Journal of The European Ceramic Society最新文献

{"title":"Ni-doped cobalt-free perovskite as the cathode for proton ceramic fuel cells","authors":"Yibei Wang ,&nbsp;Yaowei Liu ,&nbsp;Yinxiao Wang ,&nbsp;Yueze Li ,&nbsp;Biao Wang ,&nbsp;Chunling Lu ,&nbsp;Bingbing Niu","doi":"10.1016/j.jeurceramsoc.2025.117199","DOIUrl":"10.1016/j.jeurceramsoc.2025.117199","url":null,"abstract":"<div><div>Proton ceramic fuel cells (PCFCs), as a clean energy technology with broad application prospects, hold tremendous potential in the field of energy conversion. The development of PCFCs is limited by air electrode due to the slow kinetics at below 700°C. This paper introduces novel cobalt-free cathode Ba_0.5Sr_0.375Fe_{0.875-<em>x</em>}Zr_0.125Ni_<em>x</em>O_3-δ (D-BSFZN<em>x</em>, <em>x</em> = 0, 0.125, 0.25) for PCFCs. Among them, D-BSFZ exhibits a second phase, which transfers to a pure phase after Ni doping. Based on the first-principles calculations (Density Functional Theory (DFT)), the oxygen vacancy formation energy decreases from 0.37 eV for D-BSFZ to 0.04 eV for D-BSFZN0.125. The research results indicate that Ni doping favors the formation of <span><math><msubsup><mrow><mi>V</mi></mrow><mrow><mi>O</mi></mrow><mrow><mo>.</mo><mo>.</mo></mrow></msubsup></math></span>. The Density of States (DOS) and energy band diagram indicate a reduction in the band gap from 0.0065 eV to 0.0017 eV. The maximum conductivity increases from 43.20 to 64.59 S cm⁻¹ within the temperature range of 300–800 °C, suggesting that Ni doping can enhance the conductivity of D-BSFZ. The polarization resistance of D-BSFZN electrode on BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ (BZCYYb) electrolyte at 650 °C is 0.06 Ω cm² in air, and the polarization resistance stability test at 550 °C can reach 100 h without significant degradation. The maximum power densities (MPD) of the single cell with D-BSFZN0.125 as air electrode at 650 °C reaches 779 mW cm⁻².</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117199"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156184","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}

{"title":"Axial plasma spraying of aqueous solution precursors: A facile approach for columnar thermal barrier coatings","authors":"Thomas Hervy ,&nbsp;Nicholas Curry ,&nbsp;Stefan Björklund ,&nbsp;Frantisek Lukac ,&nbsp;Shrikant Joshi","doi":"10.1016/j.jeurceramsoc.2025.117189","DOIUrl":"10.1016/j.jeurceramsoc.2025.117189","url":null,"abstract":"<div><div>Thermal barrier coatings (TBC) are an essential part of modern gas turbines for aviation and power generation. As such, there is an incessant demand for improved TBC performance and longevity. Of the possible coating microstructures, the columnar structure first produced by electron beam physical vapour deposition was found to be most durable. The subsequently developed suspension plasma spray coatings are seen as an alternative method for producing columnar TBCs but typically utilise flammable solvents to achieve such structures. Aqueous solution precursors have also been used as a feedstock to deposit yttria stabilised zirconia (YSZ) TBCs; however, columnar structures have proven elusive, with solution precursor plasma spray (SPPS) deposition conditions and throughputs involving radial feed spray torches also being industrially unattractive. This study illustrates the first columnar coatings of single-layer yttria stabilised zirconia from an aqueous solution precursor using an axial feed capable plasma torch. Coatings have been shown to be columnar structured over a robust operating window, fully tetragonal in phase constitution and capable of being deposited at rates that can be commercially interesting. These initial results lay a great foundation for further TBC development utilizing an aqueous, powder-free, feedstock.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117189"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cuprite crystallization in glasses: Redox changes and the impact of copper and lead in reducing atmospheres","authors":"Cécile Noirot ,&nbsp;Laurent Cormier ,&nbsp;Daniel R. Neuville ,&nbsp;Nadine Schibille","doi":"10.1016/j.jeurceramsoc.2025.117195","DOIUrl":"10.1016/j.jeurceramsoc.2025.117195","url":null,"abstract":"<div><div>The production of red and orange cuprite glass and glazes depends on a complex interplay of glass composition, redox states, and thermal treatments. This study investigates how lead and copper concentrations impact the copper redox state and cuprite crystal formation. Spectroscopy (EPR, XANES at Cu L₃ and K edges) shows that high copper content leads to slight oxidation, while high lead levels induce mild reduction, neither of which directly initiating cuprite crystallization. In situ XANES analysis under reducing conditions reveals that strong undercooling is essential for cuprite formation, with lead primarily lowering the glass transition temperature, allowing large dendritic cuprite crystals to produce red colors while smaller crystals yield orange. These findings shed light on ancient glassmaking techniques, such as those in Roman glass tesserae.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117195"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156924","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}

