors underlying the performance improvement of the PNN-PMN-PT ternary system remained unclear. To address this, ceramics with different PT content were fabricated and their crystal structure and electrical properties were investigated. The 0.128PNN-0.536PMN-0.336PT composition exhibited optimum performance, indicating its potential for applications in transducers and actuators.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Takuro Kawasaki, Tatsuo Fukuda, Satoru Yamanaka, Tomokazu Sakamoto, Ichiro Murayama, Takanori Katou, Masaaki Baba, Hideki Hashimoto, Stefanus Harjo, Kazuya Aizawa, Hirohisa Tanaka, Masatoshi Takeda, Tohru Sekino, Tadachika Nakayama, Yoonho Kim
Summary: The microscopic origin of pyroelectric power generation using ferroelectric ceramics for energy harvesting from time-varying waste heat has been investigated through operando neutron diffraction measurements. The behaviors of domain orientation and lattice strain in lead zirconatetitanate-based ceramics during the power generation cycle combining electric field and temperature change were studied. Larger structural changes in the material and cycle conditions were found to give higher power density.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
B. Srimathy, J. Kumar
Summary: Rare-earth Nd-doped lead zinc niobate-lead titanate (Nd:PZN-PT) and W-doped lead zinc niobate-lead titanate (W:PZN-PT) single crystals were grown by self-flux technique, with pure perovskite phases observed. The doped crystals showed enhanced relaxor behavior, as evidenced by diffuse phase transitions and frequency dispersive phenomena in the dielectric peaks. Additionally, doping had a significant impact on the dielectric constant, AC conductivity, and piezoelectric properties of the crystals, with a simple domain switching mechanism observed in the hysteresis behavior.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Jiaming Li, Enwei Sun, Yaping Ma, Huashan Zheng, Hua Zhao, Zhiguo Zhang
Summary: This study proposes a method to quantitatively characterize the phase transition processes of ferroelectric materials using fluorescence wavelength shift, demonstrating exact consistency between changes in fluorescence peak positions and structural phase transitions. The contactless, non-destructive fluorescence method provides localized quantitative analysis for phase transition processes in ferroelectric materials. The method based on fluorescence peak wavelength dependence on crystal environment may potentially be applied to characterize phase transitions in other ferroelectric materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Hao Chen, Tao Pu, Shibo Fan, Hong Liu, Jianguo Zhu, Qiang Chen
Summary: Low-temperature sintering PNN-PMW-PZT ceramics doped with different Yb2O3 contents were studied for their phase structure, microstructure, dielectric, piezoelectric, and ferroelectric properties. Doping with Yb2O3 was found to enhance the electrical properties of the samples, with ceramics doped with 0.10 mol% Yb2O3 exhibiting the highest tetragonal phase content and d 33 values. The relationship between Yb2O3 doping and electrical properties was discussed.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
S. Gowthami, G. Anandha Babu, C. Manikandan, E. Varadarajan, R. M. Sarguna
Summary: PMINT ternary ceramics doped with Eu2O3 were prepared and showed enhanced piezoelectric and induced strain properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Manish Badole, Hari Narayanan Vasavan, Samriddhi Saxena, Asish Kumar Das, Velaga Srihari, Sunil Kumar
Summary: The effects of La3+ and Al3+ substitution on the structural, dielectric, and piezo-electric properties of (1-x)(K0.5Bi0.5)TiO3-xLaAlO3 ceramics were investigated. With the increase in LAO content, a decrement in tetragonal distortion and an increase in cubic symmetry were observed. The incorporation of LAO in KBT resulted in an improved relaxor behavior and a suppression of oxygen vacancies. The piezo-electric properties were enhanced, with the 3% LAO-doped sample exhibiting the highest piezo-electric charge coefficient and improved piezo-electric voltage coefficient. An energy harvesting experiment was performed on the poled 3% LAO-doped ceramic, showing promising results under normal finger tapping.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Kriti Batra, Nidhi Sinha, Binay Kumar
Summary: The study investigated the synthesis and properties of pure and Ba-doped ZnO nanoparticles for potential application as piezoelectric fillers in composite nanogenerators. The Ba-doped ZnO showed improved structural, ferroelectric, and piezoelectric properties compared to pure ZnO, making it a promising candidate for mechanical energy harvesting and portable electronics. With a filler concentration of 30 wt%, the Ba-ZnO:PDMS composite device generated the highest open-circuit output voltage of 10.5 V under compression, emphasizing its potential practical application.
