Journal of the American Ceramic Society最新文献

{"title":"Tailoring Al-F-P-Si Glass Network for Yb3+-Doped Fibers With Enhanced Photodarkening Stability","authors":"Nilotpal Choudhury,&nbsp;Ranjan Sen,&nbsp;Anirban Dhar","doi":"10.1111/jace.70947","DOIUrl":"https://doi.org/10.1111/jace.70947","url":null,"abstract":"<div>\u0000 \u0000 <p>Yb³⁺-doped fiber lasers are widely used for high-power applications but suffer from photodarkening (PD), limiting long-term performance. We report a novel fabrication approach for alumino-fluorophosphosilicate (AFPS)-based Yb³⁺-doped fibers using the modified chemical vapor deposition–vapor phase chelate delivery (MCVD–VPCD) process. Strategic fluorine co-doping during core deposition suppresses P₂O₅ evaporation, minimizes central dip formation in the refractive index profile, reduces the numerical aperture, and mitigates Yb–Yb pair formation. Optimized preforms with high Yb³⁺ concentration (∼4000 ppm) with nearly 1:1 Al:P ratios resulted in the formation of a stable glass network containing AlPO₄ units, in a repeatable manner without structural distortions. A comparative PD-induced loss analysis revealed that Yb-doped AFPS fibers exhibit ∼5.4-fold and ∼3.5-fold improvement toward long-term stability than conventional Al–Si–Yb fibers and P₂O₅-rich Al–P–Si–Yb fibers, respectively. The overall results highlight AFPS as a robust host glass for high-power laser applications with improved PD resistance.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324808","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":"Compositional and Oxygen-Vacancy Effects on Phase Stability and Electronic Properties in Lanthanide High-Entropy Oxides","authors":"Mary Kathleen Caucci,&nbsp;Billy E. Yang,&nbsp;Gerald R. Bejger,&nbsp;Jacob T. Sivak,&nbsp;Christina M. Rost,&nbsp;Saeed S. I. Almishal,&nbsp;Jon-Paul Maria,&nbsp;Susan B. Sinnott","doi":"10.1111/jace.70946","DOIUrl":"https://doi.org/10.1111/jace.70946","url":null,"abstract":"<p>Cerium-based lanthanide high-entropy oxides (LN-HEOs) are promising candidates for solid-state electrolyte (mass transport) applications due to their ability to accommodate high concentrations of oxygen vacancies while retaining a fluorite-derived structure. However, synthesis often yields undesired ordered oxygen-deficient phases, such as bixbyite, depending on composition and processing conditions. We utilize first-principles density functional theory (DFT) calculations to systematically investigate phase stability in the model system <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 <msub>\u0000 <mi>e</mi>\u0000 <mi>x</mi>\u0000 </msub>\u0000 <msub>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mi>YLaPrSm</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>1</mn>\u0000 <mo>−</mo>\u0000 <mi>x</mi>\u0000 </mrow>\u0000 </msub>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mrow>\u0000 <mn>2</mn>\u0000 <mo>−</mo>\u0000 <mi>δ</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>${mathrm{C}}{{{mathrm{e}}}_x}{{( {{mathrm{YLaPrSm}}} )}_{{mathrm{1}} - x}}{{{mathrm{O}}}_{{mathrm{2}} - delta }}$</annotation>\u0000 </semantics></math>, with the aim of elucidating the thermodynamic factors governing fluorite–bixbyite competition and identifying structure‒property relationships to oxygen transport. By independently varying cerium concentration and oxygen vacancy content, we predict that the transition from disordered fluorite to ordered bixbyite is driven primarily by compositional and vacancy-ordering effects, rather than through changes in cation valence. Free-energy analysis reveals that at high vacancy concentrations, bixbyite is enthalpically favored due to ordered oxygen vacancies, while fluorite is stabilized at lower vacancy concentrations and higher cerium content through configurational entropy of the anion sublattice. These DFT results clarify the competing energetic contributions that control phase stability and structure–valence relationships in LN-HEOs and establishes a mechanistic framework for designing vacancy-tolerant oxide electrolytes with tunable phase behavior.