Ceramics International最新文献

{"title":"A green inorganic binder for material extrusion of ultra-low shrinkage and relatively high strength metakaolin ceramics at low sintering temperature","authors":"Fuchu Liu ,&nbsp;Ming Wu ,&nbsp;Yuxiao Lin ,&nbsp;Miao Wang ,&nbsp;Yi Wang ,&nbsp;Yaowu Zheng ,&nbsp;Qinglei Sun ,&nbsp;Wentao Xu ,&nbsp;Hao Liu ,&nbsp;Guangchao Han","doi":"10.1016/j.ceramint.2024.09.391","DOIUrl":"10.1016/j.ceramint.2024.09.391","url":null,"abstract":"<div><div>Ultra-low shrinkage and relatively high strength metakaolin ceramics printed by material extrusion were innovatively fabricated using inorganic aluminum dihydrogen phosphate (Al(H₂PO₄)₃) as a binder and low sintering temperature. The optical microscopy, scanning electron microscopy (SEM), electronic vernier caliper, three-point bending test, Archimedes method and X-ray diffraction (XRD) were used to measure and evaluate the surface morphology, microstructure, dimensional shrinkage, flexural strength, porosity and phase composition of the printed ceramics sintered at different temperatures. The results showed that when the mass ratio of metakaolin, Al(H₂PO₄)₃ and deionized water was 17:6:2, the rheological characteristic of the purely green inorganic ceramic slurry was very suitable for material extrusion additive manufacturing, and the corresponding printed ceramic green bodies possessed high-quality formability. The ceramic samples sintered at 750 °C possessed the best whiteness, the lowest shrinkage (&lt;2 %), relatively high flexural strength (9.02 MPa). As the sintering temperature increased, Al(H₂PO₄)₃ transformed to aluminum metaphosphate Al(PO₃)₃, and then decomposed into aluminum phosphate (AlPO₄) and phosphorus pentoxide gas (P₂O₅), which caused pores and reduced strength, and alumina oxide (Al₂O₃) and silicon oxide (SiO₂) in metakaolin gradually transformed to mullite and cristobalite with more stable structure and higher strength.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50454-50468"},"PeriodicalIF":5.1,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700323","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":"Novel B4C supports for ceramic membrane filtration","authors":"Juan R. Madrigal ,&nbsp;Manuel A. García-Galán ,&nbsp;Fernando Guiberteau ,&nbsp;Victor M. Candelario ,&nbsp;Angel L. Ortiz","doi":"10.1016/j.ceramint.2024.09.389","DOIUrl":"10.1016/j.ceramint.2024.09.389","url":null,"abstract":"<div><div>Novel complex-shaped porous B₄C supports were fabricated for use in ceramic membrane filtration applications, the processing of which is described in detail. Firstly, an extrudable ceramic paste was formulated and homogenised, containing a high content of B₄C of super-coarse and ultrafine grades, plus water as liquid medium and various organic additives as thickener, binder, plasticiser, and lubricant. Secondly, tubular honeycomb parts (<em>i.e.</em>, cylinders of ∼26 mm outer diameter with 30 inner channels of 3 mm diameter each) were extruded at ∼25 bar and dried in air at 120 °C for 24 h, resulting in robust green B₄C membrane supports without macro- or micro-defects. Thirdly, suitable debinding conditions were identified by thermogravimetry of the paste and its components, and the dry membrane supports were debinded at 700 °C for 1.5 h in high vacuum (&lt;0.1 Pa) confirming that they retain their shape with minimal isotropic shrinkage (∼0.13–0.15 %). And fourthly, the debinded membrane supports were pressureless sintered at 2000 °C for 3 h in inert atmosphere undergoing only an additional 1 % isotropic shrinkage, resulting in B₄C membrane supports with low apparent density (∼0.89(1) g/cm³), high porosity (∼38–39 %), open interconnected micrometre pores (in the range ∼0.5–16 μm, and <em>d</em>_<em>50</em>∼1.5 μm), and low skeletal density (∼2.455(1) g/cm³). Importantly, their only partial densification makes them both sufficiently strong mechanically (∼68(2) MPa compressive strength) and highly permeable to water (∼13131(418) l/(m²·h·bar) permeability at ∼1.3 bar). These attributes, together