Ceramics International最新文献

{"title":"Effect of potassium hydroxide content in the molten salt on the chemical strengthening of aluminosilicate flexible glasses","authors":"Fei Xu ,&nbsp;Hang Xiao ,&nbsp;Kai Li ,&nbsp;Peijing Tian ,&nbsp;Jian Yuan ,&nbsp;Zhenqiang Guo","doi":"10.1016/j.ceramint.2025.06.201","DOIUrl":"10.1016/j.ceramint.2025.06.201","url":null,"abstract":"<div><div><span><span>Flexible glass has a wide range of applications in the fields of flexible display, OLED lighting and photovoltaic conversion. Chemical strengthening is one of the most effective methods of enhancing the performance of flexible glass. Through appropriate adjustment of the composition of molten salt in chemical strengthening, the scratch resistance and </span>bending strength<span><span> of chemically strengthened flexible glass could be enhanced ulteriorly. In this paper, the effects of KOH content in molten salt on glass mechanical properties, alkali metal<span><span> ions distribution and structure of high aluminum<span> flexible glass are investigated by mechanical performance testing equipment, electron probe microanalyzer and </span></span>Raman spectroscopy, and the </span></span>diffusion coefficients were calculated by the Boltzmann-Mattano method. The results demonstrate that the increased interstitial space in the glass caused by the KOH added in the molten salt modifies the surface state of the glass and depolymerises the glass network structure, resulting in an increase in the diffusion coefficient of K</span></span>⁺<span>. The combined effect of these results is the enhancement of the mechanical properties of the chemically strengthened flexible glass. In comparison with glass samples devoid of KOH in the molten salt, the surface compressive stress of the glass increased from 870.71 MPa to 918.52 MPa, and the depth of the stress layer increased from 14.06 μm. to 15.58 μm, the breakage bending radius decreased from 7.79 mm to 7.13 mm at a content of 0.3 wt% of KOH in the molten salt. And the Vickers hardness did not reduced when KOH content in the molten salt is below 0.3 wt%.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39656-39664"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922160","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}

{"title":"Co-melting mechanism of foam ceramics prepared using blast furnace slag and multiple solid wastes","authors":"Jia-Hui Zhu ,&nbsp;Yi-Ci Wang ,&nbsp;Wei Zhao ,&nbsp;Hong-Wei Guo ,&nbsp;Yi-Fan Chai ,&nbsp;Pei-Jun Liu ,&nbsp;Guo-Ping Luo","doi":"10.1016/j.ceramint.2025.06.186","DOIUrl":"10.1016/j.ceramint.2025.06.186","url":null,"abstract":"<div><div><span><span><span>Current research on the preparation of foam ceramics predominantly centers on individual solid waste materials or simple mixed systems. There is a notable absence of </span>systematic analysis<span><span> regarding the synergetic reaction mechanisms of multiple complex solid wastes, as well as comprehensive studies on the material migration pathways in multi-component solid waste systems. To systematically investigate the sintering reaction mechanism for preparing foam ceramics using </span>blast furnace slag in conjunction with multiple solid wastes, to this end, raw materials were divided into high- and low-melting-point solid waste mixtures, and a </span></span>eutectic<span><span><span> temperature range of 1160–1220 °C was determined through thermodynamic calculations and melting point experiments. Layered </span>eutectic<span> experiments were performed, and X-ray diffraction analysis, scanning electron microscopy, and other analysis methods were used to study the phase transition law and structural evolution characteristics of heterogeneous interfaces under temperature gradients. The results indicate that, at 1180 °C, eutectic zones of high- and low-melting-point solid waste mixtures form a stable structure with </span></span>diopside<span><span> as the main crystalline phase and uniformly distributed </span>pore structures. The diffusion of Na</span></span></span>⁺<span> in the low-melting point solid waste mixture can significantly reduce the liquid phase formation temperature of the CaO-SiO</span>₂-Al₂O₃<span><span><span>-MgO system, and the resulting silicate melt can continuously corrode the </span>solid particles of the high-melting point solid waste mixture, promoting the synthesis of diopside and </span>pyroxene<span> phases in the eutectic zone. This “solid–liquid erosion” effect not only optimizes the matching relationship between melt viscosity<span> and surface tension but also achieves precise control of the pore structure by regulating the ion migration rate. This study clarifies the synergistic preparation mechanism of foam ceramics from multicomponent solid waste in terms of multiphase interface reaction kinetics through layered eutectic experiments and material migration path research. This study presents a theoretical basis for developing new solid-waste-based lightweight high-strength ceramic materials.</span></span></span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39511-39521"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922244","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}

