Ceramics International最新文献_第3页

Enhancing upconversion luminescence of Er3+ ions In NaYF4:Yb3+/Er3+/Au@Ag composite nanostructures 在NaYF4:Yb3+/Er3+/Au@Ag复合纳米结构中增强Er3+离子的上转换发光

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.544

Wei Gao, Jinglei Zhang, Lin Shao, Jiaxi Li, Peng Ding, Qingyan Han, Xuewen Yan, Chenyun Zhang, Jun Dong

{"title":"Enhancing upconversion luminescence of Er3+ ions In NaYF4:Yb3+/Er3+/Au@Ag composite nanostructures","authors":"Wei Gao, Jinglei Zhang, Lin Shao, Jiaxi Li, Peng Ding, Qingyan Han, Xuewen Yan, Chenyun Zhang, Jun Dong","doi":"10.1016/j.ceramint.2024.12.544","DOIUrl":"10.1016/j.ceramint.2024.12.544","url":null,"abstract":"<div><div>Enhancing upconversion luminescence in rare-earth materials through the plasmonic effects of precious metals has emerged as a highly effective strategy. In this study, we explore three distinct self-assembly techniques to fabricate alloy nano-film substrates using silver-coated gold (Au@Ag) core-shell nanoparticles, each with unique structural attributes. To enhance the upconversion luminescence of Er3+ ions, we combine these substrates with NaYF4:Yb3+/Er3+ nanoparticles, creating NaYF4:Yb3+/Er3+/Au@Ag composite nanostructures. The upconversion emission of Er3+ ions is observably boosted when directly combined with Au@Ag nano-films of various structures under a 980 nm laser excitation. Surprisingly, incorporating a NaYF4 inert shell as an isolating layer results in a remarkable 13.7-fold enhancement of upconversion luminescence in the NaYF4:Yb3+/Er3+@NaYF4/Au@Ag composite structure relative to isolated NaYF4: Yb3+/Er3+ nanoparticles. The enhancement mechanism was carefully discussed based on spectral characteristics and luminous lifetime. It was found that the enhanced upconversion emission of nanoparticles on differently structured substrates is primarily driven by excitation enhancement. The composite rare-earth and metal nanoparticle structures fabricated in this investigation not only effectively enhance material spectral properties effectively but also streamline the process by employing an inert NaYF4 shell as an isolation layer. This novel approach offers a promising avenue for developing efficient luminescent material systems.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11277-11285"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A cationic substitution strategy was employed to synthesize phosphor K2NaIn1-xAlxF6: Cr3+, Mn4+ with enhanced optical properties and thermal stability 采用阳离子取代策略合成了光学性能和热稳定性增强的磷光体K2NaIn1-xAlxF6: Cr3+， Mn4+

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.048

Wenxia Li , Ruihan Liang , Jipeng Rao , Xiaoyun Mi , Xiuling Liu

{"title":"A cationic substitution strategy was employed to synthesize phosphor K2NaIn1-xAlxF6: Cr3+, Mn4+ with enhanced optical properties and thermal stability","authors":"Wenxia Li , Ruihan Liang , Jipeng Rao , Xiaoyun Mi , Xiuling Liu","doi":"10.1016/j.ceramint.2025.01.048","DOIUrl":"10.1016/j.ceramint.2025.01.048","url":null,"abstract":"<div><div>Based on crystal field theory and inspired by advancements in photovoltaic catalysis, a series of luminescent materials, K2NaIn0.88-xF6: 0.1Cr3+, 0.02Mn4+, xAl3+ (x = 0.015–0.035), were synthesized via the hydrothermal method. Compared to the K2NaIn0.88F6: 0.1Cr3+, 0.02Mn4+ phosphor, the introduction of Al3+ led to a substantial enhancement in luminescence properties: the luminescence intensity increased by 1.73 times, and the quantum yield (QY) rose from 36.8 % to 59.2 %. To uncover the mechanism behind this improvement, first-principles calculations were performed to analyze changes in the band gap and density of states of the K2NaInF6 host upon Al3+ doping. These studies provided detailed insights into the root cause of the luminescence enhancement following the partial substitution of In3+ by Al3+. Additionally, the doped samples demonstrated improved resistance to thermal quenching. At 423 K (150 °C), the luminescence intensity retained 80.46 % of its value at room temperature, representing an approximate 5 % increase in thermal stability. This was further supported by calculations of the Debye temperature and activation energy. In conclusion, a device featuring NIR pc-LED was created utilizing the NIR phosphor that was synthesized. When operating at a current of 350 mA, the NIR output power attained 190.58 mW; while at a lower current of 50 mA, the device achieved an electrical conversion efficiency of 15.4 %. Additionally, the material was effectively utilized for biological imaging and night-vision purposes, producing promising results.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11961-11973"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The microstructure and properties of reinforced Ni-20WC coatings by the laser-cladding in-situ synthesis of xNbC 激光熔覆原位合成xNbC增强Ni-20WC涂层的组织和性能

