Journal of Rare Earths最新文献

{"title":"A 12R hexagonal pseudohalide rare-earth double perovskite ferroelastic: (TMPA)2EuRb(NO3)6","authors":"Peiguo Liu,&nbsp;Yulan Xie,&nbsp;Mengqiang Li,&nbsp;Mengjun Lin,&nbsp;Gele Teri,&nbsp;Haofei Ni,&nbsp;Qiangqiang Jia,&nbsp;Changfeng Wang,&nbsp;Dawei Fu,&nbsp;Yi Zhang","doi":"10.1016/j.jre.2025.09.047","DOIUrl":"10.1016/j.jre.2025.09.047","url":null,"abstract":"<div><div>Ferroelastic materials with switchable spontaneous strain show promising application prospects in mechanical switches and information storage. As an emerging multifunctional platform, pseudohalide rare-earth double perovskites (PREDPs) have demonstrated unique advantages in ferroelectrics, piezoelectrics, and X-ray detection. However, current research on PREDP ferroelastics remains limited, with reported systems confined to 3-layered cubic (3C) and Ruddlesden-Popper (RP) type structures. In this study, we synthesized a 3C PREDP (TMPA)₂EuCs(NO₃)₆ (TMPA = <em>N,N,N</em>,2-tetramethylpropan-2-aminium), which exhibits a non-ferroic phase transition below room temperature. By leveraging the tunability of B-site cations, we carried out Rb⁺ substitution for Cs⁺, which yields 12 layered rhombohedral (12R) PREDP (TMPA)₂EuRb(NO₃)₆. Structural modulation not only increases the phase transition temperature by 49 K but also induces ferroelasticity, and exhibits photoluminescence properties, with a fluorescence lifetime of 4.67 ms and a photoluminescence quantum yield (PLQY) of 54.86%. This work provides an effective way of developing new PREDP ferroelastic materials and will stimulate further exploration of PREDP multifunctional materials.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2452-2458"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148660639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dysprosium-doped Mn-Zn ferrite nanograins: A promising material for ultra-sensitive HCl gas detection at room temperature","authors":"Sushilkumar S. Bandgar,&nbsp;Gajanan M. Hingangavkar,&nbsp;Yogesh M. Jadhav,&nbsp;Ekanath K. Kore,&nbsp;Manickam Selvaraj,&nbsp;Arun Karnwal,&nbsp;Shailesh G. Pawar,&nbsp;Ramesh N. Mulik,&nbsp;Vikas B. Patil","doi":"10.1016/j.jre.2025.09.028","DOIUrl":"10.1016/j.jre.2025.09.028","url":null,"abstract":"<div><div>Present study explored the specific impact of Dy substitution in Mn-Zn ferrite (DMZFO NGs) for HCl gas sensing. The novelty lies in achieving high selectivity and fast response at relatively low temperature through controlled Dy doping, optimizing the surface properties for gas interaction. The DMZFO NGs were synthesized via a co-precipitation method, and their structural, morphological, magnetic, optical, and gas sensing properties were systematically analyzed. X-ray diffraction (XRD) confirms the single-phase spinel structure, with Rietveld refinement revealing lattice expansion due to Dy³⁺ substitution. Field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) results confirmed nanograin morphology, while X-ray photoelectron spectroscopy (XPS) ananlysis validated the presence of mixed oxidation states. The Brunauer–Emmett–Teller (BET) analysis demonstrates a mesoporous structure with a high surface area (168.27 m²/g), enhancing gas adsorption. A vibrating sample magnetometer (VSM) reveals a significant variation in magnetic parameters, contributing to sensor performance. UV–visible spectroscopy confirms a tunable bandgap, with an optimal energy level of 1.96 eV at DMZFO-2, facilitating charge carrier mobility. The fabricated chemiresistive sensor exhibits remarkable selectivity, stability, and response towards HCl at room temperature (RT). The DMZFO-2 sensor exhibits an exceptional HCl gas (100 ppm) response of 84.68% at RT with a rapid response time of 2.04 s and a recovery time of 116.37 s. Electrochemical impedance spectroscopy (EIS) reveals a reduction in charge transfer resistance upon HCl exposure, further supporting the gas sensing mechanism. The findings suggest that Dy³⁺-doped Mn-Zn ferrite nanograins hold significant potential for next-generation gas sensors in environmental and industrial applications.