{"title":"Insights into the reduction pathway of TiB2 powder synthesized with TiO2-B4C-C system by boro/carbothermal reduction","authors":"Xin Li,&nbsp;Chen Xu,&nbsp;Shilun Chang,&nbsp;Jian Tang,&nbsp;Bin Chen,&nbsp;Jia Qiao,&nbsp;Hongming Wang","doi":"10.1016/j.ceramint.2025.06.188","DOIUrl":"10.1016/j.ceramint.2025.06.188","url":null,"abstract":"<div><div>Understanding the reaction mechanism is crucial for precisely controlling the synthesis of high-quality TiB₂ powders with tailored particle characteristics. The microwave-assisted boro/carbothermal reduction reaction pathway of TiO₂-B₄C-C system was systematically investigated by stepwise heating method and thermogravimetric-differential scanning calorimetry (TG-DSC) analysis and the reaction process showed an obvious two-stage feature: in Stage Ⅰ (750–1100 °C), TiBO₃ acted as the main intermediate phase, coexisting with the substable Ti₂O₃ and TiC, prompting the TiB₂<span> nuclei began to nucleate initially at the interface of the feedstock B</span>₄C and TiBO₃<span>. Stage II (1100–1450 °C) featured progressive solid-state diffusion process that eliminated residual B</span>₂O₃ and TiC, resulting in the formation of phase-pure TiB₂<span> with optimized grain morphology. By systematically tracing the phase transition process and combining it with microstructural characterization, it was confirmed that the generation and transformation of intermediate phases, especially the formation and decomposition of the TiBO</span>₃ phase, played an important role in regulating the particle size and morphology distribution of the final products. Eventually, finer TiB₂ powders (D50 = 330 nm) with carbon and oxygen contents of 0.36 wt% and 0.53 wt%, respectively, were prepared using a smaller (D50 = 0.44 μm) B₄C precursor.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39531-39539"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922246","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}

{"title":"Enhanced pyroelectric performance via co-doping strategy on lead-free potassium sodium niobate ceramics and the multilayer structure for energy harvesting application","authors":"Cong Su ,&nbsp;Hua Hao ,&nbsp;Zhonghua Yao ,&nbsp;Minghe Cao ,&nbsp;Hanxing Liu","doi":"10.1016/j.ceramint.2025.06.258","DOIUrl":"10.1016/j.ceramint.2025.06.258","url":null,"abstract":"<div><div><span><span>In the context of pyroelectric infrared detectors, pyroelectrics play a crucial role. Among lead-free pyroelectrics, KNN ceramics had the potential due to its high curie temperature. Herein, co-doping of </span>Fe ions and Al</span>³⁺were utilized for 0.995(K_0.48Na_0.52)_0.95Li_0.05NbO₃-0.005BiAl_1<em>-x</em>Fe_<em>x</em>O₃ (KNLN-BAFO) ceramics to enhance the pyroelectric performance. The elevated pyroelectric performance was achieved for the ceramic (<em>x</em> = 0.4) with <strong><em>p</em></strong> (∼4.13 × 10⁻⁴ C m⁻² K⁻¹), better FoMs including <em>F</em>_i (2.01 × 10⁻¹⁰ mV⁻¹), <em>F</em>_v (0.024 m² C⁻¹) and <em>F</em>_d (∼1.419 × 10⁻⁵ Pa^−1/2<span>), which indicated a promising candidate of pyroelectrics. Meanwhile the defect of trapped charges in ceramics were discussed via TSDC and impedance spectroscopy. Moreover, the enhancement of pyroelectric response should be attributed to synergetic effect from the coexistence of orthorhombic phase and tetragonal phase with increased polarizability of defect dipoles. The multilayered structure (MLC) was tried for pyroelectric energy harvesting devices. This work elucidated an important role of transition metal, implied the obvious advantage of MLC for miniaturization and provided guidance to design ceramics and structures for pyroelectric applications in the future.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40261-40271"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922720","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}

