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, Ceramics
Dongyang Chen, Yujie Yang, Congliang Chen, Yuting Meng, Yingming Zhang, Cong Zhang
Summary: A new type of high-entropy rare-earth iron garnet ceramic with garnet crystal structure was synthesized using a solid-phase method. The microstructure and magnetic properties of the ceramics were evaluated. The magnetism of these ceramics can be fine-tuned by customizing their composition.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Multidisciplinary
Paul Loubeyre, Florent Occelli, Paul Dumas
Summary: This study investigates the influence of nuclear quantum fluctuations on the properties of dense hydrogen, focusing on its potential metallization. Raman spectroscopy and synchrotron infrared absorption measurements are conducted on deuterium at 460 GPa and 80 K, revealing the isotopic effects on the electronic and vibrational properties in phase III. The findings also suggest a probable transition to metal deuterium, occurring at a shifted pressure compared to hydrogen, and are compared to advanced calculations quantifying the reduction of the band gap caused by nuclear quantum fluctuations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jianwei Zhao, Stephen D. Funni, Emily R. Molina, Elizabeth C. Dickey, Jacob L. Jones
Summary: Under the application of an external voltage, high electric field concentrations develop around the interdigitated electrode edges inside multilayer ceramic actuators (MLCAs). The local inhomogeneity in the electromechanical response is caused by the spatial distribution of the local electrical field. By utilizing synchrotron-based high-energy X-ray diffraction (XRD), the structural changes in partially electroded Nb-doped PbZrxTi1-xO3 samples as a function of applied electric field were investigated. The results show that the domain switching behavior and phase transitions are spatially dependent across the inactive regions in partially electroded samples, especially near the electrode edge and the tetragonal composition near the morphotropic phase boundary (MPB).
Article
Chemistry, Physical
Simon R. Larsen, Daniel Hedlund, Henry Stopfel, Dennis Karlsson, Christian K. Christensen, Peter Svedlindh, Johan Cedervall
Summary: The alloys of AlCoCrFeMnxNi were synthesized through arc-melting and gas atomisation to study the effect of Mn additions. It was found that an increase in Mn content adversely affected the thermal stability and saturation magnetisation of the alloy compared to AlCoCrFeNi.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xi Shi, Udo Eckstein, Yizhe Li, David Hall, Neamul H. Khansur
Summary: In situ, spatially-resolved synchrotron X-ray diffraction was used to investigate the electric field-induced phase transformation of nonergodic relaxor 0.93Na(1/2)Bi(1/2)TiO(3)-0.07BaTiO(3) ceramics. The study found that the copper electrode side coated by aerosol deposition exhibited more significant lattice strain and domain texture compared to the platinum side deposited by sputter deposition.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Murat Balci, Buket Saatci, Hasan Turk, Mehmet Ari
Summary: Ceramic powders co-doped with rare earth oxides were synthesized through solid state reactions, with Dy-rich samples showing better stabilization of the cubic 6-phase. The dopant content ratios and concentrations significantly influenced electrical conductivity and phase stabilization.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Yizhe Li, Peter Cowin, Bing Wang, Annette Kleppe, Tim P. Comyn, David A. Hall
Summary: In-situ synchrotron X-ray diffraction was used to study K0.5Bi0.5TiO3-BiFeO3-PbTiO3 ceramics with a Curie temperature around 450 degrees C. The study revealed a self-adapting mechanism in tuning intergranular stress through partial phase switching, which enhanced domain switching behavior in both tetragonal and rhombohedral phases. This mechanism could be exploited in other perovskite systems for high performance high temperature piezoelectric ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
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, Ceramics
Hui Wei, Jing Li, Feng Hu, Yang Han, Bensong Chen, Honglin Li, Yang Zhang, Xiaodong Wang, Xiaoyong Xu
Summary: This study analyzed the characteristics and crystal structure of ZrW2-xMoxO8 (0≤x≤1). The materials exhibited a systematic change in the coefficient of thermal expansion, from negative values to zero thermal expansion, with increasing x. The study also investigated the mechanism of the ordered-disordered phase transition and the impact of Mo substitution on the electronic structure using in-situ X-ray diffraction and in-situ Raman spectroscopy.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Muhammad Sheeraz, Mamoon Ur Rashid, Asad Ali, Fazli Akram, Ho Jeong Lee, Jin San Choi, Jong-Seong Bae, Yong Soo Kim, Young -Han Shin, Chang Won Ahn, Tae Heon Kim
Summary: This study investigates the structural evolution of polymorphic phases in Al2O3-inserted SrMnO3 ceramics, identifying the presence of the 6H-hexagonal SrMnO3 phase and examining the chemical compositions and electronic structures of the compounds. First-principles calculations show no clear difference in total energies between the 4H- and 6H-hexagonal polymorphs, regardless of the presence of Sr and oxygen vacancies. Possible origins are discussed based on refined lattice parameters of the 6H SrMnO3 phase.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Tao Jin, Long Yang, Xinyue Zhang, Wen Li, Yanzhong Pei
Summary: The symmetry of crystal structure in real space can be maintained in reciprocal space, which is important for the design of thermoelectric materials. Using the relationship between inter- and intra-layer geometric information allows for the comparison of crystal structures with desired symmetry.
