Journal of the American Ceramic Society最新文献_第2页

Carbon Infused Aluminum Made by Flash: Higher Conductivity and Near Zero Creep 闪蒸铝：高导电性和近零蠕变

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-25 DOI: 10.1111/jace.71276

Suprabha Das, Gowtham Bhogavalli, Rishi Raj

{"title":"Carbon Infused Aluminum Made by Flash: Higher Conductivity and Near Zero Creep","authors":"Suprabha Das, Gowtham Bhogavalli, Rishi Raj","doi":"10.1111/jace.71276","DOIUrl":"https://doi.org/10.1111/jace.71276","url":null,"abstract":"<div>\u0000 \u0000 Three-wire braids of pure aluminum were coated with ordinary carbon and flashed. Like the earlier experiments on copper, the aluminum braids show up to 20% increase in conductivity and near zero creep rate at temperatures close to the melting point. Like copper, the braids retained their shape when the temperature was increase to 900°C, 240°C above the melting point (nominally pure aluminum braid placed alongside curled up into a shapeless form). Similar results that were obtained in graphene infused copperwere explained by the evolution of a nanodomain network of predominantly sp2 carbon that which imaged by atom-probe tomography and Raman. The Raman from the aluminum braids is exactly similar to that obtained for carbon-infused copper. We rely on the high similarity of properties, and the Raman spectra, to infer that the aluminum wires too became infused with predominantly sp2 networks of carbon. In copper, these networks were shown to form domains in the form of rings about 2 nm in diameter. The high creep resistance means that aluminum transmission lines can be assembled without reinforcing cables that are deployed to prevent creep-induced sag in cables made from nominally pure aluminum. The higher conductivity is an additional plus since it will reduce resistive losses. These experiments taken together raise the possibility that carbon networks can be infused generally into metals for the purpose of increasing their conductivity. Possible applications also include ceramics where the cathodes in lithium ion batteries and fuel cells are required to have mixed ionic and electronic conductivity.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048456","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

Strengthened Glass Network Reduces Ru Dissolution in Calcium Aluminosilicate Glasses 强化玻璃网减少铝硅酸钙玻璃中钌的溶解

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-24 DOI: 10.1111/jace.71270

Wenfeng Song, Chenchen Niu, Donald B. Dingwell, Hanyu Hu, Wei Deng, Hongming Lei, Michael Ojovan, Kai Xu

{"title":"Strengthened Glass Network Reduces Ru Dissolution in Calcium Aluminosilicate Glasses","authors":"Wenfeng Song, Chenchen Niu, Donald B. Dingwell, Hanyu Hu, Wei Deng, Hongming Lei, Michael Ojovan, Kai Xu","doi":"10.1111/jace.71270","DOIUrl":"https://doi.org/10.1111/jace.71270","url":null,"abstract":"<div>\u0000 \u0000 Ruthenium (Ru), a platinum-group element produced in considerable amounts during nuclear fuel reprocessing, shows extremely low solubility in silicate melts. Consequently, ruthenium oxide precipitation can cause operational instability during vitrification. To clarify the structural origin of the solubility limits of Ru, the dissolution behavior of Ru in CaO–Al2O3–SiO2 (CAS) glass melts with different Al2O3/SiO2 (A/S) mole ratios (A/S = 0.05–0.18) was investigated. Dissolved Ru contents were measured by inductively coupled plasma mass spectrometry (ICP–MS), and the structural evolution of the glass network was examined using Raman, FTIR, 27Al MAS, and MQMAS NMR spectroscopies. UV–Vis spectroscopy and density functional theory (DFT) simulations were used to examine the oxidation state and local coordination environment of dissolved Ru, respectively. Increasing the A/S ratio from 0.05 to 0.18 resulted in a systematic reduction in dissolved Ru content. This decline was related to clear structural modifications within the glass network. With increasing A/S ratio, the structural replacement of Si4+ by Al3+ was achieved through the incorporation of [AlO4] units into the network (from 0.03 to 0.08 mole fraction), whereas the content of [AlO5] units remained nearly unchanged (∼0.004 ± 0.002 molfraction), promoting stronger cross-linking between [AlO4] and [SiO4], stabilized by Ca2+ cations acting as charge compensators. This decreased the concentration of non-bridging oxygens (NBO) and reduced the availability of Ca2+ for the stabilization of Ru (mainly [RuO4]), thereby markedly suppressing the dissolved Ru content in these glass melts.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048158","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