{"title":"Achievement of multi-excitation anti-counterfeiting applications using lanthanide Cs2NaTmCl6 double perovskite single crystals","authors":"Linghui Meng ,&nbsp;Wuyang Fan ,&nbsp;Fangfei Yan ,&nbsp;Lu Liu ,&nbsp;Haoming Wei ,&nbsp;Yangqing Wu ,&nbsp;Bingqiang Cao","doi":"10.1016/j.ceramint.2025.06.262","DOIUrl":"10.1016/j.ceramint.2025.06.262","url":null,"abstract":"<div><div><span><span>Lanthanide-doped inorganic perovskites have always been regarded as excellent </span>luminescent materials<span><span> for anti-counterfeiting and information encryption, owing to their simple design, color tunability and unique </span>optical properties. In this study, Cs</span></span>₂NaTmCl₆<span> double perovskite single crystals (DPSCs), achieving tunable multimode luminescence under varying temperatures and excitation wavelengths were obtained. The possible emission and energy transfer mechanisms between Tm</span>³⁺<span> ions under different temperature are discussed in detail. Furthermore, the unique optical properties of Cs</span>₂NaTmCl₆ DPSCs enable us to demonstrate its applications in multi-mode responsive dynamic fluorescence anti-counterfeiting. These findings provide new approach for the application of information encryption.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40298-40303"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922723","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}

{"title":"Upconversion luminescence and temperature sensing ability of Eu3+ and Yb3+-codoped Bi2WO6 powder in aqueous environments","authors":"Yan Zhang ,&nbsp;Lin xiang Wang ,&nbsp;Munire Mai maiti ,&nbsp;Meng liang Jiang ,&nbsp;Xin Feng ,&nbsp;Jia chen Shi","doi":"10.1016/j.ceramint.2025.06.246","DOIUrl":"10.1016/j.ceramint.2025.06.246","url":null,"abstract":"<div><div>Bi₂WO₆:x mol% Eu³⁺, y mol% Yb³⁺<span> (x = 1, 3, 6; y = 3, 6, 9) upconversion luminescent materials<span> were prepared using a high-temperature solid-phase method. XRD results revealed that Eu</span></span>³⁺ and Yb³⁺<span> doping did not affect the orthorhombic crystal system structure of the Bi</span>₂WO₆<span> matrix material. SEM results revealed that Bi</span>₂WO₆ powder with 3 mol% Eu³⁺ and 6 mol% Yb³⁺<span> consisted of 0.5–8 μm particles with some agglomeration. SEM mapping and EDS measurements of the powder revealed that the elements were relatively uniformly distributed. Under 980 nm excitation, the Eu</span>³⁺ emission intensity was the greatest for the 3 mol% Eu³⁺ and 6 mol% Yb³⁺-codoped sample. The relationship between the luminescence intensity of the Bi₂WO₆:3 mol% Eu³⁺, 6 mol% Yb³⁺ sample and the pump power was determined for excitation powers ranging from 221 to 441 mW. The results indicated that the emission peaks of Eu³⁺<span> at 475 nm, 521 nm, 541 nm and 649 nm originated from two-photon absorption. Under 980 nm laser excitation, the temperature from 298 K to 573 K was characterized by the intensity ratio of the 475 nm and 541 nm fluorescence from Eu</span>³⁺. The maximum relative temperature sensitivity <em>S</em>_r was 0.022 K^-1 (298 K), and the minimum temperature resolution <em>δT</em><span> was 0.0182 K (298 K). Under the same excitation conditions, for 187 Ntu samples in an aqueous environment, the maximum </span><em>S</em>_r from 336 K to 298 K was 0.025 K^-1 (336 K), and the minimum <em>δT</em><span> was 0.0184 K (336 K). The luminescence color of the powder samples changed between green and blue with increasing temperature, which suggested a potential application in thermochromic optical anticounterfeiting.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40122-40130"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922817","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}

