Journal of the American Ceramic Society最新文献

Nd3+-Modified KNN-Based Ceramics With Coupled Optical and Piezoelectric Properties 具有光学和压电耦合性能的Nd3+改性knn基陶瓷

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-30 DOI: 10.1111/jace.71361

Shiqiang Wang, Gaochao Zhao, Funing Dong, Lei Xie, Zhanpeng Wang, Tao He, Xu Zhang, Ruidong Yue, Liping Gao, Lihua Yin, Jie Yang, Yuping Sun

{"title":"Nd3+-Modified KNN-Based Ceramics With Coupled Optical and Piezoelectric Properties","authors":"Shiqiang Wang, Gaochao Zhao, Funing Dong, Lei Xie, Zhanpeng Wang, Tao He, Xu Zhang, Ruidong Yue, Liping Gao, Lihua Yin, Jie Yang, Yuping Sun","doi":"10.1111/jace.71361","DOIUrl":"https://doi.org/10.1111/jace.71361","url":null,"abstract":"<div>\u0000 \u0000 Transparent lead-free piezoelectric ceramics are promising for multifunctional optoelectronic devices. However, the simultaneous realization of high optical transparency, piezoelectricity, and light-tunable luminescence remains challenging. In this study, Nd3+-modified 0.94(K0.5Na0.5)1−3xNdxNbO3–0.06Sr(Zn1/3Nb2/3)O3 ceramics were designed to regulate phase structure, microstructure, defect chemistry, and optical−electrical coupling. Nd3+ doping has shown to drive the structural evolution from a tetragonal-dominated phase toward a tetragonal and cubic coexist phase, while regulating grain growth and enhancing densification. The optimized composition with x = 0.01 exhibits a high relative density of 99.7%, refined grains, an optical transmittance of 67.26% at 780 nm, and an enlarged optical bandgap of 3.02 eV. Meanwhile, characteristic Nd3+ upconversion emissions are observed under 808 nm excitation, and both transmittance and upconversion photoluminescence can be modulated by 365 nm light irradiation. This photochromic-induced luminescence quenching is attributed to the presence of light-triggered color centers, which are often associated with various types of defects including alkali vacancies, oxygen vacancies, and dopant-related defects. Benefiting from the balanced pseudo-cubic structure, dense microstructure, enhanced dielectric response, and retained ferroelectric polarization, the x = 0.01 ceramic achieves a maximum piezoelectric coefficient of 136 pC/N. This work provides an effective strategy for integrating transparency, piezoelectricity, upconversion photoluminescence, and photochromic modulation in lead-free KNN-based ceramics.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356932","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}

引用次数: 0

Multiscale Reinforcement Strategies in Geopolymers: From Fiber and Nanomaterial Modification to Synergistic Enhancement 地聚合物的多尺度增强策略：从纤维和纳米材料改性到协同增强

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71348

Zhenzhen Jiao, Qi Zhang, Yiqi Wang, Zhixiong Lu, Guofeng Xue, Huanming Zhang, Ruyi Yan, Xiang Tian

{"title":"Multiscale Reinforcement Strategies in Geopolymers: From Fiber and Nanomaterial Modification to Synergistic Enhancement","authors":"Zhenzhen Jiao, Qi Zhang, Yiqi Wang, Zhixiong Lu, Guofeng Xue, Huanming Zhang, Ruyi Yan, Xiang Tian","doi":"10.1111/jace.71348","DOIUrl":"https://doi.org/10.1111/jace.71348","url":null,"abstract":"<div>\u0000 \u0000 Geopolymers are promising low-carbon alternatives to Portland cement; however, their inherent brittleness, shrinkage, limited toughness, and workability constraints hinder their broader structural application. Based on a structured Web of Science literature search and keyword co-occurrence analysis, this review critically examines multiscale reinforcement strategies for geopolymer composites using fibers, nanomaterials, and fiber–nanomaterial hybrid systems. The effects of steel, inorganic, synthetic, natural, and hybrid fibers on fresh-state behavior, mechanical properties, durability, high-temperature resistance, and interfacial performance are systematically evaluated. The contributions of nanomaterials, including nano-SiO2, nano-Al2O3, and nano-TiO2, to geopolymerization kinetics, pore refinement, matrix densification, and interfacial enhancement are also discussed. Particular attention is given to the synergistic mechanisms of fiber–nanomaterial hybrid systems, including crack bridging and deflection, load transfer across multiple length scales, interfacial modification, and hierarchical microstructural densification. Despite considerable progress, several challenges remain, including nanoparticle agglomeration and fiber dispersion, high material costs, uncertain long-term durability, insufficient quantitative understanding of cross-scale interactions, and the lack of standardized evaluation methods. Future research should focus on mechanism-based material design, interfacial control, long-term performance validation, and standardized characterization protocols to facilitate the development of high-performance, durable, and sustainable geopolymer composites.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356846","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}