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.160

Guofu Lian , Jiangbin Chen , Hua Lu , Changrong Chen , Xu Huang

{"title":"The microstructure and properties of reinforced Ni-20WC coatings by the laser-cladding in-situ synthesis of xNbC","authors":"Guofu Lian , Jiangbin Chen , Hua Lu , Changrong Chen , Xu Huang","doi":"10.1016/j.ceramint.2025.01.160","DOIUrl":"10.1016/j.ceramint.2025.01.160","url":null,"abstract":"<div><div>Laser cladding was used to fabricate in-situ synthesized xNbC, enhancing the Ni-20 W C coating on AISI1045 steel. The study examined the effects of NbC synthesis on the microstructure, microhardness, tribological properties, and corrosion resistance of metal-matrix composite (MMC) coatings. No significant changes were observed in phase composition with increasing NbC synthesis. As x increased, structural changes included NbC particle agglomeration, roughening, FCC phase density variations, and WCp nucleation. At x = 20 wt%, the structure was optimally refined with even distribution. The nucleation of WCp gradually changed from granular grain boundary segregation to heterogeneous nucleation close to NbC. Thermodynamic calculations revealed a gradient-layered structure at the WCp-NbC interface. The microhardness peaked at 57.63 HRC with 20 wt% NbC, approximately 3.6 times the matrix hardness. The coatings exhibited abrasive, adhesive, and oxidative wear. The coating exhibits the best corrosion resistance at x = 20 wt%. The results provide a theoretical basis for high-performance MMC coatings via laser cladding.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 13135-13151"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Production and characterization of glass/cordierite/hBN composites for low temperature co-fired ceramic applications 低温共烧陶瓷用玻璃/堇青石/hBN复合材料的制备与表征

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.210

Oğuzhan Bilaç, Gülsüm Topateş, Cihangir Duran

引用次数: 0

Lightweight mullite fiber-reinforced SiCnw/SiOC composites for efficient insulation and electromagnetic wave absorption 轻质莫来石纤维增强SiCnw/SiOC复合材料，高效绝缘和电磁波吸收

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.082

Xinlei Jia, Xinqiao Wang, Donghui Guo, Shun Wang, Runze Jin, Ning Zhou, Baosheng Xu

