Ceramics International最新文献_第2页

Effect of ZrO2 content on the structure and alkali resistance of glass fibers prepared from red mud ZrO2含量对赤泥玻璃纤维结构和耐碱性能的影响

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.226

Longjun Wang , Zisheng Chen , Wenkai Gao , Junbo Si , Jinchang Li , Xianzhuo Dong , Hang Chen , Yu Tang , Yongyan Li , Yunlong Yue , Junfeng Kang

{"title":"Effect of ZrO2 content on the structure and alkali resistance of glass fibers prepared from red mud","authors":"Longjun Wang , Zisheng Chen , Wenkai Gao , Junbo Si , Jinchang Li , Xianzhuo Dong , Hang Chen , Yu Tang , Yongyan Li , Yunlong Yue , Junfeng Kang","doi":"10.1016/j.ceramint.2025.02.226","DOIUrl":"10.1016/j.ceramint.2025.02.226","url":null,"abstract":"<div><div>Glass fibers are manufactured using red mud as the primary raw material. The effect of ZrO<sub>2</sub> content on the glass network structure, tensile strength, and alkali resistance of the glass fibers was examined. The results indicated that the degree of polymerization of the glass network exhibited an initial increase followed by a decrease with rising ZrO<sub>2</sub> content. The change in glass network structure causes a change in tensile strength, as the ZrO<sub>2</sub> content increased to 1.0 wt%, the tensile strength reached the maximum of 1927 ± 34 MPa. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) analyses revealed that, with the appropriate addition of ZrO<sub>2</sub>, the Zr<sup>4+</sup> participates in the construction of glass network, using Zr<sup>4+</sup> ions as anchor points to form a protective shell on the surface of glass fibers in an erosive environment significantly enhances the corrosion resistance of glass fibers.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20595-20602"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lattice constraint induced Cr4+ selective substitution for broadband NIR-Ⅱ emitting in composition detection application 晶格约束诱导Cr4+选择性取代宽带近红外-Ⅱ发射在成分检测中的应用

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.228

Yang Xu , Bin Sun , Meng Zhang , Jingyao Ma , Pengpeng Dai , Nan Yang

{"title":"Lattice constraint induced Cr4+ selective substitution for broadband NIR-Ⅱ emitting in composition detection application","authors":"Yang Xu , Bin Sun , Meng Zhang , Jingyao Ma , Pengpeng Dai , Nan Yang","doi":"10.1016/j.ceramint.2025.02.228","DOIUrl":"10.1016/j.ceramint.2025.02.228","url":null,"abstract":"<div><div>Cr<sup>4+</sup>-activated broadband near-infrared-II (NIR-II) phosphors significantly influence composition analysis and nondestructive testing of materials. However, the multivalent Cr ions, with valences +3 and + 4, hinder the advancement of Cr<sup>4+</sup>-activated NIR-II phosphors. Herein, we used a cation-size-mismatch strategy to engineer the site occupancy of Cr ions and successfully synthesized a series of Cr<sup>4+</sup>-activated CaGdGaO<sub>4</sub> (CGG) phosphors <em>via</em> a solid-state reaction. The valence state and site occupation preference of Cr ions are investigated in detail through XRD, Rietveld refinements and XPS techniques. Under excitation at 625nm, a broadband NIR-II emission covering the wavelength range of 1100–1600 nm could be achieved in the CGG<sub>0.97</sub>:3%Cr<sup>4+</sup> phosphor, with a full width at half maximum (FWHM) of 230 nm. The excitation and emission spectra recorded at a low temperature (5 K) confirmed the broadband NIR-II emission from a single Cr<sup>4+</sup> occupying the tetrahedral GaO<sub>4</sub> units in the CGG phosphors. Benefitting from broadband NIR-II emission, utilizing the transmission spectrum of as-prepared CGG<sub>0.97</sub>:3%Cr<sup>4+</sup> phosphor, we demonstrate that its potential applications in qualitative and quantitative non-destructive testing of water, ethanol, and sunflower oil.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20612-20619"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing of new halide perovskite based on Rb & Be for advanced applications: DFT-calculations 基于Rb和Be的新型高级应用卤化物钙钛矿设计：dft计算