引用次数: 0

Microwave Absorption Properties of Carbon Black/Silica Sol Dual-Component Modified SiC Fiber Felt 炭黑/硅溶胶双组份改性SiC纤维毡的微波吸收性能

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71350

Wenmin Xue, Hongfeng Yin, Ying Wei, Yun Tang, Xiaohu Ren, Hudie Yuan

{"title":"Microwave Absorption Properties of Carbon Black/Silica Sol Dual-Component Modified SiC Fiber Felt","authors":"Wenmin Xue, Hongfeng Yin, Ying Wei, Yun Tang, Xiaohu Ren, Hudie Yuan","doi":"10.1111/jace.71350","DOIUrl":"https://doi.org/10.1111/jace.71350","url":null,"abstract":"<div>\u0000 \u0000 Due to their low density, high-temperature resistance, and tunable electrical resistivity, SiC fibers have shown great potential as promising microwave absorption (MA) materials. However, the poor impedance matching and limited electromagnetic loss mechanisms of intrinsic SiC fibers result in a relatively narrow effective absorption bandwidth, thereby limiting their practical applications. Based on a strategy for synergistic multiple loss mechanisms, SiO2/carbon‑black modified Ni–SiC (SiO2/CB/Ni–SiC) composites were fabricated via an electrospinning-vacuum impregnation-drying process. Conductive carbon black and low-dielectric SiO2 layers were coated onto the Ni–SiC fiber skeleton, significantly improving the electromagnetic wave (EMW) absorption capacity of fiber felts. The optimal loadings of CB and silica were 12 wt.% and 8%, respectively. Benefiting from the optimized impedance matching induced by SiO2, the SiO2/CB/Ni–SiC fiber felt exhibited a maximum effective absorption bandwidth (EABmax) of 7.68 GHz (10.32–18 GHz) at a thickness of 2.5 mm, along with a minimum reflection loss (RLmin) of −51.56 dB at 8.48 GHz, which demonstrates superior EMW absorption performance. Therefore, a simple, low-cost approach to enhancing the absorption performance of SiC fiber felt has been identified.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356512","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}

引用次数: 0

Crystallization Kinetics of LAS Glass-Ceramics With an SnO2–TiO2–ZrO2 Nucleating System by In Situ Microscopy 原位显微镜下SnO2-TiO2-ZrO2成核体系LAS微晶玻璃的结晶动力学

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71356

Aokai Zhang, Wentong Yang, Jianpu Li, Xiang Meng, Xiaolong Yu, Changjiu Li, Zhe Wang

{"title":"Crystallization Kinetics of LAS Glass-Ceramics With an SnO2–TiO2–ZrO2 Nucleating System by In Situ Microscopy","authors":"Aokai Zhang, Wentong Yang, Jianpu Li, Xiang Meng, Xiaolong Yu, Changjiu Li, Zhe Wang","doi":"10.1111/jace.71356","DOIUrl":"https://doi.org/10.1111/jace.71356","url":null,"abstract":"<div>\u0000 \u0000 Precise control of crystallization kinetics is crucial for tailoring the microstructure and properties of transparent Li2O–Al2O3–SiO2 (LAS) glass-ceramics. In this work, the crystallization behavior of LAS glasses was systematically investigated by progressively replacing TiO2 with SnO2 within a standard Ti–Zr system, maintaining a constant total nucleating agent content. By integrating in situ spectroscopy with hot-stage microscopy, real-time time-temperature-transformation (TTT) curves were constructed, enabling precise characterization of crystallization kinetics and overcoming the limitations of conventional “black-box” thermal analysis. Structurally, Raman spectroscopy revealed that SnO2 substitution drives network repolymerization, transitioning from Q2 to Q3/Q4 species. To overcome the kinetic hindrance of this rigidified network, a thermodynamic-kinetic dual synergy governed by the Sn4+/Sn2+ equilibrium is activated. Thermodynamically, Sn4+ expands the precursor lattice to lower nucleation barriers, while kinetically, Sn2+ acts as a local modifier to enhance atomic mobility. Consequently, the optimized composition (1.5 mol% SnO2) exhibits the most favorable kinetics, with the induction period shortened to 107 s and the onset temperature lowered by 50°C compared to the Sn-free reference. This optimal synergy promotes intense site-saturated nucleation, significantly refining the quartz solid solution crystallites from 68 to 30 nm. Ultimately, guided by these elucidated mechanisms, an optimized heat treatment regimen was established, providing an effective pathway for preparing high-performance nanostructured glass-ceramics.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356843","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}

