检索结果-南通市图书馆

同方期刊数据库

Co-substitution of carbonate and fluoride in hydroxyapatite： Effect on substitution type and content

在线全文

学校读者我要写书评

暂无评论

Frontiers of materials science 2015年第2期9卷 192-198页

作者： Qing-xia ZHU Ya-Ming LI Dan HAN school of materials science and engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

The nanosized hydroxyapatite substituted by fluoride and carbonate ions （CFHA） had been synthesized by aqueous precipitation method. CFHA had been considered as potential bone graft material for orthopedic and dental applications. The objective of this study was to determine the effects of simultaneously incorporated CO2/3- and F- on the substitution type and content. The morphologies of CFHAs were observed by TEM. The carbonate substitution type and content were characterized by FTIR. The fluoride contents were determined by F-selective electrode. The phase compositions and crystallinity of the samples were investigated by XRD. The fluoride and carbonate contents of CFHA increase with the dopant concentrations nonlinearly, The carbonate substitution has much more obvious effect on morphology compared with the fluoride substitution. The co-existence of CO2/3-and F- ions can influence the corresponding substitution fraction. The isomorphic substitution of sodium for calcium in the substitution process of CO2/3-can improve crystal degree and favor the B-type substitutions. Due to the closeness of the ion radii and equivalent substitution of F- and OH-, F- will occupy the OH- sites of HA crystals more easily, compelling most of the CO2/3- to be located in the B sites.

关键词： hydroxyapatite co-substitution carbonate fluoride substitution type substitution content

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan Zhang Xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing Zhang Yongzheng Zhang Yunjian Liu Hongzhen Lin school of materials science and engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz institute Ulm (HIU) Karlsruhe institute of Technology (KIT) school of materials science and engineering Xi'an University of Technology State Key Laboratory of Chemical engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

Effects of Cr2O3 doping on the microstructure and electrical properties of （Ba,Ca）（Zr,Ti）O3 lead-free ceramics

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of materials science 2016年第2期10卷 203-210页

作者： Xiang XlA Xiangping JIANG Chao CHEN Xingan JIANG Na TU Yunjing CHEN Jiangxi Key Laboratory of Advanced ceramic materials School of Materials Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Lead-free ceramics （Ba0.85Ca0.15）（Zr0.1Ti0.9）O3-x wt,%Cr2O3 （BCZT-xCr） were prepared via the conventional solid-state reaction method. The microstructure and electrical properties of BCZT-xCr samples were systematically studied. XRD and Raman results showed that all samples possessed a single phased perovskite structure and were close to the morphotropic phase boundary （MPB）. With the increase of the Cr content, the rhombohedral-tetragonal phase transition temperature （TR-T） increases slightly, and the Curie temperature （Tc） shifts towards the low temperature side. XPS analysis reveals that Cr3. and Cr5＊ ions co-existed in Cr-doped BCZT ceramics, indicating the different impact on the electrical properties from Cr ions as ＂acceptor＂ or ＂donor＂. For the x = 0.1 sample, relative high piezoelectric constants d33 （-316 pC/N） as well as high Qm （-554） and low tan6 （-0.8%） were obtained. In addition, the AC conductivity was also investigated. Hopping charge was considered as the main conduction mechanism at low temperature. As the temperature increases, small polarons and oxygen vacancies conduction played important roles.

关键词： lead-free ceramics electrical properties BCZT XPS analysis

维普期刊数据库

Photoluminescence and electrical properties of Eu^3＋-doped Na0.5Bi4.5Ti4O15-based ferroelectrics under blue light excitation

在线全文

学校读者我要写书评

暂无评论

Frontiers of materials science 2016年第1期10卷 31-37页

作者： Xing-an JIANG Xiang-ping JIANG Chao CHEN NaTU Yun-jing CHEN Ban-chao ZHANG Jiangxi Key Laboratory of Advanced ceramic materials Department of Materials Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Na0.5Bi4.5-xEuxTi4O15 （NBT-xEu^3＋） ceramics with x= 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30 and 0.40 were prepared by conventional ceramics processing. NBT-0.25Eu^3＋ ceramics show the strongest red and orange emissions corresponding to the 5D0 → 7F2 （617 nm） and 5D0→ 7F1 （596 nm） transitions, respectively. The strongest excitation band around 465 nm matches well with the emission wavelength of commercial InGaN-based blue LED chip, indicating that Eu^3＋-doped NBT ceramics may be used as potential environmental friendly red-orange phosphor for W-LEDs application. As an inherent ferroelectric and piezoelectric material, the electrical properties of this potentially multifunctional electro-optical material have been also studied. The introduction of Eu^3＋ distinctly increased the Curie temperature （Tc） of NBT-xEu^3＋ ceramics from 640℃ to 711℃ as x ranges from 0 to 0.40. For higher temperature applications, the electrical conductivity was also investigated. The conduction of charge carriers in hightemperature range originates from the conducting electrons from the ionization of oxygen vacancies. High Tc and low tanδ makes Eu^3＋-doped NBT ceramic also suitable for high temperature piezoelectric sensor applications and electro-optical integration.

