Journal of the American Ceramic Society最新文献

{"title":"Microstructure and electromagnetic properties of Ca–V co-doped YIG ferrite with narrow ferromagnetic resonance linewidth","authors":"Yuhan Yang,&nbsp;Rongdi Guo,&nbsp;Guohua Wu,&nbsp;Zhongqiang Hu,&nbsp;Ming Liu","doi":"10.1111/jace.70203","DOIUrl":"https://doi.org/10.1111/jace.70203","url":null,"abstract":"<p>Yttrium iron garnet (YIG) ferrites play a crucial role in microwave devices due to their tunable saturation magnetization and narrow ferromagnetic resonance (FMR) linewidth. In this study, we successfully synthesized Ca–V co-doped Y_2.7−2<i>_x</i>Ca_0.3+2<i>_x</i>Fe_4.7−<i>_x</i>Zr_0.3V<i>_x</i>O₁₂ (0.00 ≤ <i>x</i> ≤ 0.35, ∆<i>x</i> = 0.07) ferrite and conducted an in-depth investigation into its microstructure and electromagnetic properties. The findings indicate that moderate ionic substitution can effectively reduce the porosity and FMR linewidth while enhancing the saturation magnetization and resistivity. In particular, the occupation rate of cation sites was comprehensively analyzed, and the separation of the FMR linewidth was calculated. At a substitution level of <i>x</i> = 0.07, the YIG ferrite exhibits excellent comprehensive performance, where the sample has a bulk density of 4.968 ± 0.011 g/cm³, a saturation magnetization of 1932 Gs, an FMR linewidth of 28.80 ± 1.25 Oe, a coercivity of 2.24 Oe, and a DC resistivity of (3.50 ± 0.37) × 10⁶ Ω•m. The Ca–V co-doped CaZr-YIG ferrite exhibits not only superior overall performance but also considerable potential for integration into microwave component design.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196399","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":"Modulation of zinc oxide-tricalcium phosphate microstructure, hardness, and cell-viability through controlled magnesium oxide incorporation","authors":"Maria Antonia Sainz,&nbsp;Sara Serena,&nbsp;Angel Caballero","doi":"10.1111/jace.70199","DOIUrl":"https://doi.org/10.1111/jace.70199","url":null,"abstract":"<p>Synthetic calcium phosphate-based biomaterials have been used over the past decades in medical applications such as bone tissue repair, reconstruction, and replacement. In the present study, the sintering process, phase relationships, microstructure, hardness, and adjusted biodegradation rates, toxicity, and cytocompatibility of zinc oxide-tricalcium phosphate (ZnO-TCP) biomaterials tuned with magnesium oxide (MgO) were investigated for the first time. Specifically, 1 wt% ZnO-TCP (1Z-TCP) biomaterials were modified by incorporating varying amounts of MgO to tailor their properties, positioning them as a promising alternative to pure TCP. In this study, 1Z-TCP biomaterials with MgO content ranging from 0.125 to 1.0 wt% were obtained via solid-state reaction sintering. The effects of MgO on densification, microstructural characteristics, hardness, and Young's modulus of 1ZnO-<i>x</i>MgO-TCP (1Z-<i>x</i>M-TCP) biomaterials were systematically analysed. Subsequently, the “in vitro” solubility of the biomaterials in simulated body fluid was assessed, followed by in vitro cell culture experiments using MG63 osteoblast-like cells. The results indicated that the biomaterials studied were non-cytotoxic and exhibited favorable cell adhesion, proliferation, and differentiation, suggesting that both 1Z-TCP and 1Z-<i>x</i>M-TCP biomaterials promote improved cell-material interaction compared to pure-TCP. The results obtained provide a framework for designing 1Z-<i>x</i>M-TCP materials tailored to specific applications by enabling the tuning of degradation rate, mechanical properties, biological response, and cell viability through the controlled MgO incorporation.