ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tao Xia,Yifeng Han,Chuanhui Zhu,Zhongxiong Sun,Chongyang Yuan,Qi Cui,Jin-Guang Cheng,Wei Du,Wenting Li,Kui Xie,Keke Huang,Shouhua Feng,David Walker,Man-Rong Li
High-pressure heaters in large volume presses must reconcile potentially contradictory properties, and the whole high-pressure and high-temperature (HPHT) community has been engaged for years to seek a better heater. LaCrO3 (LCO)-based ceramic heaters have been widely applied in multianvil apparatus; however, their performance is far from satisfactory, motivating further research on the chemical optimization strategy and corresponding thermochemical mechanism. Here, we adopted a chemical-screening strategy and manufactured tubular heaters using the electrically, chemically, and mechanically optimized Sr–Cu codoped La0.9Sr0.1Cr0.8Cu0.2O3−δ (LSCCuO-9182). HPHT examinations of cylindrical LSCCuO-9182 heaters on Walker-type multianvil apparatuses demonstrated a small temperature gradient, robust thermochemical stability, and excellent compatibility with high-pressure assemblies below 2273 K and 10 GPa. Thermochemical mechanism analysis revealed that the temperature limitation of the LSCCuO-9182 heater was related to the autoredox process of the Cu dopant and Cr and the exchanging ionic migration of Cu and Mg between the LSCCuO-9182 heater and the MgO sleeve. Our combinatorial strategy coupled with thermochemical mechanism analysis makes the prioritization of contradictory objectives more rational, yields reliable LCO heaters, and sheds light on further improvement of the temperature limitation and thermochemical stability.
研究领域:
材料科学
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化学
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物理学
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高压科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guilin Wei,Xiaoyan Shu,Jiahong Wang,Shibing Zuo,Kuan Wu,Guoliang Zhao,Fen Luo,Wenhong Han,Chen Xu,Xirui Lu
Effective disposal of radioactive waste is crucial for safe development of nuclear energy. In this study, flash sintering technology is used for the first time to quickly solidify simulated Sr-contaminated soil waste. The waste can be converted into a glass–ceramic phase by heating the waste at 1100 °C for 1 min during flash sintering. The phase evolution during flash sintering as a function of density and amorphous fraction was systematically investigated. Additionally, the microstructural evolution of the matrices and the leaching behavior of simulated waste elements (e.g., Sr) were evaluated. This study explores the feasibility of using flash sintering for treating radioactive contamination waste.
研究领域:
材料科学
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环境科学
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核能工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wenbin Shi,Ping Yang,Xiao Zhang
Low photoluminescence quantum yields (PLQYs) and poor stability limited the application of violet-emitting CsPbCl 3 nanocrystals (NCs). In this paper, highly stable and bright CsPbCl 3 NCs were studied by combining Sr doping at Pb sites with surface passivation using n-octylphosphonic acid (OPA). A novel hot-injection route was developed by employing acetate precursors and chlorotrimethylsilane. Comprehensive characterization revealed that Sr 2+ possessed similar ionic radius with Pb 2+ to effectively reduce lattice defects and enlarge the band gap, thereby inducing a blue-shifted PL peak. Simultaneously, the OPA ligand, leveraging the strong coordination ability of its phosphonic group, binds firmly to surface metal ions, effectively passivating surface defects and forming a hydrophobic barrier. Sr:CsPbCl 3 NCs created using optimized conditions exhibit a PL peak of 405 nm with a remarkable PLQY of 90.7%. The effect of Sr doping on the fluorescence decay kinetics of Sr:CsPbX 3 NCs was discussed. Furthermore, these NCs demonstrate outstanding stability under ambient atmospheric conditions, continuous UV light irradiation, and in polar solvents. This synergistic strategy, integrating internal lattice reinforcement and external surface shielding, was successfully extended to Sr:CsPbBr 3 and Sr:CsPbI 3 NCs, demonstrating its general applicability. Finally, high-quality red, green, and violet-emitting films were fabricated, highlighting the great potential for display applications.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yi Cao,Baoping Lin,Ying Sun,Hong Yang,Xueqin Zhang
