Ceramics International最新文献

{"title":"Cost-effective fabrication of mesoporous alumina nanofibers via electrospinning: Enhanced ceramic-to-polymer ratio","authors":"Leila Sohrabi-Kashani,&nbsp;Seyyed Masih Madani,&nbsp;Hajar Ghanbari,&nbsp;Hossein Sarpoolaky","doi":"10.1016/j.ceramint.2025.01.550","DOIUrl":"10.1016/j.ceramint.2025.01.550","url":null,"abstract":"<div><div>In this paper, inexpensive precursors, such as boehmite, PVA, and silica sol, were used to fabricate alumina mesoporous nanofibers by electrospinning. Producing flexible and continuous ceramic fibers using the electrospinning method is challenging due to the calcination followed by polymer removal. Using boehmite made it possible to increase the ceramic/polymer precursor ratio up to three times without disturbing the electrospinning process, which will extensively improve the quality and decrease the brittleness of the fibers. The phase evolution of the pure alumina and alumina-silica fiber samples heat-treated at 550, 750, and 950 °C were investigated by X-ray diffraction (XRD) analysis. Field-emission electron microscopy (FESEM) analysis showed that the diameter of fibers decreased with the addition of silica and increased calcination temperature. The diameter of alumina-silica fibers reached from 210 ± 50 nm to 160 ± 50 nm after heat treatment at 950 °C. The nanofibers were also characterized by Fourier-transform infrared (FTIR) spectroscopy to investigate their chemical properties. Simultaneous thermogravimetric analysis (STA) indicated that the coexistence of boehmite and PVA shows different thermal behavior, and the presence of silica retards the phase transformations of boehmite as the temperature increases. The as-synthesized γ-Al₂O₃ mesoporous fibers exhibited a surface area of 204 m²/g with an average pore diameter of 9.5 nm, which makes it an acceptable candidate for catalyst support applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17800-17812"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923286","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":"Control of sintering kinetics and thermal shock resistance for stereolithography 3D printed ceramics","authors":"Yuxiang Qiu ,&nbsp;Qiaolei Li ,&nbsp;Jingjing Liang ,&nbsp;Boyang Qu ,&nbsp;Xinzhi Liang ,&nbsp;Shengqi Liu ,&nbsp;Yizhou Zhou ,&nbsp;Xiaofeng Sun ,&nbsp;Jinguo Li","doi":"10.1016/j.ceramint.2025.01.518","DOIUrl":"10.1016/j.ceramint.2025.01.518","url":null,"abstract":"<div><div>Stereolithography has had a transformative impact on the production of complex Al₂O₃ ceramic components. However, the high melting point and inherent brittleness of Al₂O₃ ceramics limit its application in the aerospace field. In this research, we investigated the influence on the microstructure, physical properties, mechanical properties, and thermal shock resistance (TSR) properties of the addition of TiO₂-doped Al₂O₃ ceramics by stereolithography 3D printing technology. This work revealed the relationship between the addition of TiO₂ and the sintering kinetics of Al₂O₃ ceramics. TiO₂ forms Al₂TiO₅ with Al₂O₃ at high temperatures, which promoted the growth of ceramic grains, increased the bulk density, reduced the porosity, and improved the flexural properties of Al₂O₃ ceramics. During the cooling step of the sintering process, the anisotropy of thermal expansion coefficients of Al₂TiO₅ and the difference in thermal expansion coefficients between the different phases (Al₂O₃ and Al₂TiO₅) generate thermal stresses which ultimately cause microcracks in the low strength Al₂TiO₅. The presence of microcracks within the Al₂TiO₅ causes thermal cracks to deflect during expansion, which passivated the crack tip effect. And TiO₂ promoted Al₂O₃ sintering to raise the critical value of crack tip stress. Both mechanisms can improve the residual flexural strength of Al₂O₃ ceramics, thereby improving TSR. Overall, the critical flexural strength of 2 wt% TiO₂/Al₂O₃ was the highest, reaching 165.158 MPa, and the corresponding critical thermal shock temperature difference was 264.10 °C. Based on the above study, samples with high TSR had been successfully produced using stereolithography 3D printing technology, which will promote the application of Al₂O₃ ceramics in the aerospace field.