{"title":"Lightweight mullite fiber-reinforced SiCnw/SiOC composites for efficient insulation and electromagnetic wave absorption","authors":"Xinlei Jia, Xinqiao Wang, Donghui Guo, Shun Wang, Runze Jin, Ning Zhou, Baosheng Xu","doi":"10.1016/j.ceramint.2025.01.082","DOIUrl":"10.1016/j.ceramint.2025.01.082","url":null,"abstract":"<div><div>Owing to their excellent thermal insulation properties and chemical stabilities, ceramic aerogels are widely employed in thermal protection structure; however, their potential as electromagnetic wave (EMW) absorbers remains underdeveloped. Aerogels that provide both high-temperature thermal insulation and EMW absorption are difficult to obtain. Herein, a new mullite/SiC/SiOC (MCS) composite aerogel was grown in situ using a sol–gel process with a mullite nanofiber sponge as reinforcement. The pores in the fiber sponge are filled with numerous SiC nanowires and SiOC aerogel, forming a multiscale porous nanostructure. The semiconductor insulator composition and specific nanostructure endow MCS with excellent impedance-matching characteristics and strong EMW loss capability. The minimum reflection loss reaches −35.12 dB at a thickness of 2.5 mm and the effective absorption bandwidth almost covers the X-band. Meanwhile, the composite is lightweight (0.13–0.15 g cm−3) with a low thermal conductivity (0.03–0.036 W m−1 K−1), offering excellent thermal insulation performance. Overall, MCS composites are promising for applications requiring thermal insulation and EMW absorption.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12387-12395"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Stepwise optimization in MgO-modified Sr0.985Ho0.01TiO3-based ceramics for high-insulation capacitors mgo改性sr0.985 ho0.01 tio3基陶瓷高绝缘电容器的逐步优化

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.143

Yongqiang Yang , Yongping Pu , Lei Zhang , Bo Wang , Zhemin Chen , Min Chen , Xiang Lu , Chunhui Wu , Jinbo Zhang , Noureddine Blidi

{"title":"Stepwise optimization in MgO-modified Sr0.985Ho0.01TiO3-based ceramics for high-insulation capacitors","authors":"Yongqiang Yang , Yongping Pu , Lei Zhang , Bo Wang , Zhemin Chen , Min Chen , Xiang Lu , Chunhui Wu , Jinbo Zhang , Noureddine Blidi","doi":"10.1016/j.ceramint.2025.01.143","DOIUrl":"10.1016/j.ceramint.2025.01.143","url":null,"abstract":"<div><div>Achieving high insulation resistivity and superior temperature stability of high permittivity simultaneously poses a significant challenge in the field of power electronics. This study employed a stepwise enhancement approach in Sr0.985Ho0.01TiO3-xwt%MgO (x = 0, 0.05, 0.15, 0.25, 0.35, 0.45) (SHT-xM) ceramics via the coordination of charge compensation (balancing Ho and Mg ions) and grain-boundary obstruction (clustering of MgO). The modified ceramics demonstrated a high permittivity (1800), excellent temperature stability (X8P, ΔC/C25 °C ≤ 10 %, −50–150 °C; ΔC/C25 °C ≤ 0.6 %, −40–70 °C) and exceptional insulation resistivity (1012 Ω • cm), meeting the demands of high insulation X8P capacitors. Furthermore, these outstanding properties can be attributed to charge compensation in the formation of [<math><mrow><msubsup><mrow><mi>M</mi><mi>g</mi></mrow><mrow><mi>T</mi><mi>i</mi></mrow><mo>″</mo></msubsup><mo>−</mo><msubsup><mrow><mn>2</mn><mi>H</mi><mi>o</mi></mrow><mrow><mi>S</mi><mi>r</mi></mrow><mo>•</mo></msubsup></mrow></math>] and <math><mrow><mo>[</mo><mrow><msubsup><mrow><mi>M</mi><mi>g</mi></mrow><mrow><mi>T</mi><mi>i</mi></mrow><mo>″</mo></msubsup><mo>−</mo><msubsup><mi>V</mi><mi>O</mi><mrow><mo>•</mo><mo>•</mo></mrow></msubsup></mrow><mo>]</mo></mrow></math>, reduction of grain size and grain-boundary pinning of MgO based on defect and structural analysis. Our study presents a novel and efficient strategy to overcoming the challenge of achieving both superior temperature stability of permittivity and high insulation resistivity.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12984-12991"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Optimizing electrostatic chuck performance through ZrO₂/Al₂O₃ ratio and doping components (SiO₂ and Y₂O₃) 通过ZrO₂/Al₂O₃比例和掺杂成分（SiO₂和Y₂O₃）优化静电吸盘性能

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.562

Jongwoo Lim , Dahoon Kim , Nam Hui Lee , Young Gon Kim , Hak Ki Yu , Jae-Young Choi , Jae-Hyuk Park