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2428-2440"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced near-infrared emission for plant growth and night vision through strong energy transfer in BaLu2SiAl4O12: Ce3+, Cr3+","authors":"Jianhua Liu,&nbsp;Jiarui Duan,&nbsp;Deyin Wang,&nbsp;Yuhua Wang","doi":"10.1016/j.jre.2025.08.013","DOIUrl":"10.1016/j.jre.2025.08.013","url":null,"abstract":"<div><div>Phytochrome Pr and Pfr are essential for plant growth and photosynthesis, primarily absorbing deep red light at 660 nm and near-infrared (NIR) light at 730 nm. This paper is dedicated to enhance the efficiency of deep red to NIR light emission in BaLu_{2–<em>x</em>}SiAl_{4–<em>y</em>}O₁₂ (BLSA): <em>x</em>Ce³⁺, <em>y</em>Cr³⁺ through an energy transfer strategy designed to promote plant growth and improve night vision. It is found that sample doped solely with Cr³⁺ can emit deep red to NIR emission in BLSA; however, the spin-forbidden nature of the Cr³⁺ 3d→3d transition leads to low luminescence efficiency. On the contrary, in Ce³⁺-doped BLSA, Ce³⁺ ions efficiently absorb blue light and emit intense green light, which overlaps the absorption of Cr³⁺ ions in BLSA. This spectral overlap promotes the energy transfer from Ce³⁺ to Cr³⁺, thereby enhancing the deep red to NIR emission of Cr³⁺. This enhancement is evidenced by the external quantum efficiency of Cr³⁺ emission, which is 12.5% in the sample doped solely with Cr³⁺ and is increased to 48.6% when co-doped with Ce³⁺ ions. The energy transfer mechanism between Ce³⁺ and Cr³⁺ is found to primarily involve dipole–dipole interactions, as confirmed by Dexter's formula and multipole interaction modeling. In addition, by using BLSA:0.1Ce³⁺,0.03Cr³⁺ phosphor to fabricate NIR lighting devices, it is found that the emission spectra highly match the absorption spectra of the phytochromes Pr and Pfr, demonstrating its great potential for application in indoor plant growth lighting. Moreover, the lighting source system is adaptable for various scenarios such as night vision and non-invasive bio-imaging, showcasing its promising versatility for application.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2359-2367"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable green luminescence in Eu-doped SrZrS3 perovskite with air stability","authors":"Sen Kong,&nbsp;Haoxi Dong,&nbsp;Jiale Guo,&nbsp;Zhonghai Yu,&nbsp;Kaiyun Chen,&nbsp;Kaiyan Cao,&nbsp;Liqun Wang,&nbsp;Xiaoqin Ke,&nbsp;Chao Zhou,&nbsp;Sen Yang,&nbsp;Minxia Fang,&nbsp;Yin Zhang","doi":"10.1016/j.jre.2025.09.021","DOIUrl":"10.1016/j.jre.2025.09.021","url":null,"abstract":"<div><div>Chalcogenide perovskite has attracted significant attention as a potential optoelectronic material due to its excellent light absorption, suitable direct band gap, and effective carrier transportation. While the luminescence properties of Sr-based chalcogenides have been explored recently, challenges such as low luminescence efficiency and limited performance persist. In this work, rare earth element Eu, which possesses distinctive luminescent properties, was selected to tune the luminescent properties of chalcogenide perovskites. The synthesized Eu-doped SrZrS₃ powders are demonstrated to exhibit enhanced green light emission at 550 nm under 350 nm excitation, which is attributed to the 4f⁶5d¹-4f⁷5d⁰ transition of Eu²⁺. Moreover, an investigation into the temperature-dependent luminescent measurements reveals that the PL intensity of the optimized 8 at% Eu-doped specimen at 380 K remains at 50% of that at 280 K. In addition to the well-performed thermal stability and photostability, this material exhibits excellent air stability, even when stored in air for over a year. Moreover, the direct bandgap characteristics are confirmed through experiments and calculations. And the application of this material in the luminescent anticounterfeiting field was preliminarily explored. These findings offer an approach to tune the luminescence performance of chalcogenide perovskites and promote their potential applications in the field of luminescence.