Journal of the American Ceramic Society最新文献

{"title":"Experimental and thermodynamic modeling study of phase equilibria in the ZnO–SnO–SnO2–SiO2 system","authors":"Maksym Shevchenko,&nbsp;A. Ilyushechkin,&nbsp;Evgueni Jak","doi":"10.1111/jace.20695","DOIUrl":"https://doi.org/10.1111/jace.20695","url":null,"abstract":"<p>Experimental investigation and thermodynamic modeling of the phase equilibria in the ZnO–SnO–SnO₂–SiO₂ system have been undertaken to characterize Sn behavior in the high-Zn slags for recycling of waste electrical and electronic materials (WEEE) through the black copper process. Phase equilibria data at 870–1746°C were obtained through equilibration of synthetic mixtures in sealed silica ampoules or open crucibles, on Ir wires, Pt, Pt-Ir, Mo, and Re foils, followed by rapid quenching, and electron probe X-ray microanalysis. Phase equilibria and liquidus isotherms of the ZnO–“SnO”–SiO₂ system in equilibrium with Sn metal, ZnO–“SnO₂”–SiO₂ system in air, and ZnO–SnO–SnO₂–SiO₂ in equilibrium with Au–Sn metal were measured in the quartz/tridymite/cristobalite SiO₂, cassiterite SnO₂, zincite ZnO (with minor solubility of SnO₂), willemite Zn₂SiO₄, and spinel Zn₂SnO₄ phase fields.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20695","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Enhanced separation of V-spinel and Ti-spinel in vanadium slag guided by crystallization mechanism","authors":"Guoliang Feng,&nbsp;Jintao Gao,&nbsp;Xi Lan,&nbsp;Lei Guo,&nbsp;Zhancheng Guo","doi":"10.1111/jace.20701","DOIUrl":"https://doi.org/10.1111/jace.20701","url":null,"abstract":"<p>Vanadium (V) and titanium (Ti) are widely used in high-performance ceramics due to their excellent magnetic, electrical, and chemical properties. Vanadium slag from the smelting of vanadium–titanium magnetite contains large amounts of V and Ti, which are enriched into spinel in the form of mutual replacement. However, the lack of research on the crystallization mechanism of V and Ti limits their respective recovery. In this study, the crystallization of V and Ti in vanadium slag with temperature was investigated, where V was primarily crystallized into V-spinel between 1773 and 1573 K, while Ti was mainly crystallized into Ti-spinel between 1573 and 1373 K. Afterward, the enhanced separations of V-spinel and Ti-spinel were realized by controlling the cooling rate using super-gravity in the corresponding temperature range, respectively. High-purity crystals of V-spinel with up to 42.68 wt.% V₂O₃ and Ti-spinel containing up to 32.87 wt.% TiO₂ was obtained. On this basis, the crystallization mechanism of V and Ti was revealed by crystal characterization, and the results showed that the crystallization of Ti lagged behind that of V due to the lower crystal stability of Ti-spinel than that of V-spinel. This study provides a theoretical basis and methodological guidance for the efficient utilization of vanadium slag.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving robust mechanical properties and high translucence in ZrO2–SiO2–Al2O3 ternary ceramic nanocomposites","authors":"Zihua Lei,&nbsp;Wenjun Yu,&nbsp;Le Fu","doi":"10.1111/jace.20712","DOIUrl":"https://doi.org/10.1111/jace.20712","url":null,"abstract":"<p>Transparent or translucent ceramics typically exhibit inferior mechanical performance, which restricts their wider application. Here, we aim to develop ZrO₂–SiO₂–Al₂O₃ ternary ceramic nanocomposites (TCNCs) that integrate those two often incompatible properties via microstructure engineering. A fixed ratio of 30 mol% SiO₂ was introduced into the ZrO₂–Al₂O₃ system, while the ratios between ZrO₂ and Al₂O₃ were varied. Additionally, different forms of Al₂O₃ (crystallization or amorphous) were used, resulting in four types of TCNCs. Among the samples studied, the TCNC containing 60 mol% ZrO₂ and 10 mol% amorphous Al₂O₃ achieved high translucency and remarkable mechanical properties. The TCNC comprised ZrO₂ nanoparticles embedded in SiO₂ glass matrix and Al₂O₃ glass domains. The superior properties of the TCNC can be attributed to its nanocrystalline-amorphous dual-phase microstructure. For TCNCs utilizing α-Al₂O₃ submicron particles as the aluminum source, despite their adequate mechanical properties, the agglomeration and lack of densification of these particles resulted in significant light scattering, rending the TCNCs opaque. This study demonstrates that engineering a nanocrystalline-amorphous dual-phase microstructure is an effective strategy to achieve a synergistic combination of robust mechanical properties and high translucence.