Article
Multidisciplinary Sciences
S. Galeski, T. Ehmcke, R. Wawrzynczak, P. M. Lozano, K. Cho, A. Sharma, S. Das, F. Kuester, P. Sessi, M. Brando, R. Kuchler, A. Markou, M. Konig, P. Swekis, C. Felser, Y. Sassa, Q. Li, G. Gu, M. Zimmermann, O. Ivashko, D. Gorbunov, S. Zherlitsyn, T. Foerster, S. S. P. Parkin, J. Wosnitza, T. Meng, J. Gooth
Summary: A 3D quantum Hall effect has been observed in the Dirac semimetal ZrTe5 due to a magnetic-field-driven Fermi surface instability. The study shows evidence of quasi-quantized Hall response without Fermi surface instability, attributing it to the interplay between the intrinsic properties of ZrTe5 electronic structure and its Dirac semi-metallic character.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
N. A. Wojcik, K. Polcyn, J. Karczewski, K. Gornicka, R. J. Barczynski
Summary: In this study, the topography, structure, thermal, magnetic, and electrical properties of Fe-doped Bi4V2_xFexO11-delta ceramics were investigated. It was found that iron-rich nanocrystals formed on the Bi-Fe-V-O grains, and the grains were mainly composed of tetragonal Bi4V1.5Fe0.5O10.5 phase. Different phase transitions and magnetic anomalies were observed in ceramics doped with different Fe concentrations, and the conductivity measurements revealed different conduction mechanisms at different temperature ranges.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Simon R. Larsen, Daniel Hedlund, Rebecca Clulow, Martin Sahlberg, Peter Svedlindh, Erna K. Delczeg-Czirjak, Johan Cedervall
Summary: The magnetic properties of the (Mn,Co)(23)B-6 compound were investigated using synchrotron X-ray diffraction, neutron powder diffraction, magnetometry, and electronic structure calculations. The study revealed mixed metal occupancies in the compound and a ferrimagnetic structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Chuang Tian, Zhaofei Tong, Lei Huang, Qingrong Yao, Jianqiu Deng, Qianxin Long, Lichun Cheng, Zhongmin Wang, Jiang Wang, Huaiying Zhou, Guanghui Rao
Summary: Doping Mn into BiFeO3 can significantly improve its magnetic and microwave absorbing properties, with changes observed in the structure and morphology of the nanoparticles.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Metallurgy & Metallurgical Engineering
Wang Jin, Li Yu-shan, Liu Peng, Wang Feng, Yao Qing-rong, Zou Yong-jin, Zhou Huai-ying, M-Sadeeq Balogun, Deng Jian-qiu
Summary: This study demonstrates that hard carbon derived from renewable bagasse is a promising anode material for sodium-ion batteries, with excellent electrochemical properties including high reversible capacity and good cycle stability. The simple and cost-effective preparation process adds to its potential for practical application in energy storage devices.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Chemistry, Physical
Zhongmin Wang, Xiangdong Yan, Feng Wang, Tuzhi Xiong, M-Sadeeq Balogun (Jie Tang), Huaiying Zhou, Jianqiu Deng
Summary: MnO2 nanowires coated with reduced graphene oxide (MnO2@rGO) show excellent performance as anode materials for potassium ion batteries (KIBs) and sodium ion batteries (SIBs). The coating of rGO facilitates ion transfer and enhances electronic conductivity.
Article
Chemistry, Physical
Chuang Tian, Qingrong Yao, Zhaofei Tong, Guanghui Rao, Jianqiu Deng, Zhongmin Wang, Jiang Wang, Huaiying Zhou, Jingtai Zhao
Summary: This study investigated the influence of Nd substitution on the microstructure and magnetic characteristics of Bi1-xNdxFeO3 nanopowders, and found that an appropriate amount of Nd doping can significantly enhance the microwave absorption performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Mingzhong Yuan, Qingrong Yao, Huaiying Zhou, Qianxin Long, Jianqiu Deng, Jiang Wang, Changrong Li, Guanghui Rao
Summary: The study on Pr2Fe17-xCrx alloys reveals that the saturation magnetization and minimum absorption peak frequency increase with the increase in Cr doping amount, while the minimum reflection loss first decreases and then increases. The Pr2Fe16.9Cr0.1 composite absorber shows excellent microwave absorption properties with a minimum reflection loss value of up to -33.81 dB at 7.28 GHz and an effective absorption bandwidth of 2.24 GHz.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Zhihui Li, Qingmeng Gan, Yifan Zhang, Jing Hu, Peng Liu, Changhong Xu, Xibing Wu, Yilin Ge, Feng Wang, Qingrong Yao, Zhouguang Lu, Jianqiu Deng
Summary: The study designed and constructed a Sb-based material FeSb@C/N subset of 3DC/N, which showed high-rate and long-cycle stability as an anode for potassium-ion batteries. The research revealed that the high-rate performance of the FeSb@C/N subset of 3DC/N electrode originated from pseudocapacitance contribution.