with the intrinsic lightness and durability of B₄C ceramics, make these novel supports in principle very appealing for ceramic membrane filtration and other applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50436-50443"},"PeriodicalIF":5.1,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of g-C3N4 and rGO incorporation on the physical properties and photocatalytic application of TiO2 particles through a simple and cost-effective synthesis method","authors":"Aminreza Beizavi ,&nbsp;Mehdi Boroujerdnia","doi":"10.1016/j.ceramint.2024.09.376","DOIUrl":"10.1016/j.ceramint.2024.09.376","url":null,"abstract":"<div><div>This research examined the effect of adding carbon-based materials, including graphitic carbon nitride (g-C₃N₄) and reduced graphene oxide (rGO), to titanium dioxide (TiO₂) particles for photocatalytic applications using a simple and cost-effective mechanical grinding method. The results indicated that the composite samples had larger crystallite sizes (19.28–22.86 nm) and lower strain than the TiO₂ sample. Morphological analysis showed that, while the addition of g-C₃N₄ and rGO did not alter the spherical shape of the TiO₂ particles, it did reduce their average size. The TiO₂ particles exhibited oxygen-poor stoichiometry, which was further intensified by the incorporation of g-C₃N₄ and rGO. Optical analysis revealed that the TiO₂ sample has an optical energy band gap of approximately 2.94 eV, which was increased by adding of g-C₃N₄ and rGO. Additionally, the composite samples showed lower radiative recombination compared to the TiO₂ sample. The photocatalytic experiment demonstrated a maximum degradation of 98 % of methylene blue by the g-C₃N₄/rGO/TiO₂ sample under UV illumination after 90 min.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50317-50326"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700389","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":"Aramid nanofiber-reinforced carbon nanotubes@cobalt ferrite nanoparticles aerogel films achieve excellent electromagnetic interference shielding, photothermal and joule heating performance","authors":"Heng Wei ,&nbsp;Tengfei Lei ,&nbsp;Libiao Ma ,&nbsp;Weihua Li","doi":"10.1016/j.ceramint.2024.09.384","DOIUrl":"10.1016/j.ceramint.2024.09.384","url":null,"abstract":"<div><div>We embedded cobalt ferrite (CoFe₂O₄, CFO) nanoparticles on carbon nanotubes (CNTs) through oxidation and wet chemical methods to prepare CNT@CFO. Subsequently, aramid nanofiber (ANF)-reinforced aerogel films CNT@CFO/ANF were prepared by vacuum-assisted filtration and freeze-drying. CNT@CFO is evenly interspersed in the ordered ANF layers, giving the aerogel film excellent flexibility and stretchability. In electromagnetic interference shielding (EMI SE) applications, electromagnetic coupling and rich heterogeneous interfaces alleviate impedance mismatch and improve the attenuation of electromagnetic waves. The CNT@CFO/ANF film with a thickness of 30 μm exhibits an EMI SE value of 35 dB in the X-band. The absorption coefficient of CNT@CFO/ANF exceeds 0.9, which effectively reduces secondary reflection pollution compared with CNT/ANF. In photothermal conversion applications, the dual light absorption of conjugated CNTs and semiconductor CFO enables the composite film to exhibit rapid and stable photothermal heating. At AM 1.5G intensity, the stable temperature of CNT@CFO/ANF is 60.1 °C, which is higher than that of CNT/ANF. In addition, the CNT conductive network enables films to achieve rapid response, adjustable, and long-term stable joule heating capabilities. These results indicate that CNT@CFO/ANF aerogel films prepared by a simple and efficient method have great application potential in the field of multifunctional flexible devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50388-50396"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700388","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":"A novel Co-free and efficient Pr0.5Ba0.5Fe0.8Cu0.2O3-δ nanofiber cathode material for intermediate temperature solid