{"title":"Optimizing electrostatic chuck performance through ZrO₂/Al₂O₃ ratio and doping components (SiO₂ and Y₂O₃)","authors":"Jongwoo Lim , Dahoon Kim , Nam Hui Lee , Young Gon Kim , Hak Ki Yu , Jae-Young Choi , Jae-Hyuk Park","doi":"10.1016/j.ceramint.2024.12.562","DOIUrl":"10.1016/j.ceramint.2024.12.562","url":null,"abstract":"<div><div>This study explores the enhancement of electrostatic chuck (ESC) performance through the modulation of the ZrO₂/Al₂O₃ ratio, with additional doping of Y₂O₃ and SiO₂, deposited via Atmospheric Plasma Spraying (APS). Three different ZrO₂/Al₂O₃ mixed powders, further doped with Y₂O₃ and SiO₂, were prepared and analyzed for their electrical and mechanical properties. By utilizing APS to deposit these coatings, we achieved uniform and crack-free layers with controlled thickness and consistent mechanical properties. Notably, the mixed powder with the highest ZrO₂ content achieved a relative dielectric constant of about 22 with a volume resistivity of ∼1.0 × 101⁴ Ωcm. The enhanced dielectric constant and reduced resistivity induced the Johnsen-Rahbek (J-R) effect, leading to an improved clamping force 25 gf/cm2 on glass substrate, exceeding the industrial requirement of 10∼15 gf/cm2. Additionally, this ZrO₂/Al₂O₃ composition demonstrated a breakdown voltage of approximately 4200 V and a dielectric strength of about 17 V/μm, showcasing better voltage stability compared to traditional TiO₂-doped Al₂O₃. The high breakdown strength and excellent adhesion force suggest that ZrO₂-Al₂O₃ coatings, along with Y₂O₃ and SiO₂ doping, offer superior performance and reliability, making them viable alternatives to traditional TiO₂-doped Al₂O₃ chucks in advanced semiconductor manufacturing applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11432-11436"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Impact of Mn doping on structural, optical and dielectric properties of titanium-based double perovskite La2CuTi1-xMnxO6 Mn掺杂对钛基双钙钛矿La2CuTi1-xMnxO6结构、光学和介电性能的影响

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.563

M.S.M. Rafie , A.M. Mahat , M.Z.M. Halizan , M. Musyarofah , Z. Mohamed

{"title":"Impact of Mn doping on structural, optical and dielectric properties of titanium-based double perovskite La2CuTi1-xMnxO6","authors":"M.S.M. Rafie , A.M. Mahat , M.Z.M. Halizan , M. Musyarofah , Z. Mohamed","doi":"10.1016/j.ceramint.2024.12.563","DOIUrl":"10.1016/j.ceramint.2024.12.563","url":null,"abstract":"<div><div>A new series of La2CuTi1-xMnxO6 (x = 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) material was synthesized using the conventional solid-state method, and their structural, optical, and dielectric properties were studied using various techniques, including X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, Field-emission scanning electron microscopy (FESEM), High-Resolution Transmission Electron Microscopy (HRTEM), Electrical impedance spectroscopy (EIS), and UV–Vis spectroscopy. XRD and Rietveld refinement confirmed that Mn was successfully incorporated at the Ti site in an orthorhombic structure with Pnma space group. FESEM images indicated that grain sizes increased with increased doping while HRTEM images revealed high crystallinity. X-ray Photoelectron Spectroscopy (XPS) analysis findings confirmed the stability of La3+, Cu2+, and Ti4+ across both compositions of La2CuTi1-xMnxO6 (x = 0.00 and 0.20), while Mn4+ was effectively integrated into the doped sample. Additionally, the analysis revealed the presence of oxygen vacancies, which could enhance critical properties like charge transport and conductivity. The UV–Vis analysis showed that the band gap energy dropped from 2.06 eV to 1.62 eV as the doping level went from x = 0.00 to x = 0.25. Dielectric analysis indicated that both dielectric constants and tangent losses were higher at lower frequencies and decreased as the frequency increased. Significantly, La2CuTi1-xMnxO6 (x = 0.05) exhibited a higher dielectric constant than the parent compound, La2CuTiO6, highlighting the ability of doping to alter the dielectric properties of double perovskite materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11437-11454"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Preparation and long-term ablation resistance of reaction-sintered Cf/SiBCN (Zr) composites 反应烧结Cf/SiBCN （Zr）复合材料的制备及其长期抗烧蚀性能