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.243

Shahzad Naseem , Robina Ashraf , Nidhal Drissi , Nadia Anwar , Muqarrab Ahmed , Dilbar Khan , Syed Ahmad Raza Zaidi , Naveed A. Noor , Muhammad Imran , Saira Riaz , Phuong V. Pham

{"title":"Designing of new halide perovskite based on Rb & Be for advanced applications: DFT-calculations","authors":"Shahzad Naseem , Robina Ashraf , Nidhal Drissi , Nadia Anwar , Muqarrab Ahmed , Dilbar Khan , Syed Ahmad Raza Zaidi , Naveed A. Noor , Muhammad Imran , Saira Riaz , Phuong V. Pham","doi":"10.1016/j.ceramint.2025.02.243","DOIUrl":"10.1016/j.ceramint.2025.02.243","url":null,"abstract":"<div><div>Optoelectronic, mechanical, and thermoelectric characteristics of the material halide perovskite RbBeX<sub>3</sub> (X = Cl, Br, I) are theoretically investigated in the current work. The structural and elastic properties of mentioned materials are examined using the generalized gradient approximation (PBEsol), whereas electronic and thermoelectric properties are better understood using the modified Becke-Johnson (mBJ) functional technique<strong>.</strong> Born Criteria along with energy of formation have been examined for stability of all of these halide perovskite variations. The elastic constants of the cubic symmetry are investigated to ascertain anisotropy, Debye temperatures, and the distinction between brittle and ductile nature. Based on the mBJ potential, the bandgaps for RbBeCl<sub>3</sub>, RbBeBr<sub>3</sub>, and RbBeI<sub>3</sub> are 3.8 eV, 2.1 eV, and 0.45 eV, respectively. To confirm the optical properties inside the visible region, all of these halide perovskites are further analyzed for their properties such as absorption, refractive index, and dielectric constants in the energy range 0–14eV. Furthermore, because of their lower values thermal conductivity, larger values of Seebeck coefficient, and Figure of merit (ZT), these halide perovskites are also suitable candidates for thermoelectric applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20765-20775"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical bond parameters and microwave dielectric properties of CaLaAl3O7 ceramics with layer structure 层状结构CaLaAl3O7陶瓷的化学键参数及微波介电性能

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.247

Hongcheng Yang , Xier Huang , Yixuan Zheng , Jin Zhang , Enzhu Li

{"title":"Chemical bond parameters and microwave dielectric properties of CaLaAl3O7 ceramics with layer structure","authors":"Hongcheng Yang , Xier Huang , Yixuan Zheng , Jin Zhang , Enzhu Li","doi":"10.1016/j.ceramint.2025.02.247","DOIUrl":"10.1016/j.ceramint.2025.02.247","url":null,"abstract":"<div><div>Sintered at 1575 °C, the single phase CaLaAl<sub>3</sub>O<sub>7</sub> ceramics were obtained and investigated on the sensitivity of chemical bond to the stability of layer structure. LaAlO<sub>3</sub> and CaAl<sub>2</sub>O<sub>4</sub> are the secondary phases in the sintering temperature range of 1350∼1550 °C, contributing to the variation of relative density, dielectric constant and quality factors. As a candidate of microwave dielectric ceramics of aluminate, pure CaLaAl<sub>3</sub>O<sub>7</sub> possesses the microwave dielectric properties of ɛ<sub>r</sub> = 6.26, Q × f = 22750 GHz, τ<sub>f</sub> = −39.8 ppm/°C. Based on the calculation of chemical bond traits and cation polarization, modification of Ca/La site may have primary influence on ɛ<sub>r</sub>. Al(1)-O and Al(2)-O bonds make mainly contribution on lattice energy and bond energy, indicating [AlO4] frame paly crucial role on crystal structure stability. It is prior to design substitution for Al to adjust the layer structure and optimize the dielectric loss for CaLaAl<sub>3</sub>O<sub>7</sub> ceramics. The systematical results of this study establish that determination of contributions of chemical bond to structure stability is a key dial for tuning crystal structure and properties in ternary aluminate solids.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20798-20804"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, magnetic, DC resistivity and dielectric properties of Ni-doped strontium hexaferrites SrNixFe12-xO19 ni掺杂锶六铁体SrNixFe12-xO19的结构、磁性、直流电阻率和介电性能

