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Effect of thermal annealing on the structural evolution of thin ceramic YAG: Ce films grown by pulsed laser deposition
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.047
Oleg V. Devitsky , Alexander A. Kravtsov
{"title":"Effect of thermal annealing on the structural evolution of thin ceramic YAG: Ce films grown by pulsed laser deposition","authors":"Oleg V. Devitsky ,&nbsp;Alexander A. Kravtsov","doi":"10.1016/j.ceramint.2024.12.047","DOIUrl":"10.1016/j.ceramint.2024.12.047","url":null,"abstract":"<div><div>It is well established that the performance of LED and laser devices can be enhanced by optimizing the heat sink. Aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) is one of the most effective materials for use as a heat sink. In this study, YAG: Ce<sup>3+</sup> thin films were deposited onto sapphire substrates with a (0001) orientation using pulsed laser deposition method. It was observed that the annealing temperature did not significantly affect the thickness of the films, but it did influence their uniformity and structure. As the annealing temperature of the YAG: Ce films increased, crystallite growth was noted. The polydispersity of the grains also increased with higher annealing temperatures, indicating competitive growth phenomena. Raising the annealing temperature to 1400 °C led to the formation of gaps in the film structure due to recrystallization processes. Luminescence measurements revealed that, despite the structural differences among films annealed at various temperatures, their emission spectra remained consistent with the target. This suggests the stability of the energy structure of YAG: Ce and the successful transfer of YAG stoichiometry during the pulsed laser deposition process. As a result, optimal conditions for the thermal annealing of YAG: Ce thin films were identified, leading to high crystalline perfection and the formation of a heteroepitaxial interface with the Al<sub>2</sub>O<sub>3</sub> (0001) substrate. This finding is potentially significant for enhancing the thermal characteristics of composite structures.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6011-6022"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323833","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
New functionalities of a bone cement by adding mechanochemically synthesized magnetic nanoparticles
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.079
Pedro A. Calderón Bedoya , Pablo M. Botta , María V. Álvarez , Paula G. Bercoff , Enio Lima , Roberto Zysler , María A. Fanovich
{"title":"New functionalities of a bone cement by adding mechanochemically synthesized magnetic nanoparticles","authors":"Pedro A. Calderón Bedoya ,&nbsp;Pablo M. Botta ,&nbsp;María V. Álvarez ,&nbsp;Paula G. Bercoff ,&nbsp;Enio Lima ,&nbsp;Roberto Zysler ,&nbsp;María A. Fanovich","doi":"10.1016/j.ceramint.2024.12.079","DOIUrl":"10.1016/j.ceramint.2024.12.079","url":null,"abstract":"<div><div>New formulations of calcium phosphate cements (CPCs) with magnetic properties have been developed. The CPC matrix was prepared from an equimolar mixture of tetracalcium phosphate (TTCP) and anhydrous calcium hydrogen phosphate (DCPA), using Na<sub>2</sub>HPO<sub>4</sub> solution as liquid phase. Naked and functionalized iron oxides nanoparticles (IONPs), were incorporated into the CPC solid phase and the effect of the different contents of IONPs on the initial and final setting times of the CPCs was investigated. Moreover, magnetic properties, antibacterial activity and magnetic hyperthermia response of these systems were evaluated. The results showed a clear influence of the IONPs in the setting process, with low conversion of hydroxyapatite (HA), especially for contents greater than 10 wt%. Magnetization values of 5.6 and 11.4 emu/g at the maximum applied field (13 kOe) for CPC with 10 and 20 wt% of IONPs respectively, were obtained. Magnetic hyperthermia of CPC with 10 wt% of IONPs showed a specific power absorption (SPA) of 0.22 (W/g). Similar values of SPA were obtained for cements with functionalized IONPs. Also, CPC with 10 wt% of functionalized IONPs with usnic acid showed antibacterial activity against <em>L. inoccua.</em> These data are promising, considering that the concentration of IONPs in the cement is only equivalent to 10 wt% of the material.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6330-6339"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143357473","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