{"title":"Corrigendum to “Strontium-free Ruddlesden–Popper cuprates (La1.7Ca0.3Cu0.75M0.25O4+δ, M = Fe, Co, Ni) as cathode materials for high-performance solid oxide fuel cells” [J. Eur. Ceram. Soc. 45 (2025), 117138]","authors":"Seoyoon Shin ,&nbsp;Xiubing Huang ,&nbsp;Mi Young Oh ,&nbsp;Youn Jin Ye ,&nbsp;Jinwoo Lee ,&nbsp;John T.S. Irvine ,&nbsp;Seokhee Lee ,&nbsp;Tae Ho Shin","doi":"10.1016/j.jeurceramsoc.2024.117165","DOIUrl":"10.1016/j.jeurceramsoc.2024.117165","url":null,"abstract":"","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117165"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-efficiency energy storage in BiFeO3 composite ceramics via BaO-TiO2-SiO2 glass modification","authors":"Rhys Montecillo ,&nbsp;Chien-An Chen ,&nbsp;R.R. Chien ,&nbsp;Li-Yuan Chen ,&nbsp;Cheng-Sao Chen ,&nbsp;Chi-Shun Tu ,&nbsp;Kuei-Chih Feng","doi":"10.1016/j.jeurceramsoc.2025.117197","DOIUrl":"10.1016/j.jeurceramsoc.2025.117197","url":null,"abstract":"<div><div>Electric breakdown strength, fatigue resistance, and low-temperature sintering are critical factors in the high power-density dielectric capacitors in regard to energy-storage capability. This work highlights the energy-storage performance in the 45BaO-32TiO₂-23SiO₂ (BTS) glass-added BiFeO₃ composite ceramics (<em>x</em> = 0, 0.5, 1, 3, 5, and 7 wt%). The BTS additive in the BiFeO₃ ceramic matrix raises breakdown electric field (<em>E</em>_<em>b</em> &gt; 400 kV/cm), thermal stability (&gt;100 °C), and fatigue resistance (&gt; 1 ×10⁴ charge-discharge cycles). The maximal energy efficiencies (<em>η</em>) and recoverable energy densities (<em>W</em>_<em>rec</em>) are about 83.5 % and 1.19 J/cm³ in 1 wt%-BTS addition and 76.4 % and 1.36 J/cm³ in 3 wt%-BTS addition. High energy efficiency and <em>E</em> field can be linked to the glass network, which acts as a conduction barrier in the matrix to reduce current leakage. This work presents an effective composite design for improving storing efficiency and applied <em>E</em> field through the glass integration.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117197"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156933","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}