Highly Efficient and Thermally Stable Red-Emitting Glass Ceramics by Induced Self-Reduction for Laser Lighting 激光照明用诱导自还原法制备高效热稳定发红玻璃陶瓷

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-24 DOI: 10.1111/jace.71231

Hang Chen, Yijei Li, Chunming Zhou, Xu Chen, Jian Kang, Yuhua Wang, Daqin Chen, Robert Tomala, Wieslaw Strek, Farida A. Selim, Hao Chen, Le Zhang

{"title":"Highly Efficient and Thermally Stable Red-Emitting Glass Ceramics by Induced Self-Reduction for Laser Lighting","authors":"Hang Chen, Yijei Li, Chunming Zhou, Xu Chen, Jian Kang, Yuhua Wang, Daqin Chen, Robert Tomala, Wieslaw Strek, Farida A. Selim, Hao Chen, Le Zhang","doi":"10.1111/jace.71231","DOIUrl":"https://doi.org/10.1111/jace.71231","url":null,"abstract":"<div>\u0000 \u0000 Phosphor-converted white laser diodes (pc-wLDs) are evolving to achieve higher color rendering index (Ra), appropriate correlated color temperature (CCT), and higher power. However, challenges, including the absence of red spectral components and significant heat accumulation in converters, remain significant obstacles. In this work, an appealing red-emitting Mg2Al4Si5O18:Eu (MASE) cordierite glass–ceramic (GCs) bulks are prepared for the first time under an air atmosphere, employing the glass crystallization method. Impressively, through optimizing the crystallization temperature and duration, the MASE GCs demonstrate remarkable thermal stability, maintaining 101% of their room temperature emission intensity even at 423 K and exhibiting high saturation thresholds exceeding 32.94 W/mm2, coupled with a high quantum yield (QY) of 75.1%. Meanwhile, the self-reduction and crystallization mechanisms of MASE GCs are systematically investigated. Moreover, powered by a 7.77 W/mm2 blue laser, the reflective white LDs device (LuAG:Ce/MASE composite device), encapsulated with stacked LuAG:Ce ceramics and MASE GCs, produced high-quality warm white light with a high Ra of 92.9, a low CCT of 3370 K, and an exceptional QY of 84.7%. This work demonstrates that utilizing the self-reduction reaction to prepare the high thermal stability red-emitting phosphor material is an economical, efficient, and innovative approach, offering promising potential applications in next-generation pc-wLDs.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048092","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

Mechanisms Governing Rapid Stiffening and Subsequent Structuring in Sodium Carbonate-Activated Glass Cullet Powder 碳酸钠活化玻璃碎粉快速硬化和后续结构的机理

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-24 DOI: 10.1111/jace.71269

Louise Lemesre, Rachida Idir, Martin Cyr

{"title":"Mechanisms Governing Rapid Stiffening and Subsequent Structuring in Sodium Carbonate-Activated Glass Cullet Powder","authors":"Louise Lemesre, Rachida Idir, Martin Cyr","doi":"10.1111/jace.71269","DOIUrl":"https://doi.org/10.1111/jace.71269","url":null,"abstract":"<div>\u0000 \u0000 This study investigates the mechanisms governing rapid stiffening and subsequent structuring in sodium carbonate (Na2CO3)-activated glass cullet powder. Pastes containing 5, 10, 15, or 25 wt% Na2CO3 were monitored from the first minutes after mixing to 28 days by ultrasonic wave propagation, in situ and ex situ x-ray diffraction, isothermal calorimetry, thermogravimetric analysis, and compressive strength testing. High Na2CO3 contents caused stiffening within minutes, together with a sharp increase in ultrasonic velocity, intense early heat release, and precipitation of hydrated Na2CO3 phases. These results show that initial stiffening is primarily associated with carbonate dissolution, hydration, and precipitation, rather than with glass dissolution. At 10 and 15 wt% Na2CO3, a transient decrease in ultrasonic velocity followed the initial structuring stage and occurred over the same period as the progressive disappearance of thermonatrite, consistent with a temporary microstructural rearrangement. By contrast, the 5 and 25 wt% systems showed more continuous structural development. At later ages, strength gain was associated with progressive glass reaction and formation of gaylussite and poorly crystalline or amorphous binding phases. The results distinguish two coupled mechanisms: rapid carbonate-phase evolution associated with early stiffening, and delayed glass reaction associated with subsequent hardening. This mechanistic separation clarifies the phase–structure–property relationships in Na2CO3-activated recycled glass binders.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149048093","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