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70946","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148322425","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":"Synergistic Effect of Ladle Furnace Slag and Biomass Bottom Ash in Alkali-Activated Binders","authors":"Miguel A. Gómez-Casero,&nbsp;Pedro Delgado-Plana,&nbsp;Luis Pérez-Villarejo,&nbsp;Dolores Eliche-Quesada","doi":"10.1111/jace.70950","DOIUrl":"https://doi.org/10.1111/jace.70950","url":null,"abstract":"<p>In this study, the co-activation of ladle furnace slag (LFS) with biomass bottom ash (BBA) is proposed as an effective approach to enhance the mechanical performance and microstructural development of alkali-activated binders. Blends containing different LFS/BBA ratios were activated using a potassium-based alkaline solution. Mechanical properties were evaluated up to 90 days. The evolution of reaction products and microstructure was investigated by x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM).</p><p>The results indicate that increasing the BBA content significantly improves the mechanical response, reaching maximum compressive and flexural strength values of 11.1 and 2.9 MPa, respectively, for binders containing 75 wt% BBA. This enhancement is associated with a higher availability of amorphous silica from the BBA, which acts as a chemical buffer that mitigates the potential expansion issues related to the free CaO and MgO present in the LFS. The synergistic interaction between these residues promotes the formation of a stable hybrid (K,C)-A-S-H gel and a more refined pore structure. These findings demonstrate that the co-activation of LFS with BBA is a viable and sustainable route for producing alkali-activated binders, contributing to the high-value recycling of metallurgical and biomass residues within a circular economy framework.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70950","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148322429","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":"Achieving Ultralow Dielectric Loss in ZnZrNb2O8 Ceramics via Local-Ordering Induced by (Cr0.5Nb0.5)4+ Substitution: Mechanism and Application in Medical Imaging Antennas","authors":"Zipeng Huang,&nbsp;Chunmei Chen,&nbsp;Lili Gan,&nbsp;Keying Xue,&nbsp;Lihua Qiao,&nbsp;Ruibin Zhao,&nbsp;Chenru Hao,&nbsp;Li Cheng,&nbsp;Yanru Wu,&nbsp;Haibo Yang,&nbsp;Lei Wang","doi":"10.1111/jace.70957","DOIUrl":"https://doi.org/10.1111/jace.70957","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;Progress in high-sensitivity medical microwave imaging is hindered by the lack of low-loss dielectric materials that can enable highly efficient antenna elements. Here, we propose a material design concept based on the equivalent substitution of Zr&lt;sup&gt;4+&lt;/sup&gt; by the composite ion (Cr&lt;sub&gt;0.5&lt;/sub&gt;Nb&lt;sub&gt;0.5&lt;/sub&gt;)&lt;sup&gt;4+&lt;/sup&gt; in wolframite ZnZrNb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;8&lt;/sub&gt; ceramics, aiming to simultaneously tailor lattice dynamics and bond characteristics to achieve ultralow intrinsic dielectric loss. A series of ZnZr&lt;sub&gt;1-&lt;/sub&gt;&lt;i&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/i&gt;(Cr&lt;sub&gt;0.5&lt;/sub&gt;Nb&lt;sub&gt;0.5&lt;/sub&gt;)&lt;i&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/i&gt;Nb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;8&lt;/sub&gt; (0&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mo&gt;≤&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$ le $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;&lt;i&gt;x&lt;/i&gt;&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mo&gt;≤&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$ le $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;0.09) ceramics were fabricated by a solid-state reaction route. Rietveld analysis confirms the formation of a single-phase solid solution accompanied by systematic lattice contraction. Raman spectroscopy reveals a marked narrowing of the dominant A&lt;sub&gt;g&lt;/sub&gt; mode linewidth (from 51.12 to 38.98 cm&lt;sup&gt;−1&lt;/sup&gt;), which indicates suppressed anharmonic phonon scattering and improved local structural order. Complex chemical bond theory calculations quantitatively attribute this improvement to a progressive reinforcement of the Nb-O bond, reflected in increased