关键词： Aurivillius bismuth layered structure photoluminescence electricalproperties multifunctional materials

维普期刊数据库

Unlocking the stable interface in aqueous zinc-ion battery with multifunctional xylose-based electrolyte additives

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 770-778页

作者： Xiaoqin Li Jian Xiang Lu Qiu Xiaohan Chen Yinkun Zhao Yujue Wang Qu Yue Taotao Gao Wenlong Liu Dan Xiao Zhaoyu Jin Panpan Li institute for Advanced Study Chengdu University school of Mechanical engineering Chengdu University College of Food and Biological engineering Chengdu University institute of Fundamental and Frontier sciences University of Electronic Science and Technology of China College of materials science and engineering Sichuan University

The growth of dendrites and the side reactions occurring at the Zn anode pose significant challenges to the commercialization of aqueous Zn-ion batteries（AZIBs）. These challenges arise from the inherent conflict between mass transfer and electrochemical kinetics. In this study, we propose the use of a multifunctional electrolyte additive based on the xylose（Xylo） molecule to address these issues by modulating the solvation structure and electrode/electrolyte interface, thereby stabilizing the Zn anode. The introduction of the additive alters the solvation structure, creating steric hindrance that impedes charge transfer and then reduces electrochemical kinetics. Furthermore, in-situ analyses demonstrate that the reconstructed electrode/electrolyte interface facilitates stable and rapid Zn2+ion migration and suppresses corrosion and hydrogen evolution reactions. As a result, symmetric cells incorporating the Xylo additive exhibit significantly enhanced reversibility during the Zn plating/stripping process, with an impressively long lifespan of up to 1986 h, compared to cells using pure ZnSO4electrolyte. When combined with a polyaniline cathode, the full cells demonstrate improved capacity and long-term cyclic stability. This work offers an effective direction for improving the stability of Zn anode via electrolyte design, as well as highperformance AZIBs.

关键词： Solvation

LaNiO3 modified with Ag nanoparticles as an efficient bifunctional electrocatalyst for rechargeable zinc-air batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of materials science 2019年第3期13卷 277-287页

作者： Pengzhang Chuanjin TIAN Wei YANG Wenyan ZHAO Zhe LU Department of Physics Harbin Institute of TechnologyHarbin 150001China school of materials science and engineering Jingdezhen Ceramic InstituteJingdezhen 333001China school of Mechanical and Electronic engineering Jingdezhen Ceramic InstituteJingdezhen 333403China

No-precious bifunctional catalysts with high electrochemical activities and stability were crucial to properties of rechargeable zinc-air ***,LaNiO3 modified with Ag nanoparticles(Ag/LaNiO3)was prepared by the co-synthesis method and evaluated as the bifunctional oxygen catalyst for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Compared with LaNiO3,Ag/LaNiO3 demonstrated the enhanced catalytic activity towards ORR/OER as well as higher limited current density and lower onset ***,the potential gap between ORR potential(at-3 mA cm^-2)and OER potential(at 5 mA cm^-2)was 1.16 *** maximum power density of the primary zinc-air battery with Ag/LaNiO3 catalyst achieved 60 mW cm^-***,rechargeable zinc-air batteries operated reversible charge-discharge cycles for 150 cycles without noticeable performance deterioration,which showed its excellent bifunctional activity and cycling stability as oxygen electrocatalyst for rechargeable zinc-air *** results indicated that Ag/LaNiO3 prepared by the co-synthesis method was a promising bifunctional catalyst for rechargeable zinc-air batteries.

关键词： Ag/LaNiO3 co-synthesis method oxygen reduction reaction oxygen evolution reaction rechargeable zinc-air battery

Prediction of CO2 Solubility in Polymers by Radial Basis Function Artificial Neural Network Based on Chaotic Self-adaptive Particle Swarm Optimization and Fuzzy Clustering Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2013年第12期31卷 1564-1572页

作者： Yan Wu Bingxiang Liu Mengshan Li Kezong Tang Yubo Wu school of Information engineering Jingdezhen Ceramic Institute Jingdezhen Jiangxi 333001 China Research Center for Literary Theory & Aesthetics Jingdezhen Ceramic Institute Jingdezhen Jiangxi 333001 China