{"title":"Fabrication of Al2O3-based composite ceramics with mesocarbon microbeads as absorbent for enhanced microwave absorption","authors":"Xia Fang ,&nbsp;Qiong Wu ,&nbsp;Zixin Gu ,&nbsp;Shuang Yin ,&nbsp;Haiqiang Ma ,&nbsp;Cong Zhou ,&nbsp;Tianyu Li ,&nbsp;Liqiang Liu ,&nbsp;Ruzhong Zuo","doi":"10.1016/j.ceramint.2025.06.222","DOIUrl":"10.1016/j.ceramint.2025.06.222","url":null,"abstract":"<div><div>While ceramic-based composites containing carbonaceous absorbents show potential for microwave absorption applications, their performance is frequently constrained by impedance mismatch and complicated manufacturing procedures. In this work, we develop lightweight mesocarbon microbead (MCMB)/Al₂O₃<span> composite ceramics with exceptional microwave absorption properties through the strategic incorporation of highly spherical MCMBs into an Al</span>₂O₃<span><span> matrix. A comprehensive investigation of sintering methods (pressureless versus hot-pressing) and MCMB content (5–13 wt%) reveals that hot-pressing sintering marfkedly improved densification and mechanical properties (flexural strength ≥245 MPa) compared to pressureless sintering, owing to enhanced particle rearrangement and pore elimination under applied pressure. The introduction of MCMBs effectively tuned </span>dielectric properties<span> and optimized impedance matching, resulting in superior microwave absorption performance with a minimum reflection loss (</span></span><em>RL</em>_min<span>) of −20.62 dB at 10.84 GHz and an effective absorption bandwidth (EAB) of 1.55 GHz at only 1.8 mm thickness for hot-pressed sintered samples containing 11 wt% MCMBs. The exceptional microwave absorption characteristics stem from synergistic effects<span><span> including conduction loss<span> from MCMB's high electrical conductivity, </span></span>interfacial polarization at MCMB/Al</span></span>₂O₃ heterointerfaces, and optimized microwave scattering enabled by the spherical MCMB morphology. This work demonstrates that synergistic control of sintering methods and MCMB content can concurrently optimize mechanical and microwave absorption properties, offering a promising strategy for structural-functional integrated ceramics in electromagnetic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39886-39898"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922930","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}

{"title":"Quantitative characterization of the relationship between microstructure and high-temperature mechanical properties of clay bricks under service conditions","authors":"Qingyou Zhu,&nbsp;Zhenglong Liu,&nbsp;Yucheng Yin,&nbsp;Bolin Yang,&nbsp;Zhiqiang Liu,&nbsp;Chao Yu,&nbsp;Jun Ding,&nbsp;Hongxi Zhu,&nbsp;Chengji Deng","doi":"10.1016/j.ceramint.2025.06.224","DOIUrl":"10.1016/j.ceramint.2025.06.224","url":null,"abstract":"<div><div>This study investigates the performance degradation mechanisms of clay-brick refractories at high temperatures (900–1300 °C) to ensure compliance with performance requirements under service conditions. The results show that the closely interlocked mullite-corundum structure enables the material to maintain a high strength (74.5 MPa) below 900 °C. However, as temperature increases, the migration of the glass phase, mismatch in thermal expansion, weakening of grain boundaries, and increased liquid-phase content collectively result in a decrease in the mechanical properties. In addition, the increased liquid-phase content in the material weakens the intercrystallite bonding strength, further degrading the mechanical properties of the clay bricks at elevated temperatures. Consequently, the material strength declines sharply to 4.1 MPa at 1300 °C.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39910-39919"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922932","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}