Article
Chemistry, Physical
Xibing Wu, Ning Qin, Feng Wang, Zhihui Li, Jiayao Qin, Guojing Huang, Dianhui Wang, Peng Liu, Qingrong Yao, Zhouguang Lu, Jianqiu Deng
Summary: A new Ti-deficient rutile titanium dioxide material was achieved via univalent ion doping and evaluated as an anode for aqueous aluminum-ion batteries, showing high reversible capacity and stability, indicating the potential for improving electrode materials for such batteries through cationic defect engineering.
ENERGY STORAGE MATERIALS
(2021)
Article
Materials Science, Ceramics
Zhao Fei Tong, Chuang Tian, Qingrong Yao, Jinxiang Guo, Qihua Liang, Jianqiu Deng, Fangyu Gan, Jiang Wang, Huaiying Zhou, Guanghui Rao
Summary: In this study, a high-purity NdFe1-xNixO3 material was prepared by a sol method, and it was found that by adding a certain amount of nickel, the dielectric and magnetic properties of the material can be adjusted to a balance point, showing excellent microwave absorption performance.
CERAMICS INTERNATIONAL
(2022)
Letter
Materials Science, Multidisciplinary
Luo-Yang Li, Feng-Bin Huang, Jing Deng, Peng Liu, Feng Wang, Qing-Rong Yao, Zhong-Min Wang, Huai-Ying Zhou, Jian-Qiu Deng
Article
Chemistry, Multidisciplinary
Changhong Xu, Yifan Zhang, Shupei Jia, Yilin Ge, Peng Liu, Feng Wang, Qingrong Yao, Jianqiu Deng
Summary: The rationally designed NiSb@PEO hierarchical hollow nanospheres effectively address the issue of capacity fade in the anode of sodium-ion batteries during cycling. This structure alleviates volume expansion and mechanical stress, facilitating the formation of a stable interface film, resulting in excellent cycling performance and high reversible capacity even at high current densities.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Jinxiang Guo, Zhaofei Tong, Qihua Liang, Fangyu Gan, Lepeng Wei, Qingrong Yao, Jianqiu Deng, Zhao Lu, Huaiying Zhou
Summary: In this study, a Bi1-xPrxFeO3 material with perovskite structure was prepared using the sol-gel self-propagating combustion method. The introduction of Pr was found to influence the dielectric properties and permeability of the material. The results showed that the material with 15% Pr had the lowest reflection absorption loss but a narrow absorption bandwidth.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qiancheng Sun, Weichao Huang, Qingrong Yao, Qianxin Long, Jianqiu Deng, Jiang Wang, Huaiying Zhou
Summary: The microstructure, structure, and overall performance of Nd-Fe-B regenerated magnets are studied after adding low melting point Ho69.3Ni30.7 alloy at the grain boundary. The addition of Ho69.3Ni30.7 alloy optimizes the distribution of the grain boundary phase and weakens the exchange coupling effect between adjacent main phases. It also increases the coercivity and curie temperature of the regenerated magnet. The research achieves the secondary utilization of waste Nd-Fe-B magnets and greatly improves the absorbing performance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Feng Wang, Yikuan Luo, Peng Liu, Muhammad-Sadeeq Balogun, Jianqiu Deng, Zhongmin Wang
Summary: This study focuses on improving the performance of LiNi0.8Co0.1Mn0.1O2 as a cathode material for lithium-ion batteries through modification methods. The modified sample showed superior performance in terms of capacity retention after cycling and rate capability, which can be attributed to the decreased charge transfer resistance and increased Li+ transmission.
Article
Materials Science, Multidisciplinary
Yang Wu, Ting Ouyang, Tuzhi Xiong, Zhao Jiang, Yuwen Hu, Jianqiu Deng, Zhongmin Wang, Yongchao Huang, M. -Sadeeq (Jie Tang) Balogun
Summary: The study presents a unique hierarchical-networked all-carbon electrode to address the challenges in developing thick electrodes for high areal capacity lithium ion batteries. This electrode demonstrates excellent performance with high reversible capacity and rate capability, utilizing a combination of micrometer-sized carbon fibers, nano-sized carbon nanotubes, and pyrolytic carbon. Insights into the lithium ion storage mechanism and the construction of high mechanical stability thick electrodes are provided for future battery technologies.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sun Qiancheng, Yao Qingrong, Long Qianxin, Huang Weichao, Deng Jianqiu, Wang Jiang, Rao Guanghui, Zhou Huaiying
Summary: By adding Ho63.3Fe36.7 alloy to the waste magnets, improvements in magnetic properties can be achieved in the regenerated magnets, increasing coercivity and decreasing maximum magnetic energy product. Additionally, the grain boundary phases in regenerated magnets enhance their coercivity, positively affecting the maintenance of magnetic remanence.
RARE METAL MATERIALS AND ENGINEERING
(2021)
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)