Combustion Synthesis of Na α-SiAlON Powders Na α-SiAlON粉末的燃烧合成

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-23 DOI: 10.1111/jace.71260

Bohan Wang, Dengke Zhao, Shijia Zhang, Zhiheng Ma, Shuo Zhao, Kexin Chen, Guanghua Liu

{"title":"Combustion Synthesis of Na α-SiAlON Powders","authors":"Bohan Wang, Dengke Zhao, Shijia Zhang, Zhiheng Ma, Shuo Zhao, Kexin Chen, Guanghua Liu","doi":"10.1111/jace.71260","DOIUrl":"https://doi.org/10.1111/jace.71260","url":null,"abstract":"<div>\u0000 \u0000 α-SiAlON, as a solid solution of α-Si3N4, exhibits excellent mechanical properties, making it attractive for structural applications at both room and elevated temperatures. α-SiAlON ceramics stabilized by Li, Mg, Ca, Y, Mn, and rare-earth cations have been extensively investigated. In contrast, Na-stabilized α-SiAlON has received little attention, and the synthesis of single-phase Na α-SiAlON has not yet been reported. In this work, nearly single-phase Na α-SiAlON powders were prepared by combustion synthesis for the first time. The effects of starting composition and α-Si3N4 diluent content on the phase composition and microstructure of the synthesized products were systematically investigated. Increasing the m and n values promoted the formation of α-SiAlON and suppressed the formation of β-SiAlON. The α-Si3N4 diluent content strongly influenced the phase evolution and microstructure of the products. Nearly single-phase Na α-SiAlON powders were obtained at an appropriate α-Si3N4 diluent content. The Na α-SiAlON powders mainly consisted of rod-like and equiaxed grains. Based on the experimental results, a dual-pathway formation mechanism was proposed, involving the direct precipitation of α-SiAlON crystal from a supersaturated Na–Si–Al–O–N liquid phase and heterogeneous nucleation on undissolved α-Si3N4 particles. This work establishes combustion synthesis as an effective route for the preparation of high-purity Na α-SiAlON powders and advances the understanding of their formation mechanisms.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029096","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

Sunlight-Excitable K3YSi2O7: Ce3+ Green Persistent Luminescence Material for Anti-Counterfeiting and pc-WLEDs 日光可激K3YSi2O7: Ce3+绿色持久发光材料，用于防伪和pc- wled

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-23 DOI: 10.1111/jace.71274

Sihan Yang, Ziying Wang, Jian He, Xuejiao Wang, Qi Zhu, Ji-Guang Li

{"title":"Sunlight-Excitable K3YSi2O7: Ce3+ Green Persistent Luminescence Material for Anti-Counterfeiting and pc-WLEDs","authors":"Sihan Yang, Ziying Wang, Jian He, Xuejiao Wang, Qi Zhu, Ji-Guang Li","doi":"10.1111/jace.71274","DOIUrl":"https://doi.org/10.1111/jace.71274","url":null,"abstract":"<div>\u0000 \u0000 Persistent luminescence (PersL) materials have been extensively studied owing to their excellent optical properties. However, their practical applications are restricted by the fact that they can only be charged by a single light source. Consequently, materials capable of PersL under natural light irradiation have attracted considerable attention due to their potential for reducing energy consumption. Nevertheless, the design and development of efficient PersL materials activated by sunlight remains a challenging task. To address this issue, a novel K3YSi2O7: Ce3+ phosphor with the P63/mcm space group was successfully synthesized. The results reveal that this material exhibits significant excitation wavelength-dependent luminescence characteristics. By varying the excitation wavelength, the relative emission efficiencies of the two luminescence centers—the intrinsic host emission and the 5d-4f transition of Ce3+—can be effectively modulated, enabling continuous tuning of the emission color from bluish-white to green. Meanwhile, the material can be efficiently excited by both UV light and sunlight, generating excellent green PersL (with PersL lifetimes exceeding 2 and 1 h, respectively), which is attributed to the trapping and release of charge carriers by oxygen vacancy defects in the lattice. A pc-WLED fabricated using this phosphor successfully fills the cyan gap and achieves a high Ra of 94.6. Furthermore, the as-prepared K3YSi2O7: Ce3+/PDMS composite flexible film further demonstrates the potential application of this material in the field of optical anti-counterfeiting.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029102","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