bond energy and lattice energy. As a result, at &lt;i&gt;x&lt;/i&gt; = 0.09, the ceramic achieves a remarkable Q &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mo&gt;×&lt;/mo&gt;\u0000 &lt;annotation&gt;$ times $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;&lt;i&gt;f&lt;/i&gt; value of 73,520 GHz—a 20% enhancement over the unsubstituted composition—together with a dielectric constant (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;ε&lt;/mi&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${{varepsilon }_r}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) of 28.31 and a temperature coefficient of resonant frequency (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;τ&lt;/mi&gt;\u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;annotation&gt;${{tau }_f}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) of −48.66 ppm/°C. To demonstrate practical relevance, a cylindrical dielectric resonator antenna was designed and simulated using the optimized composition, showing a peak gain of 4.09 dBi and a radiation efficiency exceeding 98% at 2.72 GHz. This study not only provides a high‑performance material candidate for next‑generation high‑sensitivity medical microwave imaging systems but also e","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148322424","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":"Piezoresistive Self-Sensing 3D-Printed Ceramic Corrugated Trusses Enabled by Embedded Continuous Carbon Fiber Networks","authors":"Yuekai Yan,&nbsp;Zeeshan Ali,&nbsp;Yuntian Fan,&nbsp;Hui Mei,&nbsp;Laifei Cheng,&nbsp;Litong Zhang","doi":"10.1111/jace.70953","DOIUrl":"https://doi.org/10.1111/jace.70953","url":null,"abstract":"<div>\u0000 \u0000 <p>Leveraging the excellent mechanical and piezoresistive properties of continuous carbon fiber (CCF), this study investigated the feasibility of embedding CCF networks into 3D-printed ceramic corrugated trusses for in situ stress sensing and damage detection. The self-sensing characteristics and piezoresistive response of the trusses were systematically evaluated. Results confirm a significant piezoresistive effect, where the electrical resistance changes continuously and consistently with applied load. The sensitivity of resistance to load decreased with the increase of load. The trusses with higher load-bearing capacity exhibited superior sensitivity. The piezoresistive response demonstrated high accuracy, stability, and repeatability, with a rapid response time of approximately 0.12 s. The normalized resistance change (Δ<i>R</i>/<i>R</i>₀) showed synchronous correspondence with variations in both load and sample state during loading. Furthermore, the trusses maintained precise self-sensing performance under complex loading conditions, including alternating incremental loads and multiple cycles with varying amplitudes. These findings indicate that real-time monitoring of resistance changes can effectively reveal the stress state of the truss structures, enabling identification and early warning of incipient damage, thereby demonstrating great potential for integrated structural health monitoring in advanced ceramic components.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148322428","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 Gd Ion Substitution on the Structure and Magnetic Properties of Pulsed Laser–Deposited SrM Hexaferrite Films","authors":"Katherine M. Kelley,&nbsp;Ogheneyunume Fitchorova,&nbsp;Wentao Liang,&nbsp;Jason Adams,&nbsp;Vincent G. Harris","doi":"10.1111/jace.70858","DOIUrl":"https://doi.org/10.1111/jace.70858","url":null,"abstract":"&lt;p&gt;In this work, the influence of gadolinium (Gd) doping on the magnetic and structural properties of strontium M-type hexaferrite films fabricated using pulsed laser deposition (PLD) was systematically investigated. High crystal quality &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;mo&gt;−&lt;/mo&gt;\u0000 &lt;mi&gt;x&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mi&gt;G&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;d&lt;/mi&gt;\u0000 &lt;mi&gt;x&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;e&lt;/mi&gt;\u0000 &lt;mn&gt;12&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;O&lt;/mi&gt;\u0000 &lt;mn&gt;19&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;${mathrm{S}}{{{mathrm{r}}}_{1 - x}}{mathrm{G}}{{{mathrm{d}}}_x}{mathrm{F}}{{{mathrm{e}}}_{12}}{{{mathrm{O}}}_{19}}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; films of ∼820 nm thickness, with &lt;i&gt;x&lt;/i&gt; = 0–0.3, were grown on &lt;i&gt;c&lt;/i&gt;-plane sapphire (0 0 0 1) substrates using an excimer laser with a KrF working gas that provided intense monochromatic 248 nm laser pulses. The fluence of the laser was tailored in pursuit of improving magnetic properties, such as remanence magnetization &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;mi&gt;π&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;M&lt;/mi&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$( {4pi {{M}_{mathrm{r}}}} )$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;, saturation magnetization &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;4&lt;/mn&gt;\u0000 &lt;mi&gt;π&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;M&lt;/mi&gt;\u0000 &lt;mi&gt;s&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;mo&gt;)&lt;/mo&gt;\u0000 &lt;mo&gt;,&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$( {4pi {{M}_{mathrm{s}}}} ),$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; and coercivity &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;(&lt;/mo&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mi&gt;c&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 ","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70858","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148322478","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":"First Sharp Diffraction Peak of Silanol- and Water-Rich Amorphous Silica Synthesized by Stöber Method","authors":"Tomohiro Kyotani,&nbsp;Shinji Kohara","doi":"10.1111/jace.70878","DOIUrl":"https://doi.org/10.1111/jace.70878","url":null,"abstract":"<div>\u0000 \u0000 <p>The structure of silanol- and water-rich amorphous silica is still not well understood. In this study, high-energy x-ray diffraction experiments were conducted on amorphous silica (called sol–gel silica in this study) synthesized by the Stöber method, which consists of the hydrolysis of tetramethoxysilane (TMOS) and subsequent dehydration and condensation processes for silicic acid. The first sharp diffraction peak (FSDP) of the sol–gel silica was compared with that of bulk silica glass, which contains almost no silanol or water. The as-synthesized sol–gel silica sample contains a lot of water owing to a large amount of <i>Q</i>³ units (silanol), such that the density of the sol–gel silica (true specific gravity measured using helium) is low, and the length of intermediate-range structure becomes small owing to the many cleavages of Si─O─Si bonds, resulting in the shift of FSDP to a higher <i>k</i> region. The density of the sol–gel silica increased with heat treatment at 200°C for 5 h under a pressure of 1.56 MPa, but the FSDP shifted to a lower <i>k</i> region and approached that of the bulk silica glass. This is because, as the amount of <i>Q</i>⁴ units increases and Si─O─Si condensation progresses, the density increases, but the length of the intermediate-range structure becomes greater than that of the as-synthesized sample. Furthermore, the height of the small-angle x-ray scattering peak of the sol–gel silica decreased upon heating and approached that of the bulk silica glass. Since it is well known that the FSDP of bulk silica glass shifts to a lower <i>k</i> region with decreasing density, we concluded that the density-dependent behavior of FSDP of the sol–gel silica is different from that of the bulk silica glass.