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2322-2330"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy-looping strategies in Cs2NaYF6 double perovskites: Enabling ultra-low temperature self-calibrating thermometry and fluorescent anti-counterfeiting","authors":"Kejie Li,&nbsp;Jiaqi Zhao,&nbsp;Gaixin Zhang,&nbsp;Zongjie Li,&nbsp;Dongxu Guo,&nbsp;Guiying Liang,&nbsp;Yanling Wei,&nbsp;Zuoling Fu","doi":"10.1016/j.jre.2025.09.005","DOIUrl":"10.1016/j.jre.2025.09.005","url":null,"abstract":"<div><div>Remote temperature sensing based on luminescence intensity ratio (LIR) remains a significant challenge in extreme environments, particularly at ultra-low temperatures. Herein, multimodal dynamically tunable fluorescence is achieved in Cs₂NaYF₆ double perovskites through single or co-doping with Eu³⁺ and Tb³⁺. Dipole–dipole interaction is confirmed to mediate energy transfer between the Tb³⁺ and Eu³⁺, establishing enhanced energy-looping among ⁵D₄ (Tb³⁺) and ⁵D₁ (Eu³⁺) levels under 377 nm irradiation. The ⁵D₄ → ⁷F₅ transition of Tb³⁺ gives rise to four well-resolved emission, arising from the Stark splitting of the ⁵D₄ level under <em>O</em>_h symmetry. Energy-looping facilitates sustained back energy transfer from the ⁵D₁ level of Eu³⁺ to Stark sublevels, thereby amplifying the temperature-dependent variation of the LIR for four-peak emission. This results in a high relative sensitivity of 1.07%/K at 80 K and a low temperature uncertainty of 0.61 K. Meanwhile, real-time feedback is enabled by employing multimodal LIR self-calibration based on the non-thermally coupled levels of Tb³⁺ and Eu³⁺. Furthermore, by dual-wavelength switching excitation, photon barcodes and encrypted QR codes are successfully developed. Overall, this study establishes an effective LIR-based strategy for high-precision remote thermometry in ultra-low temperature environments, and opens avenues for the development of advanced fluorescent anti-counterfeiting.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2313-2321"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Medium-entropy configuration boosting upconversion luminescence in sesquioxide for optical temperature sensing","authors":"Zhenhua Li,&nbsp;Huixin Tong,&nbsp;Tianpeng Yan,&nbsp;Jingyu Shang,&nbsp;Yinglin Song,&nbsp;Yuxiao Wang,&nbsp;Xueru Zhang","doi":"10.1016/j.jre.2025.09.045","DOIUrl":"10.1016/j.jre.2025.09.045","url":null,"abstract":"<div><div>Rare earth-doped sesquioxides have emerged as promising candidates for upconversion luminescence (UCL) materials, yet their practical applications remain constrained by suboptimal emission intensity. Herein, we propose an entropy engineering strategy to enhance UCL in sesquioxides by systematically introducing La³⁺ and Y³⁺ dopants into the cubic (Gd_0.78Yb_0.2)₂O₃: 0.02Er host, to form medium-entropy configurations. The configuration entropy serves as an effective strategy for enhancing the UCL intensity. Notably, the engineered medium-entropy sesquioxide preserves cubic phase integrity while achieving remarkable UCL enhancement factors of 5.80× for Er³⁺ and 6.53× for Ho³⁺ compared to conventional binary counterparts. Through spectroscopic analysis and Eu³⁺ probe characterization, we reveal that the medium-entropy configuration reduces the lattice symmetry of the matrix. This symmetry-breaking effect may alter the crystal field environment around Er³⁺/Ho³⁺ activators, promoting radiative transitions and thereby improving UCL intensity. Moreover, the medium-entropy sesquioxide exhibits pronounced temperature-dependent UCL behavior. Utilizing the non-thermally coupled levels of Er³⁺ ions, we achieve outstanding temperature sensing performance with a maximum absolute sensitivity of 91.97%/K and relative sensitivity of 0.78%/K at 313 K through the luminescence intensity ratio technique. This work presents an innovative entropy engineering strategy for enhancing UCL and opens new possibilities for designing high-performance optical thermometric materials.