引用次数: 0

In Situ Dense Interfacial Barrier via Tailored CA6 Gradation and Si Doping for Durable Li-Ion Battery Saggars 基于定制CA6级配和Si掺杂的原位致密界面势垒用于耐用锂离子电池Saggars

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71338

Xiulin Shen, Junchi Weng, Zhenfei Lv, Junyi Qi, Shenglong Xie, Yao Wang, Mengke Fan, Xuejia Zhang, Xu Lu, Qingping Wang, Zhaohui Huang

{"title":"In Situ Dense Interfacial Barrier via Tailored CA6 Gradation and Si Doping for Durable Li-Ion Battery Saggars","authors":"Xiulin Shen, Junchi Weng, Zhenfei Lv, Junyi Qi, Shenglong Xie, Yao Wang, Mengke Fan, Xuejia Zhang, Xu Lu, Qingping Wang, Zhaohui Huang","doi":"10.1111/jace.71338","DOIUrl":"https://doi.org/10.1111/jace.71338","url":null,"abstract":"<div>\u0000 \u0000 Severe saggar corrosion by cathode materials hinders the sustainable production of lithium-ion batteries. Herein, high-performance refractory saggars were fabricated via high-temperature reconstruction using waste high-voltage porcelain insulators as the main raw material, combined with other solid wastes and mineral additives to form a dense mullite–corundum matrix. A physical–chemical synergistic strategy was adopted by optimizing calcium hexa-aluminate (CA6) particle-size gradation and Si powder addition. At an optimal coarse-to-fine CA6 ratio of 5:15, a stable interlocking skeleton was formed, reducing open pores and enhancing matrix packing density. Meanwhile, 2 wt% Si enabled in situ modification through oxidation-derived liquid SiO2 filling and mullitization-induced micro-expansion, effectively sealing residual micro- and nanoscale pores. Consequently, the apparent porosity decreased below 1% while maintaining high mechanical strength and thermal shock resistance. During service, the refined matrix forms a liquid–solid double interfacial barrier: high-viscosity lithium silicate glass immobilizes Li+, while a compact β-eucryptite layer blocks Li2O inward diffusion. This work offers a low-cost route for long-life refractory saggars and high-value solid-waste utilization.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356845","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}

引用次数: 0

In-Situ Plate-Like Calcium Hexaluminate (CA6) Reinforcement in Al2O3 Composites From Particle-Stabilized Foam 原位板状六铝酸钙（CA6）增强Al2O3复合材料的颗粒稳定泡沫

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71353

Pengfei Chen, Jianli Qiao, Zhe Chen, Shihui Zhao, Zun Xia, Jinglong Yang

{"title":"In-Situ Plate-Like Calcium Hexaluminate (CA6) Reinforcement in Al2O3 Composites From Particle-Stabilized Foam","authors":"Pengfei Chen, Jianli Qiao, Zhe Chen, Shihui Zhao, Zun Xia, Jinglong Yang","doi":"10.1111/jace.71353","DOIUrl":"https://doi.org/10.1111/jace.71353","url":null,"abstract":"<div>\u0000 \u0000 High-performance Al2O3/CA6 composite ceramics with tailored microstructure were successfully fabricated via foam-structured, precursor-derived ceramic technology combined with hot pressing. Different from conventional sintering routes, this foam-derived strategy enables effective impurity purification and uniform dispersion of CaCO3 precursors, which significantly regulates the phase composition and grain microstructure of composites. During pre-sintering, the in-situ decomposition of CaCO3 promotes the growth of plate-like CA6 grains, and numerous high-density dislocations and stacking faults generated within CA6 grains further optimize the local microstructure. The doping of trace Ca (1.00 at.%) effectively restrains abnormal grain growth and brittle phase formation, achieving a ∼30% enhancement in flexural strength compared with pure Al2O3 and conventional, sintered Al2O3/CA6 composites. Benefiting from multiple toughening mechanisms of crack deflection and crack bridging originating from the high-aspect-ratio CA6 platelets with weak (001) plane bonding, the 2.00 at.% Ca-doped composite obtains an optimal fracture toughness of 7.25 MPa·m1/2. Calculated thermal shock resistance indices reveal an improved R value, while R'''' evolves non-monotonically with increasing Ca content. This work demonstrates that the foam precursor strategy combined with trace Ca doping is a feasible and efficient route to fabricate high-strength and high-toughness alumina-based structural ceramics.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356849","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}