Interaction of phenolic compounds with functionalized TiO2: Enhanced catechol adsorption and cooperative phenol adsorption
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.06.381
Filippo Parisi , Luciana Sciascia , Hiba Khlifi , Leila Elsellami , Davide Lenaz , Francesco Princivalle , Francesco Parrino
{"title":"Interaction of phenolic compounds with functionalized TiO2: Enhanced catechol adsorption and cooperative phenol adsorption","authors":"Filippo Parisi ,&nbsp;Luciana Sciascia ,&nbsp;Hiba Khlifi ,&nbsp;Leila Elsellami ,&nbsp;Davide Lenaz ,&nbsp;Francesco Princivalle ,&nbsp;Francesco Parrino","doi":"10.1016/j.ceramint.2024.06.381","DOIUrl":"10.1016/j.ceramint.2024.06.381","url":null,"abstract":"<div><div>A commercial TiO<sub>2</sub><span><span> sample functionalized with 3-aminopropyltrimethoxysilane (APTMS) and 4-carboxyphenylboronic acid (CPBA), has been previously proposed as a suitable photocatalyst to perform selective </span>photocatalytic degradation<span><span> of pollutants in aqueous streams, while avoiding the oxidation of valuable </span>catechol<span><span> simultaneously present in the reacting medium. In the present study, we highlight the adsorption mechanisms underlying the higher affinity of catechol, compared to </span>phenol, with the surface of modified TiO</span></span></span><sub>2</sub><span>, quantitatively justifying the photocatalytic selective degradation results previously obtained. Moreover, a cooperative adsorption mechanism of phenol onto the TiO</span><sub>2</sub><span> sample modified with APTMS has been for the first time observed. The resulting sigmoidal adsorption isotherms<span>, satisfactorily fitted with the Hill model, could be attributed to the enhanced surface hydrophobicity and, more importantly, to alterations of the folding of APTMS molecules on the TiO</span></span><sub>2</sub><span> surface occurring upon increasing the concentration of the phenolic compounds.</span></div><div><span>Photocatalytic tests revealed that the existence of boronate groups on the surface of TiO</span><sub>2</sub><span> hinders the photocatalytic degradation of catechol and facilitates a swifter oxidation of phenol. These findings confirm the potential for selective photocatalytic degradation, in line with modern conceptions of innovative and environmentally sustainable wastewater treatments.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5494-5504"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323488","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
Study on microstructure and properties of Cu-SnO2 composites prepared by in-situ supercritical water reaction method
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.013
Dan Qin, Tao Liu, Xiang Wang, Xuehui Zhang, Wenmin Zhao, Longfei Zeng
{"title":"Study on microstructure and properties of Cu-SnO2 composites prepared by in-situ supercritical water reaction method","authors":"Dan Qin,&nbsp;Tao Liu,&nbsp;Xiang Wang,&nbsp;Xuehui Zhang,&nbsp;Wenmin Zhao,&nbsp;Longfei Zeng","doi":"10.1016/j.ceramint.2024.12.013","DOIUrl":"10.1016/j.ceramint.2024.12.013","url":null,"abstract":"<div><div>In this study, Cu-SnO<sub>2</sub> composites are successfully prepared using supercritical water in-situ oxidation and powder metallurgy techniques. The results demonstrate that the Cu-4.5 wt% SnO<sub>2</sub> composite possessed excellent comprehensive performance. The tensile strength of the composite is 331 MPa, represents a 36.21 % increase compared to pure copper. The elongation is 43.21 %, and the hardness after treatment at 1000 °C is 87.26 HV, which is 85.76 % of the untreated hardness. These properties are attributed to the specific orientation relationship of SnO<sub>2</sub> with the Cu matrix {[<span><math><mrow><mn>1</mn><mover><mn>1</mn><mo>‾</mo></mover><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span>]<sub>SnO2</sub>//[<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover><mn>00</mn></mrow></math></span>]<sub>Cu</sub>, (<span><math><mrow><mn>12</mn><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span>)<sub>SnO2</sub>//(<span><math><mrow><mn>020</mn></mrow></math></span>)<sub>Cu</sub>}, with SnO<sub>2</sub> particles homogeneously dispersed in the composite.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5659-5669"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323541","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
