Article
Chemistry, Physical
Muhammad Habib, Myang Hwan Lee, Da Jeong Kim, Fazli Akram, Hai In Choi, Myong-Ho Kim, Won-Jeong Kim, Tae Kwon Song
Summary: By studying three different series of lead-free ceramics, two morphotropic phase boundaries (MPBs) were discovered, revealing the relationship between piezoelectric performance and crystal structure. The significant enhancement in piezoelectric strain response due to local structural heterogeneity caused by La3+ doping serves as the basis for the improvement in ceramic performance.
JOURNAL OF MATERIOMICS
(2021)
Article
Engineering, Electrical & Electronic
Jianjia Zhang, Yue Wen, Mengmeng Hao, Fangfang Zeng, Huitao Guo, Guifen Fan, Wenzhong Lv
Summary: The KNLN-0.06BZ lead-free ceramics prepared by TSS exhibited higher density and better electrical properties compared to those prepared by CS, possibly due to fewer oxygen vacancies facilitating domain switching. Multiple phases may coexist in all ceramic samples, with lower energy barrier at the phase boundary allowing for effective domain switching and resulting in high piezoelectric properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Preston C. Bowes, Gyung Hyun Ryu, Jonathon N. Baker, Elizabeth C. Dickey, Douglas L. Irving
Summary: A first-principles informed grand canonical defect chemistry model is developed to study the effects of different dopants on the resistivity and resistance degradation of BaTiO3. The model qualitatively captures the behavior of the samples, providing insight into the mechanisms behind the observed differences and offering criteria for the search of co-dopants with similar behaviors.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Review
Materials Science, Multidisciplinary
Xuefan Zhou, Guoliang Xue, Hang Luo, Chris R. Bowen, Dou Zhang
Summary: This comprehensive review focuses on the development of lead-free sodium bismuth titanate (BNT) based ceramics, discussing their composition, microstructure, macroscopic properties, and potential applications in various fields. It also highlights the origin of macroscopic behavior, strategies for optimizing functional properties, and current challenges in this area, while introducing the potential applications of BNT-based ceramics in electrocaloric, oxide-ion conduction, and luminescence fields. Future perspectives and emerging research directions in this growing area are also provided.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Crystallography
Mu Song, Xiaoyuan Sun, Qiong Li, Hao Qian, Yunfei Liu, Yinong Lyu
Summary: In this work, lead-free piezoelectric ceramics with low hysteresis and superior electrostrictive coefficient features were designed by enhancing the electrostrictive effect and inhibiting hysteresis through phase transition around ambient temperature. The BT-30ST ceramics showed enhanced electrostrictive coefficient and low hysteresis, making them a prospective option for high sensitivity and high precision displacement actuators.
Article
Materials Science, Ceramics
Shengfang Shi, Hideki Hashimoto, Tohru Sekino
Summary: Lead-free BCZT ceramics were greatly optimized in piezoelectric properties by doping Co ions, with Co2+ and Co3+ playing different roles in enhancing the properties. The content ratio Co3+/Co2+ was found to be correlated with piezoelectric performance, with ceramics containing 0.10 wt% of Co ion showing the best performance.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Mingfang Shu, Bingbing Yang, Miao Liu, Shunjin Zhu, Sumei Li, Chengbing Pan, Jiamingzhu Wang, Lihua Yin, Jie Yang, Xuebin Zhu, Yuping Sun
Summary: The study demonstrates the successful fabrication of lead-free piezoelectric thin films based on BiFeO3 using a solid solution method, achieving a significant increase in effective piezoelectric coefficient to over 500 pm/V.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Engineering, Electrical & Electronic
Javier Camargo, Santiago Osinaga, Mariano Febbo, Sebastian P. Machado, Fernando Rubio-Marcos, Leandro Ramajo, Miriam Castro
Summary: In order to replace toxic lead compounds, researchers have proposed Bi-0.5(Na0.8K0.2)(0.5)TiO3 (BNKT) lead-free piezoceramics as a candidate material for energy harvesting devices. Through a systematic study of the voltage generation of BNKT-based piezoceramics, it was found that they exhibit good ferro-piezoelectric properties and potential technological applications for energy harvesting.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Tianyi Zheng, Yingjie Yu, Yanyun Pang, Daixing Zhang, Yue Wang, Hongyang Zhao, Xu Zhang, Huijie Leng, Xiaoping Yang, Qing Cai
Summary: The reconstruction of the local electrical microenvironment is an effective strategy for bone regeneration. CMBT nanofibers composited with PLLA showed enhanced piezoelectricity, osteogenic activity, antibacterial, and anti-inflammatory activities, making them promising candidates for bone regeneration and function reconstruction.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Xudong Bai, Yongqi Pan, Guannan Li, Zunping Xu, Yi Chen