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70199","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196400","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":"Three-dimensional spectral and spatial resolution of raman measurements in sapphire","authors":"A. Bellafatto,&nbsp;I. E. Reimanis","doi":"10.1111/jace.70202","DOIUrl":"https://doi.org/10.1111/jace.70202","url":null,"abstract":"<p>Raman spectroscopy affords a simple and practical tool to determine subsurface stresses in oxides via the identification of spectral peak locations. To access the full utility of the technique, it is necessary to understand and quantify the role of material-specific measurement parameters on the peak shapes and locations. This work employs systematic experiments on sapphire to examine how peak height and width influence peak identification for five different peaks: 378, 417, 576, 644, and 751 <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>cm</mi>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 <annotation>${rm cm}^{-1}$</annotation>\u0000 </semantics></math>, with 417 examined in both the R- and C-plane. Experiments are performed on the basal (0001) and rhombohedral (1102) planes of sapphire using different experimental magnifications. It is revealed that the accuracy of peak identification depends strongly on the wavenumber, due to peak-specific width and decreases with lower signal intensity. Basal plane sapphire leads to lower intensity and subsequently lower accuracy. The results are presented in a way that can be used to determine the statistical accuracy of stress measurements in sapphire by Raman spectroscopy.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196364","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":"Modeling of magnetic properties of A2BB′O6 compounds using ab initio and Monte Carlo methods","authors":"Martin Heczko,&nbsp;Martin Zeleny,&nbsp;Renaud Patte,&nbsp;Denis Ledue","doi":"10.1111/jace.70204","DOIUrl":"https://doi.org/10.1111/jace.70204","url":null,"abstract":"<p>Ab initio and Monte Carlo simulations are employed to estimate isotropic exchange interactions and Curie temperature of A₂BB′O₆ oxides (A alkaline-earth metal or transition metal and B, B′ transition metals). The dominant (B–B') interactions are antiferromagnetic (AFM) between the first and second nearest neighbors (NN), and these interactions strengthen as the magnetic moments of B and B' increase. Third and fourth NN interactions (B–B or B′–B′) are always weaker than the others. Although B′–B′ interactions induce magnetic frustration if they are AFM, the ground state is always ferrimagnetic. The Curie temperature range spans from 290 K for Sr₂FeOsO₆ to 640 K for Be₂FeOsO₆. Our study reveals that, in the search for a desired high Curie temperature of A₂BB′O₆ oxides, an A cation should be as small as possible, and B, B′ magnetic moments should be as large as possible.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196401","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":"Exploring entropic contributions of modifier cations in supercooled liquids through isotopic substitution","authors":"Tae-min Yeo,&nbsp;Sabyasachi Sen","doi":"10.1111/jace.70198","DOIUrl":"https://doi.org/10.1111/jace.70198","url":null,"abstract":"<p>The vibrational and configurational entropic contributions of modifier Li cations to the glass-to-liquid transition and the fragility of supercooled (Li,Na)PO₃ liquids are investigated using calorimetric measurements of their ⁷Li and ⁶Li isotopologues. Intriguingly, a measurable difference in excess entropy Δ<i>S^exc</i> is observed between the isotopologues, which implies that the modifier Li cations must contribute significantly to the vibrational and configurational entropy of these supercooled liquids. These modifier contributions are shown to influence the thermodynamic and kinetic fragility of these liquids, with more pronounced effects observed in mixed-alkali systems. The larger deviation of heat capacity from the Dulong–Petit limit at the glass transition temperature <i>T_g</i> in mixed-alkali glasses compared to their single-alkali counterparts is attributed to the coupled motion of dissimilar alkali ions in the former. Such motions act as a catalytic step allowing the onset of network rearrangement to occur in mixed-alkali systems without the need for full vibrational excitation of the network at <i>T_g</i>. The lighter ⁶Li isotope facilitates this coupled motion more efficiently than the heavier ⁷Li isotope, resulting in a greater departure from the Dulong–Petit limit of ⁶Li-containing mixed-alkali glasses, compared to their ⁷Li isotopologues.