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2296-2303"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneously enhancing energy storage density and efficiency in Bi0.42Na0.5Sm0.08TiO3 ceramics via introduction of rare-earth perovskite materials","authors":"Xiaoliang Zhang,&nbsp;Shiyu Yang,&nbsp;Yanchun Huang,&nbsp;Haixiang Tan,&nbsp;Xu Li,&nbsp;Xiuli Chen,&nbsp;Yuanli Liu,&nbsp;Huanfu Zhou","doi":"10.1016/j.jre.2025.10.010","DOIUrl":"10.1016/j.jre.2025.10.010","url":null,"abstract":"<div><div>Designing the optimal component material is both valuable and challenging, primarily due to the difficulty in simultaneously achieving high recoverable energy storage density (<em>W</em>_rec) and outstanding efficiency (<em>η</em>). To address this challenge, the synergistic effects of optimizing the component, refining the grain size, widening the bandgap, and adjusting the domain structure are proposed to improve comprehensive performance by incorporating Nd(Mg_0.5Zr_0.5)O₃ into the Bi_0.42Na_0.5Sm_0.08TiO₃ matrix. Consequently, under a breakdown field strength (<em>E</em>_b) of 395 kV/cm, a <em>W</em>_rec of 8.3 J/cm³ and an <em>η</em> of 83.5% are achieved in the 0.95Bi_0.42Na_0.5Sm_0.08TiO₃–0.05Nd(Mg_0.5Zr_0.5)O₃ (0.95BNST–0.05NMZ) ceramics. Meanwhile, the 0.92Bi_0.42Na_0.5Sm_0.08TiO₃–0.08Nd(Mg_0.5Zr_0.5)O₃ (0.92BNST–0.08NMZ) ceramics exhibit a <em>W</em>_rec of 8.1 J/cm³ and an <em>η</em> of 90.0% under an <em>E</em>_b of 420 kV/cm. And the 0.95BNST–0.05NMZ ceramics maintain an ultrahigh polarization difference (Δ<em>P</em>) of 50.8 μC/cm². Furthermore, the introduction of NMZ ensures that the dielectric permittivity remains substantially constant over a temperature range from −60 to 180 °C, thereby significantly expanding the operational range of capacitors. Concurrently, it demonstrates excellent thermal stability (20–180 °C) and frequency stability (1–260 Hz) under an electric field (<em>E</em>) of 200 kV/cm. And 0.95BNST–0.05NMZ ceramics also exhibit an ultrahigh discharge energy density (<em>W</em>_D of 6.23 J/cm³). These advantages provide a novel strategy for designing capacitors.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2408-2417"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Protection and mechanism of cerium chemical conversion film against copper corrosion in solution containing sulfate-reducing bacteria","authors":"Tianguan Wang,&nbsp;Huixuan Qian,&nbsp;Peng Xu,&nbsp;Shuo Tang,&nbsp;Bo Zhang,&nbsp;Guozhe Meng","doi":"10.1016/j.jre.2025.09.025","DOIUrl":"10.1016/j.jre.2025.09.025","url":null,"abstract":"<div><div>Copper (Cu) is extensively employed in biofouling control owing to its inherent biocidal properties, however, its limited inhibitory effect against sulfate-reducing bacteria (SRB) can induce rapid localized corrosion and perforation. To mitigate this limitation, cerium chemical conversion films were <em>in situ</em> synthesized on Cu substrates via a chemical conversion approach. This study systematically examined their impact on microbially influenced corrosion (MIC) resistance and elucidated the synergistic dual protection mechanisms. The overlap of the 4f/5d orbitals of cerium promotes a reversible transformation of Ce³⁺/Ce⁴⁺, which is accompanied by oxygen uptake and release. Under anaerobic SRB-containing conditions, the released atomic oxygen not only sustains passivation at the substrate–film interface but also suppresses SRB adhesion and biofilm formation. Concurrently, the dissolved Ce⁴⁺ ions act as potent oxidants, depriving SRB of vital electrons required for energy metabolism, thereby disrupting their proliferation and mitigating MIC of copper. The work may offer a strategic framework for microbial corrosion prevention of copper alloy for heat exchangers.