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.182

D. Parajuli , N. Murali , K. Samatha

{"title":"Structural, magnetic, DC resistivity and dielectric properties of Ni-doped strontium hexaferrites SrNixFe12-xO19","authors":"D. Parajuli , N. Murali , K. Samatha","doi":"10.1016/j.ceramint.2025.02.182","DOIUrl":"10.1016/j.ceramint.2025.02.182","url":null,"abstract":"<div><div>Nickel-doped strontium hexaferrites, SrNi<sub><em>x</em></sub>Fe<sub>12-<em>x</em></sub>O<sub>19</sub> (<em>x</em> = 0.00, 0.03, 0.06, 0.09, 0.12), were synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis confirmed the formation of an M-type hexagonal structure (<em>P</em>6<sub>3</sub>/<em>mmc</em>, JCPDS card no: 33–1340), with secondary phases (α-Fe<sub>2</sub>O<sub>3</sub> and NiFe<sub>2</sub>O<sub>4</sub>) emerging at higher Ni concentrations (<em>x</em> ≥ 0.06). Lattice parameters and X-ray density were found to increase with Ni substitution. Pure hexaferrite phases were maintained for <em>x</em> ≤ 0.03, while additional phases appeared for <em>x</em> > 0.03. Scanning electron microscopy (SEM) revealed well-defined hexagonal plate-like grains, with a minimum grain size of 675.65 nm observed at <em>x</em> = 0.06. Magnetic characterization showed a decrease in saturation magnetization (M<sub>s</sub>), remanence (M<sub>r</sub>), and coercivity (H<sub>c</sub>), with the lowest values of 46.89 emu/g, 28.22 emu/g, and 3673.88 Oe, respectively, at <em>x</em> = 0.06. The samples exhibited single-domain behavior with remanence ratios (M<sub>r</sub>/M<sub>s</sub>) ranging between 0.6018 and 0.6966. DC resistivity measurements indicated semiconducting behavior, with resistivity increasing as temperature decreased. The dielectric constant and loss factor decreased with increasing Ni content, the electric modulus, and impedance analysis suggesting a non-Debye type of relaxation with suitability for high-frequency applications. These findings demonstrate that Ni-doped strontium hexaferrites possess tunable structural, magnetic, and dielectric properties, making them promising candidates for use in high-frequency, low-loss devices such as capacitors, filters, and energy storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20143-20163"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and strategy of Al2O3-MgO castables with high thermal-mechanical stability and insulation ability 具有高热机械稳定性和保温性能的Al2O3-MgO浇注料的研制与策略

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.249

Yu Liu , Lin Yuan , Juntao Wang , Nana Xu

{"title":"Development and strategy of Al2O3-MgO castables with high thermal-mechanical stability and insulation ability","authors":"Yu Liu , Lin Yuan , Juntao Wang , Nana Xu","doi":"10.1016/j.ceramint.2025.02.249","DOIUrl":"10.1016/j.ceramint.2025.02.249","url":null,"abstract":"<div><div>In this study, alumina bubbles and micro-pore-forming agents were used for the lightweight design of Al<sub>2</sub>O<sub>3</sub>-MgO castables. The microstructure, phase composition, and physical properties of the castables were analyzed. The results show that the addition of two pore-forming materials could improve the thermal insulation performance and thermal shock stability of the castables. The micro-pore-forming agent modified castable exhibits superior mechanical properties and a minimum thermal conductivity of 0.203 W/(m·K) under the testing temperature of 1000 °C. The appropriate porous structure helps the castable to maintain a certain mechanical strength, reduce its thermal conductivity, disperse thermal stress, and improve the thermal shock resistance. Meanwhile, the multi-channel capillary force from evenly distributed micro-pores could delay the penetration and diffusion of slag. However, the excessive addition of pore-forming materials leads to exorbitant porosity with poor pore structure and distribution uniformity due to the floating of alumina bubbles and the merging of pores, resulting in deleterious effects on the mechanical, thermal, and service properties of the castables. This study contributes to expanding the design and development of Al<sub>2</sub>O<sub>3</sub>-MgO castable and extending its service life, as well as reducing energy consumption.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20805-20812"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of high-performance phosphate glasses and their applications in all-solid-state electrochromic devices 高性能磷酸盐玻璃的制备及其在全固态电致变色器件中的应用