{"title":"Induction of magnetodielectric coupling in multiferroic lanthanum ferrite by cobalt doping","authors":"X.J. Téllez-Tovar ,&nbsp;J.A. Félix-Bernabe ,&nbsp;F. Sánchez-De Jesús ,&nbsp;C.A. Cortés-Escobedo ,&nbsp;A.M. Bolarín-Miró","doi":"10.1016/j.ceramint.2025.06.225","DOIUrl":"10.1016/j.ceramint.2025.06.225","url":null,"abstract":"<div><div><span>This research focuses on studying the magnetodielectric coupling at room temperature in lanthanum<span><span> ferrite induced by cobalt substituting iron sites. The study involved varying cobalt content from 0 to 0.1 mol, with samples synthesized via high-energy ball milling. The evolution of crystal structure, dielectric, and </span>magnetic properties<span> was analyzed. X-ray diffraction (XRD) and Rietveld refinement confirmed the orthorhombic single-phase structure with the </span></span></span><em>Pnma</em><span><span><span> space group in the doped lanthanum ferrite. Vibrating-sample magnetometry results demonstrated that </span>cobalt doping<span> alters the antiferromagnetic order of lanthanum ferrite, inducing ferromagnetism, with a maximum specific magnetization of 1.25 emu/g observed at 0.075 mol cobalt content. Scanning electron microscopy (SEM) analysis revealed an increase in grain size with higher cobalt content, which impacts the material's electrical and </span></span>dielectric properties. The doped ferrites exhibited lower relative permittivity values compared to pure LaFeO</span>₃<span>. Additionally, the presence of cobalt reduced the dielectric dissipation factor, attributed to minor crystal structure distortions. Notably, magnetodielectric coupling was observed in these multiferroic materials for the first time, evidenced by changes in relative permittivity under varying applied fields and frequencies. The highest magnetodielectric coupling was achieved at 0.025 mol cobalt doping, with relative permittivity values ranging from 70 to 26 across frequencies from 50 to 1000 Hz. These findings confirm that cobalt-doped lanthanum ferrites exhibit magnetodielectric coupling at room temperature, suggesting potential for expanded technological applications.</span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39920-39929"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922933","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}

{"title":"Tuning magnetic storage properties through neodymium substitution in CoCr2O4 nanostructures: A chemical synthesis approach and DFT calculations","authors":"Mansour Mohamed ,&nbsp;Li Zhengyou ,&nbsp;Amel Gacem ,&nbsp;Krishna Kumar Yadav ,&nbsp;Ahmed M. Fallatah ,&nbsp;Fahad M. Aldosari ,&nbsp;Ghadah Shukri Albakri ,&nbsp;Javed Khan Bhutto ,&nbsp;Nagaraj Basavegowda ,&nbsp;Muhammad A. Abo El-Khair ,&nbsp;Brij Bhushan ,&nbsp;Marisa C. Oliveira ,&nbsp;Elson Longo ,&nbsp;Renan A.P. Ribeiro","doi":"10.1016/j.ceramint.2025.06.233","DOIUrl":"10.1016/j.ceramint.2025.06.233","url":null,"abstract":"<div><div>Neodymium-doped CoCr₂O₄<span> nanoparticles<span><span><span><span> were synthesized via a chemical synthesis route to investigate their structural, microstructural, compositional, and magnetic properties. X-ray diffraction (XRD) analysis confirmed the formation of a single-phase cubic spinel structure with high </span>crystallinity and slight lattice expansion due to neodymium doping. Scanning Electron Microscopy (SEM) revealed a quasi-spherical morphology with uniform particle distribution, while Energy Dispersive X-ray Analysis (EDAX) confirmed the </span>elemental composition, showing the successful incorporation of neodymium without impurities. </span>Fourier Transform<span> Infrared (FTIR) spectroscopy highlighted characteristic metal-oxygen vibrational bands, with shifts in peak positions reflecting changes in the local bonding environment due to neodymium substitution. Magnetic studies, including field-cooled (FC) and zero-field-cooled (ZFC) measurements, indicated modifications in Curie temperature and magnetic transitions, with doped samples exhibiting enhanced superparamagnetic behavior. DFT calculations were conducted to complement the overall discussion, proving that Nd</span></span></span>³⁺ (4f³<span>) orbitals play a fundamental role on controlling the structural, electronic and magnetic properties of spinel chromites. This study is novel in its combined use of experimental characterization and first-principles DFT calculations to probe the role of Nd</span>³⁺<span> doping in tuning the magnetic and structural behavior of CoCr</span>₂O₄<span>. The integration of low-temperature synthesis with theoretical modeling provides new insights into rare-earth-induced modulation of exchange interactions in spinel chromites<span>, highlighting potential applications in magnetic storage and spintronic devices.</span></span></div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 40001-40011"},"PeriodicalIF":5.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922796","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}