Volatilization of Na2O and Its Impact on the Processing of Solid Electrolytes Na2O的挥发及其对固体电解质加工的影响

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-23 DOI: 10.1111/jace.71236

Frank Tietz, Marie-Theres Gerhards, Monika Bhardwaj, Doris Sebold

{"title":"Volatilization of Na2O and Its Impact on the Processing of Solid Electrolytes","authors":"Frank Tietz, Marie-Theres Gerhards, Monika Bhardwaj, Doris Sebold","doi":"10.1111/jace.71236","DOIUrl":"https://doi.org/10.1111/jace.71236","url":null,"abstract":"This study explores the volatilization of Na2O from selected solid and liquid materials, especially from a Na+ superionic conductor (NaSICON) with the composition Na3.4Zr2Si2.4P0.6O12, with the aim of addressing the often arbitrarily chosen amount of additional sodium source used to compensate for mass loss during sintering. The measured and calculated mass losses allow for a more precise estimate of the necessary Na2O additions during component manufacturing on a larger scale. The practical relevance of this is discussed in the context of manufacturing tape-cast separators for battery applications. In addition, the volatilization of Na2O from molten sodium silicophosphate glass and sodium phosphate is investigated in different crucible materials and atmospheres to elucidate the impact of experimental parameters, different physical states, and volatilization kinetics. With knowledge of thermodynamic processes and the vapor pressure curve, mass losses can be calculated in very good agreement with the observed data.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.71236","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029103","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}

引用次数: 0

Morphotropic-Like Phase Boundary Enables Continuous τƒ Regulation in ZnNb2O6-Based Microwave Dielectric Ceramics znnb2o6基微波介电陶瓷的形致相边界实现连续τ f调节

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-23 DOI: 10.1111/jace.71259

Zhiqiang Zhang, Simin Wang, Bangxi Xie, Guangzhao Shi, Haiyi Peng, Shaohu Jiang, Xiaogang Yao, Kaixin Song, Di Zhou, Huixing Lin

{"title":"Morphotropic-Like Phase Boundary Enables Continuous τƒ Regulation in ZnNb2O6-Based Microwave Dielectric Ceramics","authors":"Zhiqiang Zhang, Simin Wang, Bangxi Xie, Guangzhao Shi, Haiyi Peng, Shaohu Jiang, Xiaogang Yao, Kaixin Song, Di Zhou, Huixing Lin","doi":"10.1111/jace.71259","DOIUrl":"https://doi.org/10.1111/jace.71259","url":null,"abstract":"<div>\u0000 \u0000 Low-loss and high-performance microwave dielectric ceramics are essential for emerging fifth-generation (5G) and sixth-generation (6G) communication systems. However, conventional composite strategies rely on fixed phase fractions to compensate the temperature coefficient of resonant frequency (TCF) (τƒ), often at the expense of quality factor (Q × ƒ) and without enabling continuous τƒ regulation. Here, a morphotropic-like phase boundary (MPB-like) is constructed in ZnNb2O6-based ceramics through synergistic control of composition and sintering temperature. Near the orthorhombic-tetragonal phase boundary, the competing phases possess comparable formation energetics, making the phase fraction highly sensitive to sintering temperature. This enables a continuous τƒ tuning from −65 to +50 ppm/°C within a narrow composition-temperature window through temperature-driven phase evolution. At the phase boundary, the optimized ceramic exhibits dielectric constant (εr) = 46, Q × ƒ = 37 000 GHz, and τƒ = −0.22 ppm/°C. Raman and terahertz spectroscopies reveal that an optimal local cation configuration contributes to the low dielectric loss. A cylindrical dielectric resonator antenna (DRA) fabricated from this ceramic delivered an experimentally measured reflection coefficient of −42.79 dB at 9.6 GHz and a simulated radiation efficiency of 88%. This work establishes a temperature-sensitive phase-boundary regulation mechanism, providing a new strategy for precise τƒ control in microwave dielectric ceramics.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029101","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