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of 3D ZrO2 nanofibrous structures by solution blow spinning","authors":"Déborah dos S. Gomes,&nbsp;Maria O. G. Ferreira,&nbsp;Bianca V. Sousa,&nbsp;Lisiane N. L. Santana,&nbsp;Gelmires. A. Neves,&nbsp;Romualdo R. Menezes","doi":"10.1111/jace.20683","DOIUrl":"https://doi.org/10.1111/jace.20683","url":null,"abstract":"<p>Zirconia nanofibers are of great technological and economic interest with various potential applications areas, such as thermal barriers, sensors, catalysis, and energy generation. Thus, this study aims to develop a non-sol-gel route for the production of 3D nanofibrous structures of zirconia, using solution blow spinning (SBS) technique. Precursor solutions were prepared using zirconium acetate in acetic acid solution and polyvinylpyrrolidone (PVP) was used as spinning aid polymer. 3D aerogel structures were produced by SBS. The influence of calcination temperature on phase evolution and fibers morphology was evaluated in the range of 500°C to 1000°C. Initially tetragonal phase was the stable structure, with the rise in temperature zirconia fibers underwent a transition to monoclinic phase. The average diameters ranged from 111 ± 38 nm to 458 ± 183 nm with temperature rise, but in all temperature aerogel structural integrity was observed. Therefore, a simplified non-sol-gel route using SBS proved efficient in producing 3D nanofibrous zirconia aerogel structures with potential application in several technological areas.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electric field enhancement of ceramics including microdefects","authors":"Kaishi Matsunaga,&nbsp;Jin Araki,&nbsp;Yuki Nakashima,&nbsp;Manabu Fukushima,&nbsp;Kiyoshi Hirao,&nbsp;Norimitsu Murayama,&nbsp;Wataru Nakao","doi":"10.1111/jace.20690","DOIUrl":"https://doi.org/10.1111/jace.20690","url":null,"abstract":"<p>In this study, a finite element analysis was performed to evaluate the effect of aspect ratios and dielectric constants of microdefects, such as pores, secondary phases, and grain boundary phases, on the electric field enhancement using the maximum field enhancement factor. For defect part with a lower dielectric constant than the solid part, including pores and secondary phases, as the aspect ratio of the defect part decreases (it becomes longer in the direction perpendicular to the electric field), the maximum electric field enhancement factor at the lateral surface of the defect part becomes higher. On the other hand, for defect part with a higher dielectric constant than the solid part, including grain boundary phases, the exact opposite behavior was observed. Moreover, it was also predicted that fine grain boundary phases act as a stronger electric field enhancement source than coarse pores.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20690","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Integrated experimental and thermodynamic modeling study of phase equilibria in the “CuO0.5”–CaO–AlO1.5 system","authors":"Georgii Khartcyzov,&nbsp;Maksym Shevchenko,&nbsp;Evgenii Nekhoroshev,&nbsp;Evgueni Jak","doi":"10.1111/jace.20698","DOIUrl":"https://doi.org/10.1111/jace.20698","url":null,"abstract":"<p>The phase equilibria in the “CuO_0.5”–CaO–AlO_1.5 system in equilibrium with Cu metal were investigated as part of the integrated experimental and thermodynamic modeling study of phase equilibria in the Cu–Pb–Zn–Fe–Ca–Si–Al–Mg–O–S–(As, Sn, Sb, Bi, Ag, Au, Ni, Cr, Co, and Na) gas/oxide liquid/matte/speiss/metal/solids system in support of the development and optimization of pyrometallurgical processes. The equilibration and quenching technique, followed by the electron probe X-ray microanalysis (EPMA) was used in the present study. The liquidus of the “CuO_0.5”–CaO–AlO_1.5 system in equilibrium with Cu, including primary phase fields of Ca₃Al₂O₆, Ca₁₂Al₁₄O₃₃, CaAl₂O₄, CaAl₄O₇, CaAl₁₂O₁₉, corundum (Al₂O₃), delafossite (CuAlO₂), and lime (CaO), as well as the immiscibility gap in the liquidi of these phases were characterized. The thermodynamic model parameters for the CaO–AlO_1.5 binary system and the “CuO_0.5”–CaO–AlO_1.5 ternary systems in equilibrium with Cu metal were reoptimized based on the experimental data obtained. New experimental results, combined with phase equilibria and thermodynamic literature data, were used to derive a self-consistent set of parameters of the thermodynamic model of all phases in the “CuO_0.5”–CaO–AlO_1.5 system in equilibrium with Cu metal, in agreement with the major 20-component system. The predicted phase diagram of the CaO–AlO_1.5 and “CuO_0.5”–CaO–AlO_1.5 systems were presented for the first time.