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70198","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196367","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":"Rapid laser-assisted compositional screening of high-entropy diborides for superior oxidation resistance up to 2400°C","authors":"Zihao Wen,&nbsp;Haifeng Tang,&nbsp;Yiwen Liu,&nbsp;Hulei Yu,&nbsp;Lei Zhuang,&nbsp;Yanhui Chu","doi":"10.1111/jace.70212","DOIUrl":"https://doi.org/10.1111/jace.70212","url":null,"abstract":"<p>Achieving superior oxidation resistance in high-entropy diborides (HEB₂) above 1800°C is critically imperative for their thermal protection applications, yet related studies are limited. Here, we propose a rapid laser-assisted compositional screening strategy to search for HEB₂ with superior oxidation resistance from 1800°C to 2400°C. Specifically, the oxidation resistance of as-fabricated (Hf_0.28Zr_0.28Ta_0.28M_0.16)B₂ (HEB₂-M; M = Ti, V, Cr, Nb, Mo, W, Sc, Y, La, Nd, Sm, Gd, Dy, Ho, Er, Tm, Yb, and Lu) samples with 18 different transition-metal and rare-earth elements is rapidly evaluated at 2100°C via a self-developed high-throughput laser oxidation test technology. The results demonstrate that the as-fabricated HEB₂-W samples possess the best oxidation resistance among all the samples. Further oxidation tests have shown that the oxidation behavior of the as-fabricated HEB₂-W samples follows the parabolic law from 1800°C to 2400°C, demonstrating their superior oxidation resistance across a wide temperature range. Such good oxidation resistance is attributed to the formation of WO₃‒B₂O₃ glass with increased viscosity, which can facilitate the densification of the oxide layer.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196368","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":"Effects of particle size and additives on phase transformation of cubic BN during the spark plasma sintering","authors":"Jiao Li,&nbsp;Yiquan Wu","doi":"10.1111/jace.70196","DOIUrl":"https://doi.org/10.1111/jace.70196","url":null,"abstract":"<p>Cubic boron nitride (cBN) powders with different particle sizes ranging from 250 nm to 6 µm were sintered at temperatures between 800°C and 1450°C under a pressure of 100 MPa using spark plasma sintering (SPS). Elevated sintering temperatures promoted phase transformation from cubic to hexagonal BN phase. It is found that the activation energy for phase transition increased dramatically with cBN particle sizes, ranging from 43 to 739 kJ •mol⁻¹. Additionally, the addition of various oxide additives (Al₂O₃, Y₂O₃, ZrO₂, SiO₂, and MgO) induced distinct effects on cBN phase transformation during the SPS process. Among these, SiO₂ was observed to retard the transformation due to the separating effect of amorphous SiO₂, whereas other additives accelerated the transformation by reducing the activation energy of cBN.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196365","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":"Modified C/SiC composites with high ablation resistance: Data-driven intelligent design and experimental validation","authors":"Zirui Du,&nbsp;Chaokun Song,&nbsp;Kang Guan,&nbsp;Pinggen Rao,&nbsp;Xiaohui Yang,&nbsp;Longteng Bai,&nbsp;Shengbo Shi,&nbsp;Jing Wang,&nbsp;Yongsheng Liu,&nbsp;Qingfeng Zeng","doi":"10.1111/jace.70209","DOIUrl":"https://doi.org/10.1111/jace.70209","url":null,"abstract":"<p>Improving the ablation resistance of carbon fiber-reinforced silicon carbide (C/SiC) composites is essential to meet the stringent demands of ultra-high-temperature applications, but traditional empirical design approaches are resource-intensive and time-consuming. This study presents a novel data-driven methodology integrating machine learning (ML) with experimental validation to optimize C/SiC composite ablation resistance. Through systematic data preprocessing and feature analysis of 102 experimental samples, an XGBoost regression model was developed, achieving satisfactory prediction accuracy (mean absolute error &lt; ∼0.075, mean squared error &lt; ∼0.015, and coefficient of determination [R²] &gt; ∼0.75) for ablation rate. SHapley Additive exPlanations (SHAP) analysis revealed that modifier properties, particularly standard enthalpy and melting point, predominantly influence ablation resistance. The ML-guided design strategy, implemented through Bayesian optimization, led to the successful fabrication of ZrB₂-modified C/SiC composites with exceptional ablation resistance. The optimized composite, containing approximately 20.0 vol.