The influence of sintering parameters and aluminum nitride powder characteristics on the microstructure and thermal conductivity of aluminum nitride ceramics
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.075
Zhiqiang Chen , Congmin Xu , Liang Wang , Panpan Du , Yingying Shi , Guoliang Xue , Zheng Wang , Chongbo Xie , Yunting Hou , Xiaolong Pan , Yusheng Zhang
{"title":"The influence of sintering parameters and aluminum nitride powder characteristics on the microstructure and thermal conductivity of aluminum nitride ceramics","authors":"Zhiqiang Chen ,&nbsp;Congmin Xu ,&nbsp;Liang Wang ,&nbsp;Panpan Du ,&nbsp;Yingying Shi ,&nbsp;Guoliang Xue ,&nbsp;Zheng Wang ,&nbsp;Chongbo Xie ,&nbsp;Yunting Hou ,&nbsp;Xiaolong Pan ,&nbsp;Yusheng Zhang","doi":"10.1016/j.ceramint.2024.12.075","DOIUrl":"10.1016/j.ceramint.2024.12.075","url":null,"abstract":"<div><div>Aluminum nitride (AlN) ceramics have been widely used as heat dissipation materials in integrated circuits and electronic devices. The characteristics of AlN powder and sintering process parameters play significant roles on the microstructure of AlN ceramics and further determine the thermal conductivity. Herein, AlN powders with different particle size were synthesized by subtly tuning the reaction conditions. Then the influence of sintering temperature, holding time, sintering additive amount on the microstructure and thermal conductivity of AlN ceramics were systematically studied. Finally, the powder characteristics on the property of AlN ceramics were compared. AlN powder with small particle size had high sintering activity and benefited the grain growth, but the oxygen content increased to produce more second phases, which affected the thermal conductivity. The thermal conductivity of ceramics is affected by lattice O, grain boundary, grain-boundary impurities, etc. A series of AlN ceramics with thermal conductivity &gt;200 W m⁻<sup>1</sup> K⁻<sup>1</sup> were prepared using self-made powder.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6300-6308"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323611","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
Dielectric and ferroelectric properties of bismuth sodium titanate-based high-entropy ferroelectrics for energy-storage applications
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.084
Jia Liu, Ruinan Liang, Furong Shang, Xing Zhao, Yuhang Bai, Xiao Liu, Huiling Du, Cuiying Ma
{"title":"Dielectric and ferroelectric properties of bismuth sodium titanate-based high-entropy ferroelectrics for energy-storage applications","authors":"Jia Liu,&nbsp;Ruinan Liang,&nbsp;Furong Shang,&nbsp;Xing Zhao,&nbsp;Yuhang Bai,&nbsp;Xiao Liu,&nbsp;Huiling Du,&nbsp;Cuiying Ma","doi":"10.1016/j.ceramint.2024.12.084","DOIUrl":"10.1016/j.ceramint.2024.12.084","url":null,"abstract":"<div><div>High-entropy ferroelectrics (HEFs) constitute a representative class of dielectrics with exceptional properties that play an indispensable role in the future of energy storage. Herein, bismuth sodium titanate (BNT)-based HEFs, namely (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.2</sub>Ca<sub>0.2</sub>Sr<sub>0.2</sub>Ba<sub>0.2</sub>La<sub>0.2</sub>TiO<sub>3</sub> (BNCSBL) ceramics, were successfully prepared via solid-state reaction method. Further, the phase structure, dielectric properties, ferroelectric properties, and energy storage characteristics of the as-prepared ceramics were systematically investigated. The BNCSBL ceramics exhibit a single-phase perovskite structure and a small grain size. A strong frequency dispersion is observed near the temperature at which the dielectric constant is maximum (<em>T</em><sub>m</sub>), demonstrating that the as-prepared ceramics exhibit relaxor ferroelectric behavior. Moreover, the large band gap (<em>E</em><sub>g</sub>) and low residual polarization (<em>P</em><sub>r</sub>) of the ceramics result in a high recoverable energy density (<em>W</em><sub>rec</sub> = 2.52 J/cm<sup>3</sup>) and energy-storage efficiency (<em>η</em> = 84 %) at an electric field of 340 kV/cm. Furthermore, these ceramics exhibit excellent frequency stability and fast charging–discharging speed (0.038 μs). These results indicate that BNCSBL ceramics are promising candidates for energy-storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6397-6405"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323636","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
Utilization of metallic foils to prevent carbon contamination in spark plasma sintered Y2O3
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.066
Joshua Gild , Lavina Backman , Adam Floyd , Bryan Sadowski , Woohong Kim , Shyam Bayya , Jasbinder Sanghera
{"title":"Utilization of metallic foils to prevent carbon contamination in spark plasma sintered Y2O3","authors":"Joshua Gild ,&nbsp;Lavina Backman ,&nbsp;Adam Floyd ,&nbsp;Bryan Sadowski ,&nbsp;Woohong Kim ,&nbsp;Shyam Bayya ,&nbsp;Jasbinder Sanghera","doi":"10.1016/j.ceramint.2024.12.066","DOIUrl":"10.1016/j.ceramint.2024.12.066","url":null,"abstract":"<div><div>Y<sub>2</sub>O<sub>3</sub> ceramic fabricated by Spark Plasma Sintering (SPS) has the potential to have fine grain sizes and rapid fabrication. Carbon contamination, however, is noted for oxide materials sintered via SPS due to the graphite tooling. In the present work, a variety of 25–50 μm thick metallic foils are utilized to prevent carbon contamination in the final specimen. The carbon contamination appeared as carboxylate absorption bands between 6 and 7 μm wavelength region. Ta foil was found to be superior to all other metals as a carbon blocker for improved transmission of the ceramic in both the visible and the infrared (IR). Inexpensive and thin foils of metals such as Ti and Zr proved suitable for IR transmission in materials where visible transmission is limited by structure or scattering from multiple phases such as 3YSZ or Y<sub>2</sub>O<sub>3</sub>-MgO composites.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6228-6232"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323801","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
Promising excitation-responsive phosphors CaxMgSi2Ox+5: Eu2+, Dy3+ with dual-mode luminescent centers for advanced anti-counterfeiting technology
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.11.372
Chi Zhang , Xu Han , Ruirui Cui , Yanzhi Zhang , Chaoyong Deng
{"title":"Promising excitation-responsive phosphors CaxMgSi2Ox+5: Eu2+, Dy3+ with dual-mode luminescent centers for advanced anti-counterfeiting technology","authors":"Chi Zhang ,&nbsp;Xu Han ,&nbsp;Ruirui Cui ,&nbsp;Yanzhi Zhang ,&nbsp;Chaoyong Deng","doi":"10.1016/j.ceramint.2024.11.372","DOIUrl":"10.1016/j.ceramint.2024.11.372","url":null,"abstract":"<div><div>Multi-mode luminescence typically produces tunable luminescent responses to different excitations. The formation of multi-mode luminescent centers in a single host is a promising research strategy that offers potential applications in the fields of multilayer advanced anti-counterfeiting technology and encryption technology. In this paper, we systematically studied the crystal structure, surface morphology, elemental composition, luminescence and afterglow properties of Ca<sub><em>x</em>-0.06</sub>MgSi<sub>2</sub>O<sub><em>x</em>+5</sub>: Eu<sup>2+</sup><sub>0.01</sub>, Dy<sup>3+</sup><sub>0.05</sub> (<em>x</em> = 1, 1.2, 1.6, 2) long afterglow phosphors. By continuously adjusting the composition of the Ca<sub><em>x</em></sub>MgSi<sub>2</sub>O<sub><em>x</em>+5</sub> host, dual-mode luminescent centers were successfully constructed within a single silicate host in Ca<sub><em>x</em>-0.06</sub>MgSi<sub>2</sub>O<sub><em>x</em>+5</sub>: Eu<sup>2+</sup><sub>0.01</sub>, Dy<sup>3+</sup><sub>0.05</sub> (<em>x</em> = 1.2 or 1.6) samples. These dual-mode luminescence phosphors exhibit distinct patterns of