{"title":"New kinetic model for competitive crystallization: Analysis and application","authors":"Jana Shánělová,&nbsp;Jiří Málek,&nbsp;Pavel Čičmanec,&nbsp;Simona Martinková","doi":"10.1016/j.jeurceramsoc.2025.117194","DOIUrl":"10.1016/j.jeurceramsoc.2025.117194","url":null,"abstract":"<div><div>Understanding nucleation and crystal growth in undercooled liquids is crucial in the glass and glass-ceramic industry. We developed a new kinetic model for competitive crystallization involving surface layer growth and internal volume nuclei growth. This model allows the separate determination of crystal growth rate and nucleation density. The crystal growth rate is calculated from the extrapolated beginning of the isothermal DSC curve using crystallization enthalpy and mean powder grain radius. A unique method was developed to determine nucleation process parameters using the master plot of the <em>y</em>-function, applicable to both isothermal and non-isothermal DSC data. Verification with Se₇₀Te₃₀ powder showed excellent agreement with experimental data, matching previously published crystal growth rates. For the first time, we determined the nucleation rate and time lag at 60°C for this glass composition. Introduced methods are straightforward, effective, and applicable to glassy materials with similar crystallization behavior.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117194"},"PeriodicalIF":5.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156189","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}

{"title":"A novel prediction model for temperature-stress dependent creep rupture life in structural ceramics","authors":"Jiabin Yang ,&nbsp;Yanli Ma ,&nbsp;Ziyuan Li ,&nbsp;Tianqi Wei ,&nbsp;Tianzi Shi ,&nbsp;Feilong Zhang ,&nbsp;Weiguo Li ,&nbsp;Zhaoliang Qu","doi":"10.1016/j.jeurceramsoc.2025.117188","DOIUrl":"10.1016/j.jeurceramsoc.2025.117188","url":null,"abstract":"<div><div>In this study, based on the Force-Heat equivalence energy density principle and incorporating the theory of dissipated power, a theoretical model has been developed to predict the creep rupture life of structural ceramics. The novelty of this work lies in proposing a critical energy density for the creep rupture of structural ceramics under various temperature-stress combinations, and the life prediction model developed on this basis does not contain any adjustable fitting parameters. The theoretical model has been well verified by a large number of experimental results. Moreover, the model analysis indicates that increasing the fast-fracture strength of structural ceramics is beneficial for enhancing their resistance to creep, with this enhancement being more pronounced at high stress levels or elevated temperatures. This work contributes to a deeper understanding of the performance and reliability of structural ceramic materials throughout their service life under operating temperature conditions.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117188"},"PeriodicalIF":5.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156937","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}