Anomalous Sintering and Structural Evolution of APD Silica Aerogels Under Extreme Thermal Conditions APD二氧化硅气凝胶在极端热条件下的异常烧结和结构演化

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-09-23 DOI: 10.1111/jace.71271

Jeanho Park, Jongbeom Lee

{"title":"Anomalous Sintering and Structural Evolution of APD Silica Aerogels Under Extreme Thermal Conditions","authors":"Jeanho Park, Jongbeom Lee","doi":"10.1111/jace.71271","DOIUrl":"https://doi.org/10.1111/jace.71271","url":null,"abstract":"This study characterizes the sintering behavior of ambient-pressure-dried (APD) silica aerogels under a high-vacuum environment (1 × 10−5 Torr) over a temperature range of 400°C–900°C. Isothermal treatments conducted for 1–30 min demonstrate that residual organic species are completely removed by 600°C, leading to a temporary increase in specific surface area (SSA) to 468 m2/g through pore reopening. Analysis of the sintering kinetics reveals an anomalous, non-monotonic temperature dependence; the rate constant (K) follows the sequence 600°C > 900°C > 800°C. In addition, x-ray diffraction analysis indicates that the kinetic retardation observed at 800°C coincides with a peak in structural disorder, as evidenced by the significant broadening (FWHM) of the amorphous halo. Between 800°C and 900°C, densification resumes via a surface diffusion–dominated mechanism, yielding an estimated apparent activation energy of ∼58 kJ/mol over this specific interval. These findings establish a definitive correlation between the degree of amorphous structural disorder and the densification kinetics in nanoporous silica frameworks.","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 10","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.71271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149029095","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}

引用次数: 0

Eu3+-Activated Ba2LaMoO6 Red-Emitting Phosphors for UVB/Blue-Driven Solid-State Lighting 用于UVB/ blue驱动固态照明的Eu3+活化Ba2LaMoO6红色发光荧光粉

IF 4.2 3区材料科学

Journal of the American Ceramic Society Pub Date : 2026-08-28 DOI: 10.1111/jace.71177

Shruti Sajwan, Pradeep K. Vishwakarma, Sunil K. Singh

{"title":"Eu3+-Activated Ba2LaMoO6 Red-Emitting Phosphors for UVB/Blue-Driven Solid-State Lighting","authors":"Shruti Sajwan, Pradeep K. Vishwakarma, Sunil K. Singh","doi":"10.1111/jace.71177","DOIUrl":"https://doi.org/10.1111/jace.71177","url":null,"abstract":"<div>\u0000 \u0000 Thermally stable red-emitting phosphors capable of sustaining efficiency at elevated temperatures are crucial for high-power solid-state lighting. In this study, Eu3+-activated Ba2LaMoO6 phosphors were synthesized via conventional solid-state reaction route at 1200°C, yielding a monoclinic phase [P21/c (14)] with successful substitution of Eu3+ at La3+ sites. Developed phosphors exhibit intense red Eu3+ emission dominated by the hypersensitive 5D0→7F2 transition, indicating a non-centrosymmetric monoclinic environment, with optimal emission at 8 mol% Eu3+ doping beyond which dipole–dipole quenching occurs. Temperature-dependent photoluminescence (TD-PL) analysis reveals gradual thermal quenching, with ∼30% emission retained at 440 K, following Arrhenius-type trend with moderate activation energies of 0.3464 and 0.3024 eV under 292 nm excitation, and 0.2873 and 0.2667 eV under 467 nm excitation during the heating and cooling cycles, respectively. To assess their practical applicability, poly(methyl methacrylate) as thermoplastic resin-dispersed phosphor integrated onto a glass slide exhibits intense red emission with high color purity, stable CIE coordinates, and low correlated color temperature (CCT). Chromaticity coordinates (CIE) remain in the red region with high color purity across the investigated temperature range, underscoring the potential of Ba2LaMoO6:Eu3+ phosphors as promising red-emitting materials for optoelectronic and solid-state lighting applications.\u0000 </div>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"109 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148849167","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