The series La x Sr 1−x NiO 3−δ (0.3≤x≤1) nanofibers (LNF-x) samples are prepared by using electrospun method. We investigate the structure and the electrochemical properties of LNF-x in detail. As a result, LNF-x nanofibers present a perovskite structure, and the LNF-0.7 sample with high specific surface area display remarkable performance as an electrode material for supercapacitors. The maximum specific capacitance value of 719 F·g −1 at a current density of 2 A·g −1 , which retains 505 F·g −1 at a high current density of 20 A·g −1 , is obtained for LNF-0.7 electrode in 1 M Na 2 SO 4 aqueous electrolyte. Moreover, the LNF-0.7//LNF-0.7 symmetric supercapacitor device using 1 M Na 2 SO 4 aqueous solution is successfully demonstrated. The capacitor device can operate at a cell voltage as high as 2 V, and it exhibits an energy density of 30.5 Wh·kg −1 at a high power density of 10 kW·kg −1 and a high energy density of 81.4 Wh·kg −1 at a low power density of 500 W·kg −1 . More importantly, this symmetric supercapacitor also shows an excellent cycling performance with 90% specific capacitance retention after 2000 charging and discharging cycles. Those results offer a suitable design of electrode materials for high-performance supercapacitors.
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2015
·Vol. 30
·期 6
·1179-1183
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IF 0.399
Zhang Kuibao,Wen Guanjun,Yin Dan,Zhang Haibin
TiO 2 was employed as the waste form for disposal of simulated nuclide Sr. Preparation of Sr bearing rutile was explored under different sintering temperatures and Sr contents. The optimal treatment temperature was confirmed as 1 300 °C for the incorporation of SrO in rutile TiO 2 . Perovskite type SrTiO 3 was prepared as the resultant product. The limited containment capacity of SrO in rutile was speculated to be 56.5wt%. As the SrO content increases, the as-synthesized sample exhibits more porosity because SrTiO 3 phase demonstrates higher density than rutile and SrO. The 28 day normalized leaching rate (LRi) of Sr and Ti will decrease congruously as the SrO incorporation increases. The LR Sr value is lower than 0.1 g·m -2 ·d -1 , which is about 3 orders of magnitude higher than the LR Ti value.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhicong Wei,Junnan Qu,Peilun Shen,Haokai Di,Yang Liu,Liuyang Dong,Yan Huan,Yanling Jin,Haiyun Xie,Qihao Gui,Dianwen Liu
Arsenopyrite, as the main carrier of precious metals and a companion mineral of sulfide ores, needs to be removed in advance before entering the metallurgy process to reduce its impact. The catalytic role of chalcopyrite in enhancing arsenopyrite oxidation under sulfate radical-based advanced oxidation processes (SR-AOPs) was systematically investigated. Through multi-scale characterization (XRD, SEM-EDS, XPS, FTIR, Tof-SIMS, EPR) and electrochemical analysis (OCP, CV, Tafel), this study demonstrates that chalcopyrite significantly accelerates arsenopyrite oxidation. Electrochemical analysis indicates that Chpy optimizes the electron transfer pathway and accelerates the oxidation process of pyrite. Surface analysis identified α-FeOOH/As–O oxide layers and Cu-As/S complexes as critical intermediates. The EPR and quenching experiments demonstrated that multiple activation pathways of chalcopyrite effectively promoted the free radical conversion rate of PDS and enhanced the oxidation efficiency of arsenopyrite. These findings provide mechanistic insights into chalcopyrite-driven arsenopyrite oxidation, offering a sustainable strategy for arsenic removal with reduced reagent consumption.