Summary: A new type of ceramic material with excellent piezoelectric properties and high-temperature stability was fabricated using a traditional solid-state reaction method, showing typical characteristics of morphotropic phase boundary within a specific range of lanthanum doping.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Shenghao Wang, Hongbo Liu, Yuanyuan Wang, Hailan Qin, Jianwei Zhao, Zhilun Lu, Zhu Mao, Dawei Wang
Summary: BF-ST ceramics are a novel class of lead-free dielectric materials with notable dielectric constants and remarkable thermal stability. The microstructure and electrical properties of BF-ST ceramics near the morphotropic phase boundary were comprehensively investigated. The findings show that increasing the SrTiO3 content leads to changes in phase fractions and the formation of a distinctive heterogeneous core-shell microstructure.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Jikai Shi, Jiayi Liu, Shaoxiong Xie, Kui Chen, Huijing Zheng, Bo Wu, Jianguo Zhu, Qingyuan Wang
Summary: A new lead-free ceramic system with superior comprehensive performance has been successfully prepared, exhibiting multiphase coexistence and excellent piezoelectric, electrostrictive, and electrocaloric effects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Shuang Yan, Zhenzhu Cao, Qiang Liu, Yanfang Gao, Hong Zhang, Guorong Li
Summary: Lead-free piezoelectric ceramics were prepared by conventional solid-reaction method. The coexistence of orthohombic and tetragonal phase near room temperature was confirmed at x = 0.025. The ceramic with x = 0.025 showed excellent electrical properties due to the presence of the polycrystalline phase transitions (PPT) effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
C. Groppi, L. Mondonico, F. Maspero, C. Rinaldi, M. Asa, R. Bertacco
Summary: Lead-free piezoceramics, specifically (K0.5Na0.5)NbO3 (KNN) thin films, grown on Pt(111)/TiO2/SiO2/Si substrates by pulsed laser deposition show promising piezoelectric properties, with a piezoelectric coefficient d(33) of about 80pm/V. Proper treatment of the Pt substrate is crucial for film quality and electric, ferroelectric, and piezoelectric properties, paving the way for integration of these KNN films into microfabricated actuator devices.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Jing Shi, Rizhuang Dong, Jiayi He, Daowei Wu, Wenchao Tian, Xiao Liu
Summary: This study investigated the structural, dielectric, and ferroelectric properties of lead-free ceramics based on the ternary system of BaTiO3 (BT). It was observed that the dopant concentration influenced the structural evolution from tetragonal to pseudocubic phase. The dielectric response showed diffusive peaks and relaxor behavior, indicating a transition from ferroelectric to relaxor state. The ceramics exhibited slim polarization hysteresis loops and electrical inhomogeneities caused by excessive dopant addition, leading to degraded electric breakdown strength. The oxygen vacancy hopping mechanism was proposed to explain the diffuse dielectric response at high dopant concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shengnan Zhang, Chunlin Zhao, Kai Zhu, Jiaqi Zhao, Yinyi Gao, Ke Ye, Jun Yan, Guiling Wang, Dianxue Cao
Summary: Aqueous Mg ion batteries (AMIBs) have great potential for energy storage due to their high capacity, abundant resource, and environmental friendliness. However, the scarcity of suitable anode materials limits the development of AMIBs. In this study, a new polymer anode material with a flower-like nanosheet structure is synthesized for aqueous Mg-Na hybrid-ion battery. The polymer electrode material exhibits high discharge specific capacity and maintains its framework structure during the cycling process of the hybrid-ion battery.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Lin Zhao, Huijing Zheng, Ziyu Ma, Wenjuan Wu, Min Chen, Hong Tao, Jian Ma, Chunlin Zhao, Bo Wu
Summary: By adjusting the structure, a KNN-based relaxor ceramic was designed to simultaneously achieve high electrostrictive strain and Q33. It exhibited low hysteresis electrostrictive strain and outstanding temperature stability in the temperature range of 20-180°C. These results will contribute to accelerating the application of KNN-based electrostrictive materials in actuators.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xiao Wu, Yaojia Lu, Jinfeng Lin, Fangyuan Yu, Chunlin Zhao, Cong Lin, Min Gao, Tengfei Lin, Qiwei Zhang
Summary: A novel strategy for achieving completely reversible photochromic (PC) regulation based on KNN-based thick films is proposed. The PC self-recovery behavior can be optimized by forming inter-electronic levels via Tm/Yb co-doping in KNN. The obtained thick films exhibit a reversible PC self-recovery reaction within 6 min. This work is expected to provide effective guidance for the further utilization of PC materials.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Yilong Li, Wenkai Shen, Guoqing An, Zhenbin Du, Ping He, Weige Wu, Chunlin Zhao, Tong Zhou, Shili Jiang, Xinxing Qian
Summary: This paper evaluates the heat transfer performance of transformers using FR3 insulating oil through experiments and numerical simulations. The results show that FR3 insulating oil has better heat transfer performance than mineral oil in the ODAF cooling mode. With an increase in coil heat load, FR3 insulating oil demonstrates enhanced cooling performance, particularly in the vicinity of the guide plate.