% ZrB₂, achieved a linear ablation rate of 2.083 µm/s under oxyacetylene torch testing, representing a significant improvement over conventional compositions. Microstructural analysis confirmed the formation of a dense SiO₂‒B₂O₃ protective layer, validating the predicted mechanism of enhanced ablation resistance. This work establishes a robust framework for accelerated development of ultra-high-temperature ceramics and demonstrates the efficacy of ML-driven approaches in materials design optimization. An object-oriented software with interactive graphical user interface has been developed. These methodologies have been integrated into an interactive software, Modified C/SiC Ablation Rate intelligent design Software (MARS), creating an efficient tool for the accelerated design of C/SiC composites with tailored ablation performance.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196366","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":"Influence of precursor selection on the structural integrity and electrochemical performance of α-NaMnO2 cathode","authors":"Ebru Doğan,&nbsp;Rawdah Whba,&nbsp;Canan Aksu Canbay,&nbsp;Muhammad Arshad,&nbsp;Sevda Sahinbay,&nbsp;Serdar Altin","doi":"10.1111/jace.70217","DOIUrl":"https://doi.org/10.1111/jace.70217","url":null,"abstract":"<p>In this study, the α-NaMnO₂ phase was successfully synthesized using three different combinations of starting materials: Na₂O₂/Mn₂O₃, Na₂O₂/MnO₂, and Na₂CO₃/Mn₂O₃. A one-step heat treatment at 900°C for 5 h under air with quenching was applied. X-ray diffraction analysis confirmed the formation of pure α-NaMnO₂ phase in all three samples, with only slight variations in lattice parameters. Elemental and oxidation state analyses were conducted using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy with energy-dispersive X-ray spectroscopy, and inductively coupled plasma measurements. XPS results revealed noticeable differences in Mn ion valence states, suggesting variations in oxygen stoichiometry and the presence of oxygen-excess structures. Electrochemical evaluations were performed in both half-cell and full-cell configurations. The samples exhibited distinct performance characteristics, with capacity fade over 100 cycles at C/3 between 1.5 and 4.3 V measured at 83.6%, 73.9%, and 83.1%, respectively. These differences correlated with the average oxidation state of Mn and O content. Full-cells, paired with presodiated commercial hard carbon anodes, showed the highest capacity for the Na₂O₂/MnO₂ system and the best retention for the Na₂CO₃/Mn₂O₃ sample. Overall, this work demonstrates how even small variations in starting materials can significantly influence the structural and electrochemical behavior of α-NaMnO₂.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197275","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":"Synthesis of novel multi-anion Hf0.8Zr0.2B0.1C0.5N0.4 powder","authors":"Xiaoyu Wang,&nbsp;Dewei Ni,&nbsp;Bowen Chen,&nbsp;Feiyan Cai,&nbsp;Yang Hu,&nbsp;Yanmein Kan,&nbsp;Yusheng Ding,&nbsp;Shaoming Dong","doi":"10.1111/jace.70218","DOIUrl":"https://doi.org/10.1111/jace.70218","url":null,"abstract":"<p>In this work, a novel multi-anion ultra-high temperature ceramic (UHTCs) powder—Hf_0.8Zr_0.2B_0.1C_0.5N_0.4, was designed and synthesized by carbothermal and borothermal reduction above 1400°C using B₄C, carbon black, and N₂ as boron, carbon, and nitrogen sources, respectively. The as-synthesized Hf_0.8Zr_0.2B_0.1C_0.5N_0.4 powder has a rock-salt crystal structure and high compositional homogeneity, with lattice constant of 4.602 Å. It has an average particle size of ∼0.13 µm and low oxygen content of ∼0.43 wt%. This work not only expands the category of UHTCs but also opens a new insight to develop and design UHTCs with multi-anion and cation structures for performance optimization.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197170","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}