Article
Chemistry, Inorganic & Nuclear
Hongjiang Li, Lixu Xie, Zhi Tan, Jie Xing, Xu Li, Hao Chen, Fei Wang, Manjing Tang, Jianguo Zhu, Yuan Cheng
Summary: This study suggests a simple approach to achieve excellent piezoelectric performances in potassium sodium niobate (KNN)-based ceramics by optimizing the content of nonstoichiometric Nb5+. Excessive Nb5+ significantly influences the microstructural features and electrical properties of the ceramics, improving their temperature stability. The results show that a high Curie temperature (TC), large electromechanical coupling factor (kp), and high piezoelectric constant (d33) can be simultaneously obtained in the KNN-based ceramics with nonstoichiometric Nb5+.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kriti Batra, Nidhi Sinha, Binay Kumar
Summary: This study reports the influence of Nd-dopant on the structural, microstructural and di-/ferro-/piezo-electrical properties of lead-free binary piezoelectric perovskite system KNN-BNZ. Nd-doping resulted in reduced grain size and curie phase transition temperature, while enhancing the piezoelectric response and fatigue stability of the ceramic material.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
Y. Sakout, O. El Ghadraoui, E. H. Lahrar, M. Zouhairi, N. Tijani, A. Harrach, T. Lamcharfi, M. Haddad, K. El Yamni
Summary: In this work, an experimental study was conducted to investigate the structural and dielectric properties of nickel-doped Pb1-xNixTiO3 ceramics. The results showed that the introduction of nickel cations transformed the crystal structure from orthorhombic to pseudo-cubic, and the average grain size decreased with increasing nickel concentration. The dielectric analysis revealed enhanced dielectric constant, transition temperature, and dielectric loss in the doped compositions.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Don Biswas, Prolay Sharma, N. S. Panwar
Summary: In this work, pellet samples of (Ba1-xCaxZr0.1Ti0.9)O-3 with varying compositions were prepared and their dielectric and structural properties were measured. Results show a strong compositional dependent behavior in the physical properties, indicating a morphotropic phase transition type behavior at x = 0.150 composition.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Xiaojun Wu, Wei Shi, Shangyi Guan, Shuhao Wang, Yuan Cheng, Lixu Xie, Hao Chen, Zhi Tan, Yugen Xu, Qiang Chen
Summary: A series of CNCBT-NBT ferroelectric ceramics were prepared, with the introduction of (Na0.5Bi0.5)(2+) to improve their piezoelectric and ferroelectric properties, as well as enhance the temperature stability of piezoelectric activity. While TC shows a decreasing trend with increasing doping concentration, some samples still maintain high T-C values.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yooun Heo, Marin Alexe
Summary: Enhancing the piezoelectric property of BiFeO3 single crystals using light as a control parameter can result in a locally enhanced effective piezoelectric coefficient, d(zz), showing almost a sevenfold increase. This phenomenon is explained with theoretical models involving the bulk photovoltaic effect and Schottky barrier effect, and the role of open-circuit voltage and photocharge carrier density. These results offer key insights into light-induced piezoelectricity enhancement for potential multifunctional optoelectronic devices.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yuqing Zhou, Changqing Guo, Guohua Dong, Haixia Liu, Ziyao Zhou, Ben Niu, Di Wu, Tao Li, Houbing Huang, Ming Liu, Tai Min
Summary: In this study, zigzag wrinkle morphology was fabricated on inorganic thin films to modulate ferroelectric domains and create a superstructure with periodic surface charge distribution. This unique structure can be switched using strain gradient and provides a means to regulate cells and polar molecules in physiological and bioelectric applications.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)