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2486-2500"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulating interfacial electron transfer over CoCeTiOx nanotube to boost sulfur tolerance for synergistic removal of NO and Hg0","authors":"Biao Li,&nbsp;Yaqin Hou,&nbsp;Shaocheng Zhang,&nbsp;Bing Wang,&nbsp;Wenqing Xu,&nbsp;Zhanggen Huang,&nbsp;Jiancheng Wang,&nbsp;Liping Chang,&nbsp;Weiren Bao,&nbsp;Kechang Xie","doi":"10.1016/j.jre.2025.09.002","DOIUrl":"10.1016/j.jre.2025.09.002","url":null,"abstract":"<div><div>Synergistic removal of NO and Hg⁰ has exhibited potential applications in the industrial flue gas purification. However, SO₂ poisoning poses an obvious threat to the long-term industrial application of catalyst. Herein, a desirable catalyst with marvelous SO₂ tolerance was developed through precisely modulating interfacial electron transfer, enabled by the synchronous amelioration of redox and acidity. Impressively, the NO conversion and Hg⁰ removal efficiency stabilize near 92% and 96% at 240 °C in the presence of SO₂, respectively. The characterization analysis in conjunction with density function theory (DFT) calculation substantiates that the attenuation of interfacial electron transfer between SO₂ and catalyst distinctly inhibits the adsorption and oxidation of SO₂, retarding the deposition of sulfate species. Additionally, the traditional SO₂ poisoning sediment is transformed into functionalized cerium sulfate on the CoCeTiO_<em>x</em> nanotube catalyst, which exposes extra Brønsted acid sites to participate in the NO removal reaction, thus a two-stage strategy was designed skillfully to boost sulfur tolerance for synergistic removal of NO and Hg⁰. This work proposes a credible paradigm for the development and pursuit of efficient sulfur resistant catalyst in synergistic removal of NO and Hg⁰.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2385-2395"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148660551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic enhancement of mechanical properties and ignition resistance of as-extruded Mg-Zn-Zr-Ca alloys via yttrium addition","authors":"Shicheng Li,&nbsp;Ke Wang,&nbsp;Bangmin Luo,&nbsp;Jiangpeng Qiao,&nbsp;Shuang Yan,&nbsp;Hongyun Li,&nbsp;Jingfeng Wang,&nbsp;Fusheng Pan","doi":"10.1016/j.jre.2025.09.033","DOIUrl":"10.1016/j.jre.2025.09.033","url":null,"abstract":"<div><div>Based on the Mg-6Zn-0.6Zr (wt%) alloy, this study designed two new ignition-resistant magnesium alloys, Mg-6Zn-0.6Zr-1.6Ca (ZKX602) with single Ca addition, and Mg-6Zn-0.6Zr-0.6Ca-1.0Y (ZKXW6001) with partial Ca replacement by rare earth yttrium (Y). A comparative study examined differences in microstructure, mechanical properties, and ignition resistance between both alloys. The results show that both as-cast alloys exhibit dendritic structures with a continuous mesh-like second phase. The ZKX602 alloy contains Ca₂Mg₆Zn₃ phase, while ZKXW6001 alloy has both Ca₂Mg₆Zn₃ and W-phase, with finer phase sizes. After homogenization, a few Ca₂Mg₆Zn₃ phases dissolve in both alloys, while the W-phases in ZKXW6001 alloy are completely retained. After extrusion, both alloys exhibit a bimodal grain structure, with retained phase fragmented into granular and banded morphologies, and MgZn nanoparticles dynamically precipitate in the matrix. The ZKXW6001 alloy shows superior mechanical properties, with ultimate tensile strength of 408.3 MPa, yield strength of 383.8 MPa, and elongation of 11.3%, due to its fine grain size, uniformly distributed phases, strong texture, and high-density residual dislocations. Additionally, the ignition point of the ZKXW6001 alloy reaches 1056 °C due to a denser, thicker Y₂O₃-CaO-MgO-ZrO₂ composite oxide layer. These results highlight the effectiveness of co-addition strategies in synergistically enhancing the mechanical properties and ignition resistance of magnesium alloys.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 8","pages":"Pages 2470-2485"},"PeriodicalIF":9.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148660553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}