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20698","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Conduction mechanism and electrochemical properties of P2-Na2/3Fe1/3Mn2/3O2 for Na-ion batteries","authors":"Ichrak Ben Slima,&nbsp;Krimi Moufida,&nbsp;Faouzi Missaoui,&nbsp;Lahcen Fkhar,&nbsp;Abdelfattah Mahmoud,&nbsp;Abdallah Ben Rhaiem","doi":"10.1111/jace.20707","DOIUrl":"https://doi.org/10.1111/jace.20707","url":null,"abstract":"<p>Layered transition metal oxides Na_xFe_1-yMn_yO₂ represent a cutting-edge cathode material for sodium-ion batteries because they demonstrate high capacity, excellent cycle rate, good electrochemical stability, and long lifetime. The widely used solid-state reaction method was utilized to prepare Na_2/3Fe_1/2Mn_2/3O₂ cathode active material. Using Rietveld refinement of X-ray diffraction data, the hexagonal system with P6₃/mmc space group and lattice constants <i>a</i> = <i>b</i> = 2.9184(9) Å and <i>c</i> = 11.2525(6) Å was identified. Scanning electron microscope analysis enables us to examine the morphology of this material. The optical band gap was calculated throughout the UV–visible spectroscopy in the 200–800 nm wavelength range. The gap energy was estimated to be equal to 2.60 eV. The electrical study relying on the complex impedance of the P2 compound confirms the presence of the three distinct phases with different conductivity behaviors. The semiconducting behavior has two phases: the first occurs for <i>T</i> ≤ 383 K with the NSPT mechanism, and the second occurs for <i>T</i> ≥ 423 K with the CBH mechanism. The electrochemical performance of this material was assessed on CR2032 coin-type half-cell configurations by investing galvanostatic charge-discharge cycling in the voltage range of 2–4.2 V. Up to 120 mAh g⁻¹, the cathode active material shows a high discharge capacity. When the scan rate is raised, the redox peaks exhibit a slight shift, indicating that the material has good structural stability and minimal polarization.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Re-optimization of the FeO–Fe2O3–SiO2 system integrated with experimental phase equilibria studies","authors":"Evgenii Nekhoroshev,&nbsp;Denis Shishin,&nbsp;Siyu Cheng,&nbsp;Maksym Shevchenko,&nbsp;Evgueni Jak","doi":"10.1111/jace.20702","DOIUrl":"https://doi.org/10.1111/jace.20702","url":null,"abstract":"<p>The Fe–Si–O system is important in understanding the slag chemistry of copper production which involves fayalite slags. It is also an important part of a 20-component Cu-Pb-Zn-Fe-Ca-Si-O-S-Al-Mg-Cr-Na-As-Sn-Sb-Bi-Ag-Au-Ni-Co thermodynamic database being developed for multiple processes and applications of ferrous and nonferrous metallurgy. The present work presents experimental data on high-temperature silica liquidus/miscibility gap in the Fe-Si-O system measured by equilibration/quenching/electron probe X-ray microanalysis (EPMA) method as well as a thermodynamic reassessment of the Fe–Si–O system within the 20-component database. The slag phase has been modeled within the modified quasichemical formalism to account for short-range ordering phenomena. The heat capacities of liquid endmembers have been updated in a way consistent with the physical principles of liquid slag cooling and glass transition, potentially opening a way for lower-temperature applications of the database regarding the leaching of minor elements from partially crystallized slags. Recent developments in thermodynamic modeling and optimization allowed us to perform the assessment of the system in a consistent way as a part of a multicomponent experimental dataset, leading to a superior prediction quality of the resulting thermodynamic database for industrial applications.