oxide fuel cells","authors":"Youjie Zhang ,&nbsp;Jie Yang ,&nbsp;Defeng Zhou ,&nbsp;Xiaofei Zhu ,&nbsp;Ning Wang ,&nbsp;Jinghe Bai ,&nbsp;Yaping Zhang ,&nbsp;Yuqian Wang ,&nbsp;Wenfu Yan","doi":"10.1016/j.ceramint.2024.09.369","DOIUrl":"10.1016/j.ceramint.2024.09.369","url":null,"abstract":"<div><div>Fe-based perovskite without Co has a low thermal expansion coefficient and can be used as a solid oxide fuel cell (SOFC) cathode to ensure the thermal compatibility with the electrolyte; however, its further advancement is impeded by sluggish oxygen reduction reaction (ORR) dynamics. In this work, the electrospinning method and Cu doping strategy are employed to improve the microstructure and oxygen reduction kinetics of Pr_0.5Ba_0.5FeO_3-δ cathodes. The results show that Pr_0.5Ba_0.5Fe_0.8Cu_0.2O_3-δ has a unique fiber structure and high specific surface area, and the introduction of Cu facilitates the release of lattice oxygen, effectively increasing the oxygen vacancy content. The relaxation time distribution analysis and oxygen reduction reaction dynamics indicate that the oxygen adsorption-dissociation process is the main rate-limiting step in the oxygen reduction reaction of Pr_0.5Ba_0.5Fe_0.8Cu_0.2O_3-δ electrode materials. At 700 °C, the area-specific resistance (ASR) of the symmetric cell of Pr_0.5Ba_0.5Fe_0.8Cu_0.2O_3-δ fiber material is 0.071 Ω cm², and the power density of the single cell reaches 988 mW cm⁻², which shows good electrochemical output performance and long-term operational stability. The preparation of nanofiber cathodes with high specific surface area and porosity by electrospinning provides an effective strategy to enhance the electrocatalytic activity of the IT-SOFC cathode.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50242-50251"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700379","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":"Antimicrobial studies of visible light-responsive nanoflower spheres Bi2WO6/ZnO","authors":"Luyin Zhao ,&nbsp;Jingmei Li ,&nbsp;Jiayun Shao ,&nbsp;Ling Zhang ,&nbsp;Yuhao Ji ,&nbsp;Xiulong Li ,&nbsp;Dianmin Ju","doi":"10.1016/j.ceramint.2024.09.207","DOIUrl":"10.1016/j.ceramint.2024.09.207","url":null,"abstract":"<div><div>The contamination of water resources in recent years has resulted in the dissemination of harmful bacteria via water sources, posing a significant threat to the safety and well-being of humans, animals, and plants. Consequently, there is a growing concern over the health and sanitation of water resources. Photocatalysis, a novel and very effective antibacterial method, has gained significant attention in the area of antibacterial research. Bismuth nitrate pentahydrate and sodium tungstate dihydrate were used in a straightforward hydrothermal process to create nanoflower spheres Bi₂WO₆/ZnO photocatalytic composites in molar ratios of 1:1, 1:2, 1:3, and 1:4. The first-ever demonstration of the photocatalytic broad-spectrum antibacterial activity of porous nanoflower spheres Bi₂WO₆/ZnO composites was shown. The samples were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and ultraviolet–visible spectroscopy (UV–vis). The antibacterial activity was evaluated using the dilution coated plate technique, with LED light irradiation. The findings indicate that the Bi₂WO₆/ZnO composite has a much superior antibacterial activity against both bacteria and fungus compared to individual Bi₂WO₆ and ZnO. When exposed to LED lighting with an intensity of 35 W, the Bi₂WO₆/ZnO nanoparticles in a 1:2 ratio at a concentration of 1000 mg/L demonstrated complete antibacterial effectiveness against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus subtilis within 30 min. Similarly, the nanoparticles achieved 100 % antibacterial efficiency against Candida albicans within 90 min. The antibacterial efficacy of 1000 mg/L 1:2 Bi₂WO₆/ZnO nanoparticles against Escherichia coli and Staphylococcus aureus was found to be 100 % within 5 min under natural lighting conditions. The findings indicate that Bi₂WO₆/ZnO nanoparticles have excellent photocatalytic broad-spectrum antibacterial efficacy.