研究领域:
环境化学
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矿物加工
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冶金工程
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表面科学
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电化学
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自由基化学
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硫化物矿物氧化
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 19
·1-8
·
IF 2.8
Yan Shuai,Hu Wencai,Wang Sen,Liu Gaobin
In this paper, Sr-doped BaTiO 3 nanoparticles were synthesized via electrochemical method, leading to the successful preparation of Ba 0.67 Sr 0.33 TiO 3 (BST) powders. The phase composition and microstructure of the powders were characterized using X-ray diffraction small angle X-ray scattering, scanning electron microscopy (SEM), and transmission electron microscopy. The results show that the average grain size of the nanoparticles is in the range of 10–20 nm, and the particles with good crystallinity are obtained under the environment of 3 mol.L −1 NaOH concentration. Sintering at 1250 ℃ for 3 h yields nanoscale BST ceramics with a dense structure and an average grain size of about 300 nm. These fine-grained ceramic samples exhibit superior temperature stability compared to relatively coarser BST ceramics. Furthermore, due to their nanoscale grain size, extensive phase transitions result in a low dielectric constant as observed from the dielectric property data. This work presents a novel approach for preparing nanoscale powders and homogeneous ceramics applicable in various electronic applications.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
CHINESE JOURNAL OF PHYSICS
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2017
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IF 0.514
Yanchun Hu,Yuting Wei,Xianwei Wang,Weixia Li,Yawen Cui,Liuju Zhang
Cation-doped (Sr 2–3x Gd x Ba 2x ) FeMoO 6 ( x = 0.00, 0.05, 0.10, 0.20, 0.25) compounds were synthesized via a standard high-temperature solid-state reaction. The crystal structure and magnetic properties of these samples were analyzed. X-ray powder diffraction analysis showed that all samples are single phase and belong to the I4/m space group. The order degree of Fe/Mo decreased from 91.72% to 83.22%. Magnetic measurements showed that all samples underwent paramagnetic to ferromagnetic (FM) phase transition near the Curie temperature (T C ). The main reason for T C reduction could be antisite defect detected by establishing the derivative dM / dT . All samples exhibited FM characteristics by detecting the hysteresis loops of (Sr 2–3x Gd x Ba 2x ) FeMoO 6 at 5 K. The configuration scheme of the unit moment for (Sr 2–3x Gd x Ba 2x ) FeMoO 6 can be deduced by magnetic measurement.
研究领域:
材料科学
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凝聚态物理
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磁学
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固态化学
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 2
·441-448
·
IF 0.64
Xiong Yan,Zhang Yucheng,Liu Wei,Liu Yang,Tan Junjun
A citrate-assisted hydrothermal method was utilized for the preparation of Sr-substituted hydroxyapatite (HA) nanoparticles. The influences of Sr-substituting degree on the phase identifications, microstructures and colloidal stability of the resultant products were studied. The experimental results show that the crystalline structures and morphologies of final resultants are significantly changed by controlling the Sr-substituting degree. As the Sr-substituting degree increases, the colloidal stability of samples first increases and then decreases rapidly; the morphology of the product first changes from nanorods to short nanorods rod and then becomes nanowires. Uniform HA hexagonal nanorods with high aspect ratio (>4.0) and excellent aqueous colloidal stability were prepared by 6 h hydrothermal reaction at 180 °C without Sr substitution. The dispersion underwent the phase transition from isotropic to liquid-crystalline state upon the increasing concentration of 25wt% and the complete liquid-crystalline phase was achieved when at the concentration above 31wt%. These novel findings provide new insights into the role of Sr substitution on both the citrate-assisted hydroxyapatite crystallization and tailoring of colloidal stability. Moreover, HA liquid crystal behavior was successfully observed, which lays a foundation for the fabrication of macroscopically assembled hydroxyapatite-based biomimetic materials for biomedical applications.