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20702","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Study on recycling of lead-based piezoceramics using trimethylchloromethyl ammonium-based halide perovskite binder","authors":"Mohadeseh Tabeshfar,&nbsp;Mikko Nelo,&nbsp;Sivagnana Sundaram Anandakrishnan,&nbsp;Jani Peräntie,&nbsp;Yang Bai","doi":"10.1111/jace.20714","DOIUrl":"https://doi.org/10.1111/jace.20714","url":null,"abstract":"<p>Oxide-halide perovskite upside-down composites have been demonstrated for recycling heavy-eco-footprint piezoceramics. However, options for the binders are limited. As the binder significantly affects the electrical properties of the recycled materials, the available binder material pool needs to be expanded. This work explores the use of a halide perovskite compound, Me₃NCH₂ClCdCl₃ (TMCM-CdCl₃), as the binder to study the interplay between the filler's and binder's characteristics and its influence on electrical properties of the recycled piezoceramics. Two Pb-containing ceramic fillers, Pb(Zr,Ti)O₃ and Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃, which possess distinct permittivity and Curie temperatures, are used in the study. A wide range of fabrication temperatures span the fillers’ and binder's phase transition and decomposition regions are involved. Results suggest that a coincidence of the filler's ferroelectric-paraelectric phase transition with the binder's decomposition during fabrication can significantly degrade the composite's electrical properties due to the microstructural frustration among porosity increase, densification lag, and enlarged filler-binder permittivity mismatch. This work has achieved the champion relative permittivity of ∼600 at 1 kHz and comparable piezoelectric responses (charge and voltage coefficients of ∼90 pC N⁻¹ and 31-32 mVm N⁻¹, respectively) among all the known upside-down composites. These results advance the understanding of structure-property correlations in upside-down composites.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20714","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"A super broad emission band in tri-doped orthosilicate phosphors for full-spectrum white light illumination","authors":"Yiting Lin,&nbsp;Huiyu Ma,&nbsp;Hai Li,&nbsp;Hongxia Sang,&nbsp;Shixun Lian","doi":"10.1111/jace.20675","DOIUrl":"https://doi.org/10.1111/jace.20675","url":null,"abstract":"<p>A series of solid solution Sr<i>_m</i>Ca₂₋<i>_m</i>SiO₄ (SCS) tri-doped with Ce³⁺, Tb³⁺, Eu³⁺ (SCS: Ce, Tb, Eu) phosphors were synthesized by the traditional high-temperature solid-state reaction. In the orthosilicate crystal system Sr_1.5Ca_0.5SiO₄, tri-doped rare earth ions Ce³⁺, Tb³⁺, and Eu³⁺ are independent luminescent centers. Under the excitation of UV light, they exhibited three emission bands: the first broadband peaked at 420 nm, the second band with sharp lines peaked in green (about 554 nm), and the third band in the orange-red region (588–720 nm), which are originated from 5d → 4f of Ce³⁺,⁵D₄ →⁷F_<i>J</i> of Tb³⁺, and ⁵D₀ →⁷F_<i>J</i> of Eu³⁺, respectively. On the other hand, as aggregated luminescent centers which emission is with comparable intensities at suitable concentration resulted in separate luminescent peaks connected, form a super broad emission band and lead to color-tunable emission. To fine control white emission, a series of solid solution phosphors Sr<i>_m</i>Ca_1.969−<i>_m</i>SiO₄:0.6% Ce³⁺, 0.15% Tb³⁺, 0.8% Eu³⁺, 1.55%Li⁺ (SCS: Ce,Tb,Eu) had been prepared. This phosphor reveals that a full-spectra emission in the visible light region can be obtained when the mole percent of Sr²⁺ in the solid solution matrix is 65%–90% (<i>m</i> = 1.3–1.8), and the nominal composition Sr_1.7Ca_0.3SiO₄: 0.6% Ce³⁺, 0.15% Tb³⁺, 0.8% Eu³⁺, 1.55% Li⁺ phosphor can realize a super broad emission band with a full width at half maximum (FWHM) of 147 nm that match well with the solar spectrum in the visible light region. The result reveals that it is a potential single-phase full-spectrum white light (SFWL) phosphor for UV-chip-based white LED, which can be applied in full spectrum illumination and plant growth light sources. The luminescent mechanism was also discussed in detail.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 9","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144537262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}