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174879","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":"Atomistic Simulation on Fracture Mechanics of Oxide Glasses and Glass-Ceramics","authors":"Yuxiang Huang,&nbsp;Jun Li,&nbsp;Ling Wang,&nbsp;Qingshuang Zheng,&nbsp;Mustehsin Ali,&nbsp;Honglei Wang,&nbsp;Haizheng Tao,&nbsp;Mao Zhang,&nbsp;Xinyun Wang,&nbsp;Binghui Deng","doi":"10.1111/jace.70853","DOIUrl":"https://doi.org/10.1111/jace.70853","url":null,"abstract":"<div>\u0000 \u0000 <p>Experimental probing of fracture dynamics in oxide glasses and glass-ceramics is remarkably challenging. Whether involving subcritical crack growth, high-speed propagation, or contact damage, these processes occur on either very slow or very fast timescales. As an indispensable tool, molecular dynamics simulations complement experiments by providing unique atomic-scale insight into fracture mechanisms. In this work, we first review the influence of interatomic potentials, simulation protocols, and loading procedures on fracture behavior of glasses, establishing a solid methodological foundation. We then review crack propagation studies ranging from subcritical crack growth to dynamics of high-speed crack propagation, as well as the effect of ion exchange and phase separation–induced structural heterogeneity. Finally, nanoindentation simulations of glasses and glass-ceramics are discussed, with emphasis on factors governing the competition between densification and shear flow, including composition, ion exchange, indenter geometry, and crystalline phases in glass-ceramics.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174876","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":"Mn2+-Doped Perovskite Nanocrystals Embedded in Glass With Green–Red Emissions for Wide-Gamut White Light-Emitting Diodes","authors":"Ming Yang,&nbsp;Yudong Zhang,&nbsp;Wenchao Zhang,&nbsp;Jong Heo,&nbsp;Chao Liu","doi":"10.1111/jace.70877","DOIUrl":"https://doi.org/10.1111/jace.70877","url":null,"abstract":"<div>\u0000 \u0000 <p>We demonstrate tunable green–red dual-band photoluminescence (PL) in glasses containing Mn²⁺-doped CsPbBr₃ nanocrystals (NCs) and evaluate their application in white light-emitting diodes (WLEDs). Green emission from CsPbBr₃ NCs was achieved by controlling the competitive growth between CsPbBr₃ and Cs₄PbBr₆ crystals. Red emission originates from energy transfer from CsPbBr₃ excitons to Mn²⁺ ions. The relative PL intensity ratio of red to green emission (<i>I</i>_Mn​/<i>I</i>_Ex​) reached values as high as 7.19, while the maximum photoluminescence quantum yield (PLQY) was 44 ± 1% following heat treatment at 560°C for 15 h. The glass exhibited excellent spectral stability at 175°C and after immersion in water for 30 days. A prototype WLED fabricated using a monolithic glass plate and a 450 nm blue LED chip produced high-quality white light with CIE coordinates of (0.338, 0.324) and a wide color gamut. The color converter also showed excellent photostability, retaining ∼90% of its initial luminous efficacy after 100 h of operation. These results highlight the strong potential of Mn²⁺-doped perovskite NC glasses for practical WLED applications.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174877","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":"Second Optical Harmonic Coherence in Electric-Field Assisted Ion-Exchanged Glass","authors":"Gennadiy Kan,&nbsp;Sergey A. Scherbak,&nbsp;Zhihao Cui,&nbsp;Aleksey N. Terpitskiy,&nbsp;Guang Yang,&nbsp;Andrey A. Lipovskii","doi":"10.1111/jace.70872","DOIUrl":"https://doi.org/10.1111/jace.70872","url":null,"abstract":"<div>\u0000 \u0000 <p>The study explores second optical harmonic generation (SHG) in soda-lime glass subsurface regions enriched with K⁺ ions via field-assisted potassium-to-sodium ion exchange. These regions develop a spatially nonuniform second-order optical nonlinearity, attributed to the Maxwell-Wagner (MW) effect and electric-field-induced second harmonic (EFISH) phenomena. We analyzed phase retardation behavior along nonlinear interaction lengths both shorter than and marginally exceeding the SHG coherence length. Analytical expressions derived for quadratic nonlinearity induced by MW E-field were confirmed in SHG experiments. We demonstrated that there is an optimal thickness of the K-rich layer (∼10 µm) providing maximal second harmonic output, while in thicker layers SHG is suppressed by both phase-mismatch and decrease of MW E-field in a thick K-rich layer. The resulting principles are applicable to SHG in thick films or structures (with thicknesses comparable to the coherence length) that exhibit inhomogeneous optical nonlinearity.</p>\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174659","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}