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2019
·
IF 2.6
Wei Zhao,Kunfeng Li,Peng Lin,Kai Xu,Shengheng Tan
Some particular hazardous and nuclear wastes containing a large amount of chlorine would cause the problematic processing during the waste vitrification, because of the low solubility of Cl in silicate glasses . Although a few works reported the chlorine behavior in aluminosilicate glasses, the results do not always show the consistency and a small variation of glass compositions may cause the significant changes. The present work studied the dissolution of Cl in the range of alkaline earth aluminosilicate glasses with the nominal mole composition of 50SiO 2 -10Al 2 O 3 -40AeO (Ae = Ca, Sr or Ba). The solubility of Cl in the glasses with different alkaline earth species followed the order of Ca (~8.1 wt%) > Sr (~6.0 wt%) > Ba (~3.5 wt%). The glass density and glass transition temperature decreased with the addition of Cl in three types of glasses, and AeCl 2 salts, identified with X-ray diffraction, segregated from the glasses, when Cl addition exceeds its solubility. Raman spectra indicate the dissolution of Cl leads to the increase of bridged oxygen bonds in glasses, supposing that Ca 2+ ions are attracted by Cl − ions, leaving the non-bridging oxygens that initially associated with Ca 2+ ions are bonded to Si 4+ (Al 3+ ) to become bridging oxygens.
研究领域:
材料科学
·
核废料处理
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产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Bo Gu,Xinghua Zhu,Guohong Pu,Fangfang He,Peng Wang,Guansong He,Ren He,Kai Zhang,Wenbin Yang
In this work, anilino-methyl-triethoxysilane (AMTS) was used as a modifier to secondary modified carbon fiber (CF). Firstly, the CF was pretreated by immersing it in a dopamine (DA) solution so that a certain amount of polydopamine (PDA) particles were attached to its surface to obtain modified carbon fiber (m-CF). Next, m-CF was immersed in a solution of ethanol with AMTS. m-CF@AMTS was obtained by hydrolytic bonding of AMTS to the surface of m-CF. Finally, a silicone rubber/carbon fiber composite (SR/m-CF@AMTS) was prepared from m-CF@AMTS and silicone rubber (SR) matrix. Meanwhile, γ-Aminopropyltriethoxysilane (KH550), 3-Glycidoxypropyltrimethoxysilane (KH560), and 3-(Trimethoxysily)proply methacrylate (KH570) were used as controls for the AMTS secondary modified carbon fiber. The resultant of transverse fiber bundle tests (TFBT) shows that the SR/m-CF@AMTS compared with untreated silicone rubber/carbon fiber (SR/CF) and dopamine (DA) modified silicone rubber/carbon fiber (SR/m-CF) composites, the TFBT strength of SR/m-CF@AMTS was improved by 135.5 % and 51.6 %, and the elongation at break was improved by 177.9 % and 63.8 %, respectively. The above results show that secondary modification of CF by AMTS is a successful and efficient method. Secondary modification of CF by AMTS was first proposed and applied to the experiment.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2023
·Vol. 70
·期 9
·1773-1783
·
IF 1.8
Lanhe Zhang,Sen Wang,Junqi Wang,Hong Jiang,Qiang Liu,Xin Cheng,Xiaohui Xu
Objective A novel fluorescent composite anti-corrosion coating was prepared, which could simultaneously indicate corrosion sites and corrosion degree according to change of fluorescence intensity. Methods Tri-HDI/GO/SR/AP coating was prepared by blending method. Its structure, physical properties, anti-corrosion ability and fluorescence intensity were analyzed. Results Tri-HDI/GO/SR/AP coating was not significantly damaged during the corrosion simulation experiment. The fluorescence intensity of the coating decreased with the increase of corrosion degree. Conclusions Based on structure characterization and electrochemical analysis, it is found that Tri-HDI/GO/SR/AP coating has positive anti-corrosion performance. Fluorescence molecules undergo a quenching reaction when corrosion occurs, the corrosion location and corrosion degree can be determined according to the changes of luminescence intensity.
研究领域:
材料科学
·
腐蚀工程
·
涂层技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）