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17453-17462"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923005","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":"Plasma sprayed thermal barrier coatings with outstanding ultrahigh temperature thermal shock resistances through gradient porosity level optimizations","authors":"Liqiang Liu ,&nbsp;Wenhu Xu ,&nbsp;Junmiao Shi ,&nbsp;Xian-Cheng Zhang ,&nbsp;Shan-Tung Tu","doi":"10.1016/j.ceramint.2025.01.521","DOIUrl":"10.1016/j.ceramint.2025.01.521","url":null,"abstract":"<div><div>In this study, the YSZ thermal barrier coatings (TBCs) with gradient porosity was developed through design the spraying parameters. The effect of the gradient porosity on the bond strength and thermal shock life was investigated, and the failure mechanism of the TBCs was explored. This article prepared three coatings with different porosities, tested the bonding strength of different porosities using the tensile method, and tested the thermal shock resistance of the coatings using water quenching after thermal shock. By simulating the residual stress inside the coatings after spraying, the failure mechanism of the coatings after thermal shock was analyzed. With the decrease of the porosity from TBC I to TBC III, the residual stress concentration after the spraying raised. Subsequently, the bond strength of the TBCs decreased form 37 MPa–31 MPa owing to the residual stress evolution. All of the three TBCs underwent three thermal shock test without macroscopic spalling. During the thermal shock test, tensile horizontal stress formed and promoted the formation of vertical cracks. Tensile vertical stress concentrated at the top - coat/bond - coat (TC/BC) interface significantly, inducing horizontal crack adjacent to the interface. Additionally, the TC layer surface zone sintered under the oxygen-acetylene flame heating. Then tensile vertical stress concentration was formed in the sintering zone region, and horizontal crack was detected in the TC layer. The connection of the vertical cracks and horizontal cracks was responsible for the spalling and failure of the TC layer.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17484-17491"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923007","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":"Impact of Bi2O3/CdO replacement on physical, FTIR, and optical properties of high dense new CdO-BaO-Bi2O3-SiO2 glass system","authors":"Norah A.M. Alsaif ,&nbsp;Nada Alfryyan ,&nbsp;Hanan Al-Ghamdi ,&nbsp;Y.S. Rammah ,&nbsp;Ebrahim A. Mahdy ,&nbsp;H.A. Abo-Mosallam ,&nbsp;A.S. Abouhaswa ,&nbsp;Marwa A. El-Sayed","doi":"10.1016/j.ceramint.2025.01.568","DOIUrl":"10.1016/j.ceramint.2025.01.568","url":null,"abstract":"<div><div>The melt-quenching technique was used to prepare cadmium barium silicate glass samples doped with Bi₂O₃. The glass samples that were prepared (Y = 0.0, 10, 20, and 30 % mol%) have a chemical composition of (50-Y)CdO-10BaO-40SiO₂-YBi₂O₃. X-ray diffraction (XRD) analysis was utilized to investigate the amorphous character of the produced glasses, while Fourier transform infrared spectroscopy (FTIR), density (ρ), molar volume (V_m), and crystal volume (V_c) were employed to study structural alterations. Furthermore, the optical properties of the glasses were estimated. XRD measurements verified that the synthetic glasses were amorphous. Replacements of Bi₂O₃/CdO led to an increase in the density of produced glasses from 4.87 to 6.74 g/cm³. However, similar behavioral trends were observed for the physical parameters V_m and V_c. FTIR measurements have confirmed that silicon requires more oxygen due to the conversion of SiO₂ units into SiO₄ in the glass networks, which increases cross-linkage in the glass network. The direct optical gap (E_indirect) reduced from 3.25 eV to 3.13 eV, whereas E_direct was declined from 3.38 eV to 3.27 eV. The Urbach's energy (ΔE) declined from 0.16 eV to 0.12 eV. The optical density (OD) parameter was in a strong correlation with the absorption coefficient (α) of the investigated glasses. The sample 20CdO-10BaO-30Bi₂O₃-40SiO₂ possessed a high significant increase in the opacity. Results confirmed that the suggested GBi glassy samples can be used in optical applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17936-17944"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923012","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 low temperature co-fired strontium aluminoborate ceramic with low permittivity for microwave applications","authors":"Haiquan Wang ,&nbsp;Wenjie Zhang ,&nbsp;You Wu ,&nbsp;Xiaobin Liu ,&nbsp;Fangyi Huang ,&nbsp;Huanfu Zhou","doi":"10.1016/j.ceramint.2025.01.504","DOIUrl":"10.1016/j.ceramint.2025.01.504","url":null,"abstract":"<div><div>A novel MWDC composed of SrAl₂B₂O₇-base (SAB) with low permittivity was