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 48948-48966"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664294","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":"Geopolymer-hydroxyapatite composite foams for wastewater remediation","authors":"Elettra Papa,&nbsp;Valentina Medri,&nbsp;Elena Landi","doi":"10.1016/j.ceramint.2024.09.383","DOIUrl":"10.1016/j.ceramint.2024.09.383","url":null,"abstract":"<div><div>Two types of monolithic geopolymer-hydroxyapatite (HA) foams, different in terms of porosity, were produced by direct foaming through the addition of metallic silicon as blowing agent. The ability of the geopolymer to bind HA allowed an easy shaping and consolidation of the material. The total porosity of the two foams ranged from 72 to 87 % with similar surface areas (26–27 m² g⁻¹) despite different HA content (27 and 21 wt% respectively). Composite foams were compared with the pure geopolymer matrix assessing the surface electrostatic characteristics and testing methylene blue (MB) removal at pH = 7. At long times (24h) the best performing monolithic foam reached a removal efficiency of 76 % and 69 % respectively in 10 ppm and 50 ppm MB solution, while granulated foams reached an efficiency of 85 %. The best experimental data fit with the pseudo-second-order kinetic model indicating the chemisorption of MB.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50377-50387"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving the durability and investing failure behavior of TBCs under thermal cycling-CMAS test by Yb2O3 and Y2O3 co-stabilized ZrO2 materials and different processes","authors":"Yangguang Liu ,&nbsp;Wenkang Zhang ,&nbsp;Weize Wang ,&nbsp;Wei Liu ,&nbsp;Ting Yang ,&nbsp;Kaibin Li ,&nbsp;Xiaoqin Zhang ,&nbsp;Junhao Wang ,&nbsp;Xiaofeng Zhao ,&nbsp;Lirong Luo ,&nbsp;Jin Yang ,&nbsp;Chengcheng Zhang","doi":"10.1016/j.ceramint.2024.09.250","DOIUrl":"10.1016/j.ceramint.2024.09.250","url":null,"abstract":"<div><div>Under extremely complex conditions, extending the lifetime of thermal barrier coatings (TBCs) is a challenge. In the present study, optimization of the coating structure and selection of coating materials are beneficial for improving the lifetime of TBCs under thermal cycling-CMAS (calcium-magnesium-alumina-silicate) test. It is efficient to obtain different layer thicknesses of multi-layer coating, including the micro-nano dual-scale layer, the dense YbYSZ layer (4.0 mol % Yb₂O₃ and 0.5 mol% Y₂O₃ co-stabilized ZrO₂), the porous YbYSZ layer and the laser 3D texturing layer, using the computational model under thermal load. Based on the corresponding coating structure and YbYSZ material, bond strength and thermal cycling-CMAS lifetime are evaluated, and compared with those of YSZ (4.5 mol % Y₂O₃ stabilized ZrO₂) coating. The results reveal that TBCs with porous embedded particle cluster (PEPC) structure is lower than that of YSZ coating. In addition, the original defects in multi-layer coating with grid texture reduce the bond strength. The lifetime of multi-layer coatings with a punctate texture are significantly improved in the thermal cycling-CMAS test, and their failure behavior includes fragmented and bulk-like exfoliation. This study emphasizes that combination of materials modification and structure optimization are a promising strategy to extend lifetime of TBCs.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49095-49111"},"PeriodicalIF":5.