HEAT AND MASS TRANSFER
(2023)
Article
Materials Science, Ceramics
Jiahao Jiang, Shuaimin Chen, Chunlin Zhao, Cong Lin, Xiao Wu, Min Gao, Tengfei Lin, Changqing Fang
Summary: This study employed two-step cold sintering process (CSP) under different pressures to prepare (K0.5Na0.5)NbO3 (KNN) ceramics, and found that the density of KNN green pellets can be increased by enhancing the pressure of the second-step CSP. Furthermore, it was observed that high pressure can accelerate the dissolution of K+ and result in more Na+ in some grains, and the diffusion rate of Na+ in grains is better than K+, which promotes the growth of grains. As a result, the piezoelectric property is improved even at low ceramic density due to the larger grains with higher performance composition. Hence, the pressure and inhomogeneous dissolution of alkali metal ions in CSP play a significant role in grain growth and piezoelectric enhancement.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yuntao Huang, Haoyue Xue, Ting Zheng, Jiagang Wu
Summary: Achieving excellent pyroelectric performance is challenging for lead-free piezoelectric ceramics. In this study, (1-x)K0.48Na0.52NbO3-xBi(0.5)Ag(0.5)ZrO(3)-0.2%Fe2O3 (KNN-BAZ-Fe) lead-free ferroelectric ceramics with high Curie temperatures were prepared to improve pyroelectric performance. The variation of BAZ content promoted grain growth and resulted in the best pyroelectric coefficient when x = 0.05.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Xiao Wu, Fangyuan Yu, Rui Xiong, Peng Wang, Ping Zhou, Baisheng Sa, Cong Lin, Chunlin Zhao, Min Gao, Qiwei Zhang
Summary: Through ion-doping induced defect engineering, a strategy to construct deep-lying traps in (K0.5Na0.5)-NbO3-based ferroelectric ceramics is proposed, enabling the realization of highly transparent ceramics with ultrafast photochromic response time, high efficiency, and high rate, making them promising for optical storage and imaging applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yu Zhang, Lijuan Huang, Chung Ming Leung, Wei Zhang, Zhixin Xu, Jiaxing Xie, Wuming Xue, Xiao Wu, Chunlin Zhao, Tengfei Lin, Cong Lin, Min Gao
Summary: The electric-field-modulation (E-modulation) of photoluminescence (PL) properties in rare-earth Er3+-doped Pb0.96La0.04Zr0.9Ti0.1O3 (PLZT) antiferroelectrics (AFEs) has been investigated. The AFE phase stability of PLZT doped with various Er contents and their E-modulated PL properties have been systematically studied. The ceramics exhibit both upconversion and downconversion PL effects and show excellent E-dependent dual-mode PL tunability, demonstrating the potential for optoelectronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Chao Wu, Xiaopeng Wang, Ying Tang, Haoyin Zhong, Xin Zhang, Anqi Zou, Jiliang Zhu, Caozheng Diao, Shibo Xi, Junmin Xue, Jiagang Wu
Summary: A fundamental understanding of the surface reconstruction process is crucial for the development of efficient electrocatalysts based on the lattice oxygen oxidation mechanism (LOM). Contrary to previous beliefs, the surface reconstruction in LOM-based metal oxides is found to be a spontaneous chemical reaction process rather than an electrochemical process. During this process, lattice oxygen atoms are attacked by adsorbed water molecules, leading to the formation of hydroxide ions (OH-). The leaching of metal-site soluble atoms from the oxygen-deficient surface also occurs. Additionally, it is discovered that enhancing surface hydrophilicity can accelerate the surface reconstruction process, providing further insights into the mechanism.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Ceramics
Chunlin Zhao, Tao He, Cong Lin, Xiao Wu, Tengfei Lin, Min Gao, Hong Tao, Wenjuan Wu, Bo Wu