synthesised in this research. The sintering behaviour, microstructures, and dielectric properties of SAB ceramics were studied. SAB sintered at 890 °C showed excellent performance with Quality factor (<em>Q×f</em>) of 27400 GHz, relative permittivity (<em>ε</em>_<em>r</em>) of 4.4, and temperature coefficient of resonant frequency (<em>τ</em>_<em>f</em>) of 29.7 ppm/°C. The potential of SAB as a sintering additive for LCSS ceramics was investigated due to its low <em>ε</em>_<em>r</em> and low sintering temperature. The results show that a moderate amount of SAB helps to improve the densification of LCSS and hence the <em>Q×f</em> value. Excellent performance is obtained at 900 °C for Li₄CaSr(SiO₄)₂ (LCSS) added with 2 wt% SAB: <em>ε</em>_<em>r</em> = 7.5, <em>Q×f</em> = 59614 GHz, <em>τ</em>_<em>f</em> = −75.8 ppm/°C. Moreover, the analyses demonstrated that SAB and LCSS + 2 wt% SAB ceramics exhibit high compatibility with Ag, suggesting their potential suitability for application in LTCC.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17311-17317"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923189","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":"Impact of synthesis methods and coordination agents on the structure, morphology, and luminescent efficiency of triple-doped Nd3+, Yb3+ and Tm3+ yttrium orthovanadate","authors":"María Rapp ,&nbsp;Elisa Ortiz-Rivero ,&nbsp;Josefa Isasi ,&nbsp;Mauricio Alcolea Palafox","doi":"10.1016/j.ceramint.2025.01.583","DOIUrl":"10.1016/j.ceramint.2025.01.583","url":null,"abstract":"<div><div>The research and study of novel fluorescent nanomaterials based on lanthanide ions that can be excited by infrared radiation is essential for the development of new technologies in the biomedicine, photonics, and optoelectronics fields. The present work focuses on the structural and morphological study of new orthovanadate Y_0.9Nd_0.02Tm_0.03Yb_0.05VO₄ and Y_0.9Nd_0.02Tm_0.05Yb_0.03VO₄ samples. Their optical properties were also analyzed, including the evaluation of up-conversion (UC) and down-conversion (DS) mechanisms under infrared excitation at 980 nm and 808 nm. The samples were synthesized using both the sol-gel method and hydrothermal synthesis with urea and citric acid (CA) or maleic acid (MA) addition. These samples were reacted with tetraethyl orthosilicate (TEOS) to obtain silica-coated samples. X-ray diffraction (XRD) analysis confirmed the tetragonal symmetry compatible with a zircon-type structure of the diffraction pattern. FTIR spectra revealed bands corresponding to the several vibrational modes of VO₄ ³⁻ groups and the presence of silica in the TEOS-treated samples. The synthesis method and the addition of CA or MA influenced the agglomeration, shape and morphology of the particles, as evidenced by transmission electron microscopy images. Photoluminescence (PL) studies of investigated samples after being excited with infrared radiation provided a detailed description of the energy transfer mechanisms involved in the DS and UC processes. These processes are related to the synthesis method used to obtain them and to the chelating agents added. Excitation of the samples at 808 nm generates DS processes and PL spectra with bright emission bands corresponding to electronic transitions of the Nd³⁺ and Yb³⁺ ions, while excitation at 808 and 980 nm gives rise to UC processes and PL spectra showing intense blue, red and NIR-I emission bands of Tm³⁺ ions, along with green and red emissions of Nd³⁺ ions.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 18073-18085"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923206","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":"Microstructural and mechanical properties of reaction-bonded silicon carbide (RBSiC) brazed with Si-Ti eutectic alloy","authors":"Xiaoqian Xue ,&nbsp;Fugang Lu ,&nbsp;Jia Yang ,&nbsp;Yibo Fu ,&nbsp;Tong Wu ,&nbsp;Qiuguang Zhang ,&nbsp;Ce Wang ,&nbsp;Yongkang Dong ,&nbsp;Panpan Lin ,&nbsp;Tiesong Lin ,&nbsp;Peng He","doi":"10.1016/j.ceramint.2025.01.490","DOIUrl":"10.1016/j.ceramint.2025.01.490","url":null,"abstract":"<div><div>The self-joining of Reaction-Bonded Silicon Carbide (RBSiC) was achieved using a Si-Ti eutectic alloy via vacuum brazing, offering a novel approach for high-performance SiC component integration. This study provides a comprehensive investigation into the wetting behavior of the Si-Ti eutectic on RBSiC, coupled with a detailed analysis of how brazing temperature influences joint microstructure, mechanical properties, and fracture