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.221

Chaoqun Hou , Yang Ren , Zexuan Luo , Jianing Li , Danni Dang , Yutong Song , Haiyan He , Yunwei Wang , Qilin Tang

{"title":"Preparation of high-performance phosphate glasses and their applications in all-solid-state electrochromic devices","authors":"Chaoqun Hou , Yang Ren , Zexuan Luo , Jianing Li , Danni Dang , Yutong Song , Haiyan He , Yunwei Wang , Qilin Tang","doi":"10.1016/j.ceramint.2025.02.221","DOIUrl":"10.1016/j.ceramint.2025.02.221","url":null,"abstract":"<div><div>In this paper, phosphate glasses with different Li<sup>+</sup> concentrations (45.5+x)LiO<sub>1/2</sub>-3.25AlO<sub>3/2</sub>-(51.25-x)PO<sub>5/2</sub> (x = 0, 2.5, 5, 7.5, 10, 11, and 12.5) were prepared by melt quenching metho,and the effects of Li<sup>+</sup> concentration on the structure, chemical composition, optical and ionic conductivity of phosphate glasses were studied. The results demonstrate that the optical and ionic conductive of phosphate glasses can be modulated through microstructural alternations induced by varying concentrations of Li<sup>+</sup> concentration. When x = 7.5, the light transmittance of the prepared phosphate glass is as high as 95 % in the visible region, and the ionic conductivity is 10<sup>−5</sup> S/cm at room temperature. In addition, this paper abandons the traditional method of constructing all-solid-state electrochromic devices (ECDs) using soda-lime glass as the substrate. Instead, it employs pulsed laser deposition (PLD) technology, using phosphate glass as the electrolyte, to deposit tungsten trioxide (WO<sub>3</sub>)/indium tin oxide (ITO) films and nickel monoxide (NiO)/ITO films on either side, respectively, thereby fabricating an all-solid-state ECD without a conventional glass substrate. This ECD exhibits excellent electrochromic performance: The optical modulation amplitude (<em>ΔT</em>) is 61.14 %; the transmittance in the bleached state reaches 86 %; after 10,000 cycles, <em>ΔT</em> remains stable at approximately 54.2 %.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20532-20540"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion characteristics and mechanisms of ceramic coatings in subcritical and supercritical aqueous systems 陶瓷涂层在亚临界和超临界水溶液体系中的腐蚀特性和机理

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.258

Yanhui Li , Qibo Wang , Wang Zhu , Shaoming Ding , Limei Xing , Zhouyang Bai , Yongzhen Wang

{"title":"Corrosion characteristics and mechanisms of ceramic coatings in subcritical and supercritical aqueous systems","authors":"Yanhui Li , Qibo Wang , Wang Zhu , Shaoming Ding , Limei Xing , Zhouyang Bai , Yongzhen Wang","doi":"10.1016/j.ceramint.2025.02.258","DOIUrl":"10.1016/j.ceramint.2025.02.258","url":null,"abstract":"<div><div>Ceramic coatings have emerged as a critical solution for combating severe degradation in sub/supercritical water (SCW) systems, integral to sustainable energy and waste management technologies. This paper investigates the corrosion resistance, failure mechanisms, and optimization strategies of various ceramic coatings, including oxide ceramics (Al<sub>2</sub>O<sub>3</sub>, ZrO<sub>2</sub>, Cr<sub>2</sub>O<sub>3</sub>) and non-oxide ceramics. Comprehensive analyses reveal that grain boundary dissolution, phase transformations, and porosity-induced degradation are the primary drivers of coating failure under SCW conditions. The effectiveness of stabilizers such as Y<sub>2</sub>O<sub>3</sub> and CeO<sub>2</sub> in improving phase stability and corrosion resistance is evaluated alongside advanced deposition techniques like electron beam physical vapor deposition (EB-PVD) for achieving dense, heat cycle-resistant coatings. Additionally, novel hybrid and multilayer designs are proposed to address thermal mismatch and stress-induced failures. This paper provides critical insights into material design and application strategies, contributing to developing durable ceramic coatings for sustainable industrial applications in extreme environments.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 19743-19760"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of O2 doping on the dielectric properties of the SrTiO3 ceramics O2掺杂对SrTiO3陶瓷介电性能的影响