引用次数: 0

Thermal Stability and Environmental Degradation of YB2C2 Ceramics YB2C2陶瓷的热稳定性和环境降解

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71363

Van-Quyet Nguyen, Jun-Seop Kim, Hyunwoong Seo, Sea-Hoon Lee

{"title":"Thermal Stability and Environmental Degradation of YB2C2 Ceramics","authors":"Van-Quyet Nguyen, Jun-Seop Kim, Hyunwoong Seo, Sea-Hoon Lee","doi":"10.1111/jace.71363","DOIUrl":"https://doi.org/10.1111/jace.71363","url":null,"abstract":"<div>\u0000 \u0000 This study investigates the melting, oxidation, and ambient moisture-induced corrosion behaviors of high-purity yttrium borocarbide (YB2C2) ceramics. The YB2C2 ceramic exhibited decomposition and melting behaviors at approximately 2100°C under low-vacuum conditions (below 20 Pa). Thermogravimetric (TG) analysis performed between 40°C and 1400°C in air, combined with x-ray diffraction (XRD) analysis, confirmed that the significant oxidation of sintered YB2C2 initiates above 810°C. This process leads to the extensive phase transformation into YBO3, B2O3, and Y2O3 after the thermal cycle. Furthermore, the sintered YB2C2 was observed to react with atmospheric moisture under ambient conditions, disintegrating into a fine powder while forming amorphous yttrium and boron hydroxide species. The resulting morphology and crystalline structure of these hydro-corroded products differed significantly from those of the oxidation products. The underlying mechanisms for the oxidation and ambient moisture corrosion were systematically analyzed. These findings indicate that YB2C2 ceramics may require robust environmental barrier coatings (EBCs) or other protective strategies for practical applications in oxygen- or moisture-containing environments.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356858","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}

引用次数: 0

Shear Response and Local Structural Evolution of Through-Glass Vias (TGVs) in Borosilicate Glasses: A Molecular Dynamics Study 硼硅酸盐玻璃中玻璃通孔（TGVs）的剪切响应和局部结构演化：分子动力学研究

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71346

Xiao Hu, Ziming Yan, Shuang Liu, Linfeng Ding, Lianjun Wang

{"title":"Shear Response and Local Structural Evolution of Through-Glass Vias (TGVs) in Borosilicate Glasses: A Molecular Dynamics Study","authors":"Xiao Hu, Ziming Yan, Shuang Liu, Linfeng Ding, Lianjun Wang","doi":"10.1111/jace.71346","DOIUrl":"https://doi.org/10.1111/jace.71346","url":null,"abstract":"<div>\u0000 \u0000 Through-glass vias (TGVs) are critical to high-density three-dimensional interconnects for advanced glass packaging; however, the local structural response of vias to mechanical loading remains poorly understood. Here, we employ molecular dynamics simulations to investigate the shear behavior and structural evolution of two commercial borosilicate glasses, SCHOTT Borofloat 33 and N-BK7, comparing bulk and TGV configurations. The introduction of TGVs markedly reduces the shear strength of both glasses, narrows the modulus gap between them, and reverses their shear-modulus ranking, while simultaneously amplifying the spatial heterogeneity of local deformation. Structural analysis indicates that shear loading does not globally reconstruct the glass network; rather, it enhances short-range structural fluctuations and induces limited medium-range topological rearrangements. At the TGV scale, the nonbridging oxygen content increases and the Si-Q4 fraction decreases, reflecting reduced network connectivity, whereas changes in B4 species point to selective rearrangement of the local BO4 environment. Decomposition of Si-Qn and B-Qn species, combined with ring-structure analysis, reveals that the B–O network is preferentially sensitive to both via introduction and shear perturbation relative to the Si–O network. This behavior highlights a selective role of B–O units in accommodating medium-range structural rearrangements in borosilicate glasses. Collectively, these findings provide atomic-scale insight into the shear reliability of borosilicate TGVs and their local structural accommodation mechanisms.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356511","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}