{"title":"Development of lightweight architecture of geopolymer via extrusion-based 3D printing for CO2 capture","authors":"Sk S. Hossain,&nbsp;Farid Akhtar","doi":"10.1016/j.jeurceramsoc.2025.117191","DOIUrl":"10.1016/j.jeurceramsoc.2025.117191","url":null,"abstract":"<div><div>Mitigation of CO₂ emissions has been a major societal concern in recent decades, and post-combustion capture of CO₂ is an effective strategy proposed by the research community. Hierarchical porous geopolymer monoliths were fabricated using extrusion-based 3D printing for CO₂ capture. The kaolin-based viscoelastic paste was first formulated using alkali activators and plasticizer, and it was observed that the viscosity increased over time. Second, the 3D printed porous monoliths were treated using different post-processing conditions like thermal curing, hydrothermal curing, and high-temperature thermal treatment and their physico-mechanical properties and CO₂ adsorptive were investigated. Thermally cured and heated specimens exhibited an amorphous phase, while zeolite phases were observed in the hydrothermally treated specimens. Printed and subsequently hydrothermally treated mechanically stable specimens showed significantly higher CO₂ adsorption (1.22 mmol/g) than conventionally casted geopolymer (0.66 mmol/g). Combining 3D printing with geopolymer technology could offer a sustainable approach design and structure adsorbents for CO₂ capture.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117191"},"PeriodicalIF":5.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning thermophysical properties of zirconate pyrochlore systems: B-site driven non-stoichiometric approach","authors":"Santosh K. Sahu ,&nbsp;R. Shukla ,&nbsp;V. Grover ,&nbsp;R. Dawar ,&nbsp;P.K. Patro ,&nbsp;Tijo Vazhappilly ,&nbsp;Rajashri Urkude ,&nbsp;Biplab Ghosh","doi":"10.1016/j.jeurceramsoc.2025.117190","DOIUrl":"10.1016/j.jeurceramsoc.2025.117190","url":null,"abstract":"<div><div>Chemical doping is the usual strategy adopted to design materials with low thermal conductivity and high thermal expansion coefficient for thermal barrier coating(TBC) applications. This, however, enhances chances of phase separation at high temperatures. Present work investigates how non-stoichiometry affects structure and thermophysical properties of Nd_2-xZr_2+xO_7+x/2 system (x = 0, 0.2, 0.4, 1.2) synthesized via gel combustion. Powder-XRD shows composition-driven phase transition from ordered pyrochlore(x = 0–0.4) to defect fluorite(x = 1.2). Raman and X-ray absorption spectroscopies reveal local disordered fluorite-type domains within ordered pyrochlore. This hybrid structure enhances thermal-expansion and reduces thermal-conductivity due to increased phonon scattering and reduced lattice energy. HT-XRD establishes phase stability upto 1473 K, and non-stoichiometric pyrochlores exhibit relatively higher heat capacities. The structural and thermal properties of different nominal compositions calculated using density functional theory are in good agreement with experiments. This research puts forth a promising strategy, of tweaking the stoichiometry, to enhance materials' performance as TBCs.</div></div><div><h3>Summary of Novel Conclusion</h3><div>The present work employs the no additive, B-site driven non-stoichiometry to tailor the structural and thermophysical properties in Nd₂Zr₂O₇. In this context, Nd_2-xZr_2+xO_7+x/2 ceramics (x = 0, 0.2, 0.4, 1.2) have been synthesized, characterized and investigated for their thermophysical behaviour. The bulk single-phasic and locally hybrid nature of crystal structure of all the compositions has been established using XRD, HT-XRD, Raman spectroscopy and X-ray absorption spectroscopy. The prevalence of fluorite-type microdomains in bulk pyrochlore structure leads to increase in thermal expansion, lowering of thermal conductivity and increase in specific heat capacity. These properties have been validated by theoretical DFT calculations. The possibility to favorably tailor the thermophysical properties of pyrochlore system by just maneuvering the stoichiometry, opens up an exciting route to design superior candidates for thermal barrier coating applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117190"},"PeriodicalIF":5.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157560","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}

{"title":"Preparation and design of barium feldspar-based microwave dielectric ceramics from graphite tailings","authors":"Shuai Zhu ,&nbsp;Xin Wang ,&nbsp;Yuhui Li ,&nbsp;Xiaochi Lu ,&nbsp;Liang Cao ,&nbsp;Lei Yu ,&nbsp;Zhefei Wang","doi":"10.1016/j.jeurceramsoc.2024.117179","DOIUrl":"10.1016/j.jeurceramsoc.2024.117179","url":null,"abstract":"<div><div>Novel barium feldspar-based microwave dielectric ceramics derived from graphite tailings (BAS-GT) were prepared via the solid-state reaction method. The effects of Sr^2 + substitution on the phase composition, microstructure and microwave dielectric properties of sintered ceramics were investigated. Results demonstrated that the barium feldspar solid solution co-existed with Ca₂Al₂SiO₇ when excess Sr²⁺ was introduced. The Sr²⁺ substitution effectively improved the densification and microwave dielectric properties of the BAS-GT ceramics, especially the quality factor (<em>Q</em>×<em>f</em>) and temperature coefficient of resonant frequency (<em>τ</em>_<em>f</em>), attributed to the optimised phase composition and good sintering behaviour. A component standard for utilising graphite tailings in microwave dielectric ceramics was established. The 10 mol% Sr²⁺ substituted BAS-GT ceramic samples sintered at 1150 °C exhibited optimised microwave dielectric properties, with <em>εᵣ</em> = 7.13, <em>Q</em>×<em>f</em> = 28,452 GHz, and <em>τ</em>_<em>f</em> = –27.12 ppm/°C, indicating significant potential of these ceramics for applications in 5 G wireless communication technology.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 6","pages":"Article 117179"},"PeriodicalIF":5.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156935","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}