changes in the excitation spectra, while still overlapping in certain energy regions, which belongs to the excitation-responsive photoluminescence characteristic. The dynamic variations in luminescence colors of the static materials from near-white to blue light (<em>x</em> = 1.2) and from near-white to light yellow-green light (<em>x</em> = 1.6) were achieved in by excitation wavelength modulation. Their potential applications in the field of multilayered advanced anti-counterfeiting technology were demonstrated by constructing complex patterns. The afterglow emissions of the samples with <em>x</em> = 1 and 1.2 demonstrate a color transformation property over time, which may facilitate further exploration of their applications in information encryption. Additionally, an in-depth study of the electronic structures of the hosts Ca<sub>2</sub>MgSi<sub>2</sub>O<sub>7</sub> and CaMgSi<sub>2</sub>O<sub>6</sub>, along with the doped luminescent center Eu and the co-doped activator Dy, has been systematically investigated using first-principles calculations, which elucidates the reasons for the differences in photoluminescence and afterglow properties between the two crystal phases Ca<sub>2</sub>MgSi<sub>2</sub>O<sub>7</sub>: Eu<sup>2+</sup>, Dy<sup>3+</sup> and CaMgSi<sub>2</sub>O<sub>6</sub>: Eu<sup>2+</sup>, Dy<sup>3+</sup>. These results are of great value and significance for the research on designing multi-mode luminescence centers with color-controllable properties in a single host.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5597-5609"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143357468","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
Fabrication and electrochemical insights into advanced rGO-modified ternary Cu-doped NiFe2O4/TiO₂ electrodes for high performance supercapacitors
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.12.016
Vidhi , Mohd Sadiq , Anjani Kumar Singh , O.P. Thakur
{"title":"Fabrication and electrochemical insights into advanced rGO-modified ternary Cu-doped NiFe2O4/TiO₂ electrodes for high performance supercapacitors","authors":"Vidhi ,&nbsp;Mohd Sadiq ,&nbsp;Anjani Kumar Singh ,&nbsp;O.P. Thakur","doi":"10.1016/j.ceramint.2024.12.016","DOIUrl":"10.1016/j.ceramint.2024.12.016","url":null,"abstract":"<div><div>In this study, we employed a comparative approach by evaluating the composites CuFe<sub>2</sub>O<sub>4</sub>-rGO-TiO<sub>2</sub> (CFRT4), NiFe<sub>2</sub>O<sub>4</sub>-rGO-TiO<sub>2</sub> (NFRT5) and Cu<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>-rGO-TiO<sub>2</sub> (CNFRT6) against single compounds, CuFe<sub>2</sub>O<sub>4</sub> (CF1), NiFe<sub>2</sub>O<sub>4</sub> (NF2) and Cu<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> (CNF3). The electrodes were fabricated using drop-cast technique and investigated using XRD, FESEM, FTIR, XPS, VSM and BET. CNFRT6 showed highest specific surface area of 14.57 m<sup>2</sup>/g. Using symmetric two electrode system with 3M H<sub>2</sub>SO<sub>4</sub> electrolyte, in CV analysis, specific capacitance of CNFRT6 was determined to be 48.4 F/g at 10 mV/s. GCD analysis revealed that CNFRT6 attained highest specific capacitance value of 213.18 F/g at the current density of 0.25 A/g. The CNFRT6 yielded energy density (E<sub>d</sub>) of 18.95 Wh/Kg at current density 0.25 A/g. Further, it achieved power density (P<sub>d</sub>) of 1200 W/kg at 3 A/g. Obtained results suggest that Cu<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>-rGO-TiO<sub>2</sub> composite exhibited enhanced electrochemical properties and thus, it can be employed to fabricate electrodes for application in supercapacitors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5679-5694"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143357469","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
Improving thermoelectric properties of high-entropy (Ca0.27Sr0.27Ba0.27La0.19)TiO3-δ ceramics through defect engineering by controlling the oxygen vacancy content
IF 5.1 2区 材料科学
Ceramics International Pub Date : 2025-02-01 DOI: 10.1016/j.ceramint.2024.11.406
Ziyao Wei , Zhihao Lou , Xin Xu , Ping Zhang , Jie Xu , Feng Gao
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