引用次数: 0

Dual-Mode Optical Temperature Sensing of Mg0.75Al2.16O4: Cr3+/Er3+ Transparent Ceramic With Spatial Separation Structure 具有空间分离结构的Mg0.75Al2.16O4: Cr3+/Er3+透明陶瓷的双模光学温度传感

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71343

Bowen Chen, Min Ni, Chunbo Dai, Hao Wang, Bingtian Tu, Weimin Wang, Zhengyi Fu

{"title":"Dual-Mode Optical Temperature Sensing of Mg0.75Al2.16O4: Cr3+/Er3+ Transparent Ceramic With Spatial Separation Structure","authors":"Bowen Chen, Min Ni, Chunbo Dai, Hao Wang, Bingtian Tu, Weimin Wang, Zhengyi Fu","doi":"10.1111/jace.71343","DOIUrl":"https://doi.org/10.1111/jace.71343","url":null,"abstract":"<div>\u0000 \u0000 Designing the energy transfer process between activator ions is an effective strategy for achieving multimodal, high-sensitivity fluorescent temperature sensing. Herein, a dual-mode fluorescent temperature sensor was developed based on the Mg0.75Al2.16O4: 0.1at%Cr3+/0.03at%Er3+ transparent ceramic. Spatial separation of Cr3+/Er3+ ions was achieved by utilizing both the lattice and grain boundary environments within the transparent ceramic. Within this unique structure, efficient energy transfer from Er3+ to Cr3+ was established. As a result, Cr3+ emitted near-infrared upconversion fluorescence peaking at 797 nm (4T2 level) under 980 nm laser excitation. The downconversion fluorescence lifetime of Cr3+ and the upconversion fluorescence intensity ratio of Cr3+/Er3+ can serve as temperature sensing signals. Within the range of 300–573 K, the maximum relative sensitivity reached 4.2% K−1. This work demonstrates the potential for designing functional ionic spatial structures within transparent ceramics.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356513","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}

引用次数: 0

Rheological Properties Analysis of Recycled Powder-Modified 3D Printing Mortar 再生粉体改性3D打印砂浆流变特性分析

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-10-28 DOI: 10.1111/jace.71366

Changqing Wang, Lujie Lv

{"title":"Rheological Properties Analysis of Recycled Powder-Modified 3D Printing Mortar","authors":"Changqing Wang, Lujie Lv","doi":"10.1111/jace.71366","DOIUrl":"https://doi.org/10.1111/jace.71366","url":null,"abstract":"<div>\u0000 \u0000 Recycled concrete powder can substitute for part of the cement in 3D-printable mortar, but the accompanying changes in fresh-state resistance must be assessed together with deposition behavior and hardened performance. Mortar containing fully recycled fine aggregate and recycled powder (RP) was investigated. Cement was replaced by RP at 0%–50% by mass, with a nominal net-water-to-total-powder ratio of 0.42 and a fixed additional water dose for recycled fine aggregate. This batching ratio does not imply constant free-water availability because RP water demand was not independently measured. Static and dynamic yield responses, plastic viscosity, shear-history-dependent hysteresis, and five-layer deposition were examined over 0%–50%; compressive response and reported CT pore fractions were assessed over 0%–30%. From 0% to 50% RP, the reported equivalent dynamic yield stress increased from 434.16 to 825.65 Pa (+90.2%) and plastic viscosity increased from 8.52 to 18.41 Pa·s (+116.1%). Peak compressive stress decreased from 13.187 to 8.452 MPa at 30% RP (−35.9%), while the segmented CT pore-volume fraction increased from 9.19% to 20.14% in the examined specimens. Representative CT images at 0% and 20% RP indicated more clustered pore features at 20%. These associations are consistent with combined cement dilution, changing water availability, and deposition-related defect retention; their individual contributions were not isolated. The empirical relations describe the investigated mixtures and do not establish recovery kinetics, pore connectivity, interlayer strength, or a universal printing threshold. At 30% replacement, 185.63 kg/m3 of cement was displaced, demonstrating a resource-substitution benefit that must be balanced against the measured strength loss.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 11","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356514","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}

引用次数: 0