Summary: The electrical properties of single-phase BT ceramic and phase-coexistence BT-based (BTS-0.15BCT) ceramic were compared with respect to the evolution with an electric field. It was found that the dielectric, ferroelectric, piezoelectric, and strain properties are all dependent on the electric field, especially for BTS-0.15BCT ceramic with small domains and easy polarization rotation induced by phase coexistence. The phase-coexistence BT-based ceramic exhibits electric field-related properties due to its soft structure, while this effect cannot be observed in BT ceramic with stable phase structure and large domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Composites
Biao Xia, Cheng Shi, Zhou Li, Tengfei Lin, Min Gao, Chunlin Zhao, Xiao Wu, Cong Lin, Jinyun Wang
Summary: The rapid development of photochromic devices has led to great interest in the design and preparation of luminescent materials. Introducing fluorescent powder ZnS:Cu into a cross-linked polymer matrix is an efficient and simple method to obtain photochromic materials with excellent comprehensive performance. However, the traditional method of physically mixing fluorescent powder into the polymer matrix has limitations in terms of internal defects, mechanical properties, and luminescence efficiency. This study successfully modified fluorescent powder with 3-mercaptopropionic acid and introduced it into epoxy silicone rubber, resulting in a recyclable luminescent elastomer with improved mechanical properties and luminescence performance.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Ceramics
Fangyuan Yu, Bowen Ma, Ziqian Xie, Peng Wang, Xiao Wu, Cong Lin, Chunlin Zhao, Min Gao, Laihui Luo, Qiwei Zhang
Summary: In this study, (K0.5Na0.5)0.95Ba0.04Er0.01NbO3 (4Ba-1Er-KNN) transparent ceramics were successfully prepared for potential applications in temperature detection and optical information storage in smart windows. The ceramics exhibit non-destructive luminescence readout, ultra-high photochromic contrast, and rapid response time. Furthermore, they also demonstrate excellent low-temperature sensing performance. The integration of these features allows for the development of multi-functional smart windows.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Crystallography
Chunlin Zhao, Haopeng Feng, Yanli Huang, Xiao Wu, Min Gao, Tengfei Lin, Cong Lin
Summary: In this study, the evolution characteristics of electrical properties in polymorphic piezoceramics were systematically investigated. Ba(Ti0.92Zr0.08)O-3 ceramics were selected as a paradigm. The results showed that the evolution of electrical properties with temperature change could be divided into three stages, and exhibited different characteristics with increasing electric field. Additionally, the highest values of d(33)* and Q(33) were obtained at the O-T phase.
Article
Chemistry, Multidisciplinary
Wanqian Cai, Chongbiao Zhang, Yourong Wu, Wei Wang, Mei Lin, Tengfei Lin, Cong Lin, Min Gao, Chunlin Zhao, Xiao Wu
Summary: Waste moxa ash was modified by ball milling in hydrogen peroxide, resulting in carbon-based materials with excellent adsorption performance. These materials showed ultrafast removal of the antineoplastic drug mitoxantrone from water, with removal efficiency reaching 97.66% in 1 minute and 99.72% in 30 minutes. The study provides a simple and environmentally friendly solution for controlling mitoxantrone pollution.
Article
Obstetrics & Gynecology
Chunlin Zhao, Jingru Ji, Shenghui Lu, Fang Wang, Hailan Yang
Summary: This case report highlights a rare occurrence of gastric carcinoma during pregnancy. The patient initially presented with confusing symptoms and was misdiagnosed. Eventually, the malignancy was confirmed and the patient underwent termination of pregnancy and chemotherapy, but succumbed to pneumonia. It emphasizes the importance of clinicians being aware of this rare possibility and considering cancer as a differential diagnosis in pregnant women with prolonged gastrointestinal symptoms.
MATERNAL-FETAL MEDICINE
(2023)
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)