To replace costly and time-consuming experimentation in laboratory, a novel solubility prediction model based on chaos theory, self-adaptive particle swarm optimization （PSO）, fuzzy c-means clustering method, and radial ba- sis function artificial neural network （RBF ANN） is proposed to predict CO2 solubility in polymers, hereafter called CSPSO-FC RBF ANN. The premature convergence problem is overcome by modifying the conventional PSO using chaos theory and self-adaptive inertia weight factor. Fuzzy c-means clustering method is used to tune the hidden centers and radial basis function spreads. The modified PSO algorithm is employed to optimize the RBF ANN connection weights. Then, the proposed CSPSO-FC RBF ANN is used to investigate solubility of CO2 in polystyrene （PS）, polypropylene （PP）, poly（butylene succinate）（PBS） and poly（butylene succinate-co-adipate）（PBSA）, respec- tively. Results indicate that CSPSO-FC RBF ANN is an effective method for gas solubility in polymers. In addition, compared with conventional RBF ANN and PSO ANN, CSPSO-FC RBF ANN shows better performance. The values of average relative deviation （ARD）, squared correlation coefficient （R2） and standard deviation （SD） are 0.1071, 0.9973 and 0.0108, respectively. Statistical data demonstrate that CSPSO-FC RBF ANN has excellent prediction capability and high-accuracy, and the correlation between prediction values and experimental data is good.

关键词： solubility prediction polymers artificial neural network particle Swarm optimization computationalchemistry

Photoluminescence and electrical properties of Er3＋-dopedNa0.5Bi4.5Ti4O15-Bi4Ti3O12 inter-growth ferroelectric ceramics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of materials science 2017年第1期11卷 51-58页

作者： Yalin JIANG Xiangping JIANG Chao CHEN Yunjing CHEN Xingan JIANG Na TU Jiangxi Key Laboratory of Advanced ceramic materials Department of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Upconversion （UC） and electrical properties of Na0.5Bi8.5-xErxTi7O27 （NBT-BIT-xEr, 0.00≤x≤0.25） ceramics were studied. Structural analysis revealed that a single inter-growth structured phase exists in all samples and the Er3＋ ion substituting for Bi3＋ at the A-site increases the orthorhombic distortion. Under the 980 nm laser excitation, two characteristic green emission bands and one red emission band were situated at 527, 548 and 670 nm, corresponding to the transitions 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2, respectively. The optimal photoluminescence （PL） were found in the NBT-BIT-0.20Er sample, and the emission color transforms from green to yellowish green. Temperature dependence of fluorescence intensity ratio （FIR） for NBT-BIT-0.20Er was measured ranging from 290 to 440 K and its maximum sensitivity was calculated to be about 0.0020 K-1 at 290 K. Dielectric measurements indicated that Tc slightly increased simultaneously with the decrease of tanS. Therefore, this ceramic has potential applications for high-temperature multifunctional devices.

关键词： inter-growth structure photoluminescence (PL) electrical properties multifunctional materials

High performance Aurivillius type Na_(0.5)Bi_(4.5)Ti_(4)O_(15) piezoelectric ceramics with neodymium and cerium modification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced ceramics 2015年第1期4卷 54-60页

作者： Xiang-Ping JIANG Xiao-Long FU Chao CHEN Na TU Ming-Zhu XU Xiao-Hong LI Hong SHAO Yun-Jing CHEN Department of Material science and engineering Jiangxi Key Laboratory of Advanced Ceramic MaterialsJingdezhen Ceramic InstituteJingdezhen 333001JiangxiChina

Bismuth layer-structured ferroelectric ceramics of Na0.5Bi4.5-x(Nd_(0.5)Ce_(0.5)))xTi4O15(NBT-x,0.0≤x≤0.4)were synthesized by a traditional solid-state *** effect of(Nd,Ce)substitution for A-site on the microstructure and electrical properties of Na_(0.5)Bi_(4.5)Ti_(4)O_(15)(NBT)-based piezoelectric ceramics was investigated.X-ray diffraction(XRD)analysis revealed that the(Nd,Ce)-modified NBT ceramics have a pure four-layer Aurivillius type *** piezoelectric properties of NBT ceramics were significantly improved by the modification of neodymium and *** Curie temperature TC gradually decreased from 638℃to 618℃with increasing the(Nd,Ce)*** piezoelectric constant d33,mechanical quality factor Qm,dielectric loss tanδand Curie temperature TC of the Na0.5Bi4.3(Nd_(0.5)Ce_(0.5)))0.2Ti4O15 ceramic were found to be 28 pC/N,3239,0.0032 and 630℃,*** annealing studies indicated that the(Nd,Ce)-modified NBT ceramics possess stable piezoelectric properties,demonstrating that the Na0.5Bi4.3(Nd_(0.5)Ce_(0.5)))0.2Ti4O15 ceramic is a promising candidate for high temperature applications.

关键词： lead-free Na_(0.5)Bi_(4.5)Ti_(4)O_(15)(NBT)ceramics piezoelectric properties