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.097

Hao Sui , Jianshan Zhou , Jinye Niu , Ziheng Cui , Jingjing Gao , Yansong Zhao , Feibiao Liu , Yun Wu , Zhe Peng

{"title":"Preparation and long-term ablation resistance of reaction-sintered Cf/SiBCN (Zr) composites","authors":"Hao Sui , Jianshan Zhou , Jinye Niu , Ziheng Cui , Jingjing Gao , Yansong Zhao , Feibiao Liu , Yun Wu , Zhe Peng","doi":"10.1016/j.ceramint.2025.01.097","DOIUrl":"10.1016/j.ceramint.2025.01.097","url":null,"abstract":"<div><div>The Cf/SiBCN-ZrB2 composites were prepared using an inorganic synthesis method - hot press reactive sintering. Three distinct composites were fabricated by combining reactive sintering with high-temperature melt infiltration, with the raw material ratios adjusted accordingly. A long-term ablation test lasting 400 s was performed using an oxy-acetylene flame, the surface temperatures of the samples exceeded 2100 °C. The absence of macroscopic cracks in all three samples indicates that the SiBCN composites, prepared via reactive sintering, exhibit excellent high-temperature stability. Among these, the composites with a higher silicon content, demonstrated the lowest ablation loss rate, with linear and mass ablation rates of 0.205 μm/s and 1.11 mg/s, respectively, significantly outperforming the composites with a reduced silicon content. The surface of the ablated samples, the continuous and dense ZrO2-SiO2 oxide layer, which serves as the main ablation barrier, effectively isolates the matrix from the oxy-acetylene flame.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12563-12576"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental and molecular dynamics analyses of the replacement of K₂O by SrO on the structural, thermal, and spectroscopic properties of K₂O-SrO-B₂O₃ glasses 用SrO取代K₂O的实验和分子动力学分析对K₂O-SrO- b₂O₃玻璃的结构、热学和光谱性质的影响

IF 5.1 2区材料科学

Ceramics International Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.524

N.F. Dantas, F.W.S. Rodrigues, M.N. Queiroz, F. Pedrochi, A. Steimacher

{"title":"Experimental and molecular dynamics analyses of the replacement of K₂O by SrO on the structural, thermal, and spectroscopic properties of K₂O-SrO-B₂O₃ glasses","authors":"N.F. Dantas, F.W.S. Rodrigues, M.N. Queiroz, F. Pedrochi, A. Steimacher","doi":"10.1016/j.ceramint.2024.12.524","DOIUrl":"10.1016/j.ceramint.2024.12.524","url":null,"abstract":"<div><div>In this work, a series of borate glasses with the composition (40-x)K2O-xSrO-60B2O3 (BKSr), with x = 10, 20 and 30 mol% were synthesized by melt-quenching technique, and their structural, thermal and spectroscopic properties, along with a molecular dynamics study, were discussed as a function of the replacement of K2O with SrO. The amorphous nature of all samples was confirmed by X-Ray Diffraction (XRD) and the physical properties such as density and molar volume indicated that the replacement promotes a greater packing and polymerization of the glass network. Fourier-Transform Infrared (FTIR) analysis revealed the structural changes in glass network as a function of SrO content, indicating BO3 conversion into BO4 units, which were confirmed by tetracoordinated boron fraction (N4). Based on the absorption coefficients, the glasses were found to exhibit broad transparency across the UV to NIR regions (350–2500 nm). Molecular dynamics simulations were employed to obtain information about the glass microstructure and to compare it with experimental data. The results indicate that all glasses presented good properties to be applied in optical devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11048-11058"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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