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.227

Tong Guo , Wei Bai , Kai Feng , Chuangchuang He , Jinbiao Pang , Qiang Xie , Changping Yang

{"title":"Effect of O2 doping on the dielectric properties of the SrTiO3 ceramics","authors":"Tong Guo , Wei Bai , Kai Feng , Chuangchuang He , Jinbiao Pang , Qiang Xie , Changping Yang","doi":"10.1016/j.ceramint.2025.02.227","DOIUrl":"10.1016/j.ceramint.2025.02.227","url":null,"abstract":"<div><div>The effect of doping O<sub>2</sub> on the dielectric properties of the SrTiO<sub>3</sub> (STO) ceramics was investigated in this work. Both semi-conductive and insulating STO ceramic samples were prepared using a two-step sintering method together with the tape casting technique. The structure and dielectric polarization properties of doping O<sub>2</sub> on STO ceramics were studied by XRD, XPS, SEM, TEM, AC and DC electrical measurements. The experimental results indicate that: (1) When the temperature is below 900 °C, O<sub>2</sub> cannot diffuse into the semi-conductive STO sample. However, when the temperature exceeds 1000 °C, O<sub>2</sub> begins to penetrate through STO and the concentration of O<sub>2</sub> increases with increasing temperatures; (2) O<sub>2</sub> doping primarily occurs through grain boundaries rather than grain interiors. After doping with O<sub>2</sub>, the grain boundary resistance of STO increases, while the capacitance decreases rapidly. However, the grain resistance remains almost unchanged; (3) The diffusion of O<sub>2</sub> has little effect on the change of grain resistance. On the contrary, as the grain boundary width increases with temperature, O<sub>2</sub> diffusion can significantly reduce the capacitance of STO ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20603-20611"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphologically controlled tuning of structural, magnetic and impedance properties of iron titanate (FeTiO3) for multilayered structures 多层结构中钛酸铁（FeTiO3）的结构、磁性和阻抗特性的形态学调控

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-06-01 DOI: 10.1016/j.ceramint.2025.02.208

Faiza Arshad , Attia Awan , Muqarrab Ahmed , Nadia Anwar , Y.B. Xu , Shahzad Naseem , Wen-Cheng Lai , Saira Riaz

{"title":"Morphologically controlled tuning of structural, magnetic and impedance properties of iron titanate (FeTiO3) for multilayered structures","authors":"Faiza Arshad , Attia Awan , Muqarrab Ahmed , Nadia Anwar , Y.B. Xu , Shahzad Naseem , Wen-Cheng Lai , Saira Riaz","doi":"10.1016/j.ceramint.2025.02.208","DOIUrl":"10.1016/j.ceramint.2025.02.208","url":null,"abstract":"<div><div>Nanoneedles-based thin films of iron titanate (FeTiO<sub>3</sub>) are prepared using the electrodeposition technique with the electrolyte molarity varied from 0.01M to 0.1M. Mixed phases i.e. FeTiO<sub>3</sub> and TiO<sub>2</sub> are observed at low molarities. While FeTiO<sub>3</sub> phase is observed at rest of molarities. Nanoneedles with diameters of ∼50 nm are observed using scanning electron microscopy for 0.08M–0.1M. DFT calculations of FeTiO<sub>3</sub> (<em>R</em>3<em>c</em>, 161) are performed using the WIEN2K code with GGA-PBEsol. Dielectric analysis shows normal dispersion behavior of electrodeposited iron titanate thin films. A high value of dielectric constant is observed for the samples prepared with relatively high molarity values. Iron titanate thin films exhibit saturated ferromagnetic MH curves at higher molarities. Work function and magnetic field dependent saturation and resistivity suggest the potential use of the studied material in advanced electronic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20403-20422"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0