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664285","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":"Optimizing BHF/PVDF composites via compression molding for high-frequency applications and electromagnetic shielding","authors":"Moustafa A. Darwish ,&nbsp;Nagy L. Torad ,&nbsp;Di Zhou ,&nbsp;Ibrahim M. Maafa ,&nbsp;Ayman Yousef ,&nbsp;A. Uddin ,&nbsp;M.M. Salem","doi":"10.1016/j.ceramint.2024.09.371","DOIUrl":"10.1016/j.ceramint.2024.09.371","url":null,"abstract":"<div><div>Electromagnetic interference (EMI) poses significant challenges to the reliable operation of communication systems, medical devices, and electronic equipment, often resulting in signal degradation, data loss, and equipment failure. To mitigate these issues, this study investigates the development of barium hexaferrite (BHF)/polyvinylidene fluoride (PVDF) composites, synthesized via compression molding, to optimize their electrical and magnetic properties for high-frequency EMI shielding applications. Through comprehensive characterization, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and vector network analysis (VNA), we demonstrate that increasing the BHF content within the composites enhances their complex permittivity, impedance matching, and attenuation coefficients, making them highly effective for EMI shielding. Notably, the composite containing 20 wt% PVDF achieved a reflection loss (<em>RL</em>) of −42 dB at a thickness of 2 mm, indicating superior shielding effectiveness. These results underscore the potential of BHF/PVDF composites as a viable solution for advanced EMI suppression in high-frequency electronic and military applications, combining economic feasibility with robust performance.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50263-50270"},"PeriodicalIF":5.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699937","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":"Unraveling the photophysical response of BaLaLiTeO6:Dy3+ double perovskites with excellent thermal stability for colour tunable LEDs and optical thermometry","authors":"A.K. Sreelekshmi ,&nbsp;Sajan P. Shamsudeen ,&nbsp;S. Deepa Rani ,&nbsp;Deepa N. Bhadran ,&nbsp;R.G. Abhilash Kumar","doi":"10.1016/j.ceramint.2024.09.374","DOIUrl":"10.1016/j.ceramint.2024.09.374","url":null,"abstract":"<div><div>The quest for reliable phosphors has accelerated amidst a growing demand for cost-effective, high-performance multifunctional phosphors. Incorporating thermometric application into double perovskite phosphors can enhance their multifaceted features for diverse applications. The present work endeavours to develop a series of BaLaLiTeO₆:Dy³⁺ double perovskites via a solid-state reaction route, stressing their application in next-generation colour-tunable LEDs and non-contact luminescence thermometry. X-ray diffraction, Raman and FTIR spectroscopy analysis were done to make inferences about the structural modifications induced by the substitution of Dy³⁺ at the La³⁺ site of BaLaLiTeO₆. An extensive investigation of optical characteristics was carried out by diffuse reflectance spectroscopy, photoluminescence spectroscopy and decay curve analysis. Prominent photometric parameters were also evaluated to assess the commercial feasibility of the developed phosphors in photonic applications. Judd-Ofelt parameters were estimated from the photoluminescence excitation spectra of BaLaLiTeO₆:Dy³⁺ for the first time. Furthermore, the values of radiative parameters, fluorescence decay time and quantum efficiency suggested the suitability of the developed phosphor as a competent material. A comprehensive analysis of BaLaLiTeO₆:Dy³⁺ as a thermographic phosphor was done by temperature-dependent photoluminescence spectroscopy. The potential use of this material in luminescence temperature sensing was probed by estimating the thermometric figures of merit based on the fluorescence intensity ratio (FIR). An absolute sensitivity of 22.17 <span><math><mrow><mo>×</mo></mrow></math></span> 10⁻⁴ K⁻¹ was achieved at a temperature of 500 K and a remarkable maximum relative sensitivity of 2.34 %K⁻¹ was attained at 250 K, which is much higher than other Dy³⁺ substituted thermographic phosphors. All these culminated features of BaLaLiTeO₆:Dy³⁺ phosphor proved their prospective applications in thermally stable colour-tunable LEDs, wLEDs and as non-contact optical temperature sensors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50291-50308"},"PeriodicalIF":5.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700384","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}