morphology. The Si-Ti eutectic alloy exhibits an exceptionally low contact angle of 15° on the RBSiC surface, indicating superior wettability and spreading characteristics critical for robust bonding. The joints were primarily formed through atomic-scale interactions, with no new intermetallic compounds generated, ensuring the long-term stability of the interface. Brazing at 1375 °C for 15 min resulted in a shear strength of 154 MPa, with fracture occurring at the substrate, highlighting the excellent mechanical properties of the joints. The evolution of the joint microstructure and the underlying strengthening mechanisms were elucidated, providing insights into the intrinsic behavior of the bonding process. This pressureless joining technique paves the way for broader applications of high-performance SiC components, particularly in industries demanding advanced material integrity and reliability.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17162-17171"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922769","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 and characterization of novel sodium zirconate layers produced via chemical conversion of (Zr-Nb) thin films on biodegradable Mg for bone-fixation applications","authors":"Somayeh Azizi ,&nbsp;Mohammad Hossein Ehsani ,&nbsp;Amir Zareidoost ,&nbsp;Atena Malakpour-Permlid ,&nbsp;Anja Boisen ,&nbsp;Fatemeh Ajalloueian","doi":"10.1016/j.ceramint.2025.01.534","DOIUrl":"10.1016/j.ceramint.2025.01.534","url":null,"abstract":"<div><div>Biodegradable Mg alloys have considerable promise for use in bone-fixation devices. Nonetheless, their clinical application is limited due to the high degradation rate of Mg, leading to deterioration of the mechanical properties, and drastic change in pH of the surrounding cellular environment of the implant during the healing process. Recently, the use of Na-containing biocompatible coatings on the Mg surface has created an innovative approach to overcome the above problems. In this study, a newly developed sodium–containing zirconate hydrogel layer with an amorphous structure has been designed and prepared through modification of the Nb-containing (Zr-Nb) thin films sputtered directly on pure Mg using wet chemical conversion in aqueous NaOH solution. The results of the Grazing incidence angle X-ray diffraction (GI-XRD), X-ray photoelectron spectroscopy (XPS), and Energy dispersive Spectroscopy (EDS) analyses have certified the formation of the desired layer on top of the thin films, indicating that ion exchange and chemical conversion between the surface layers and solution has been limited to less than 200 nm from the (Zr-Nb) thin film thickness, but without the morphological changes in the thin film's surface layers. In terms of reducing Mg degradation, the NaOH-treated sample has been demonstrated to be superior, compared to the other samples tested, representing a decrease in the corrosion rate (CR) from 3.49 mm.y⁻¹ to 0.75 mm.y⁻¹, increase in the corrosion resistance (Rp) from 181.32 Ω cm² to 1911 Ω cm². This increase in corrosion resistance can be ascribed to the Na ⁺ ions released from the modified layers, resulting in a change in the pH and composition of the surrounding solution environment. Mechanically, the indentation and nano-scratch testing results have explained a slight increase in Young's modulus of the NaOH-treated thin film compared to the untreated one and maintained the thin film's scratch properties after and before the chemical surface treatment which can be attributed to the thickness (&lt;200 nm) of the modified layer. Cell culture studies have demonstrated enhanced cell viability of MG-63 cells in the NaOH-modified surfaces compared to the un-modified ones. These results demonstrate that the zirconate sodium layers have created the protective effect, appropriate cellular response, and nano-mechanical properties illustrating their potential for use in biodegradable bone-fixation devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17607-17622"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922918","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":"Enhancement of microwave absorption properties of Sr2+-doped CaMnO3 synthesized by Sol-Gel","authors":"Kaiheng Chang ,&nbsp;Fengjiao Qian ,&nbsp;Zhuqing Sun ,&nbsp;Yuzhou Gu ,&nbsp;Chuyang Liu ,&nbsp;Hao Yang","doi":"10.1016/j.ceramint.2025.01.519","DOIUrl":"10.1016/j.ceramint.2025.01.519","url":null,"abstract":"<div><div>CaMnO₃ has garnered significant attention due to its remarkable thermoelectric properties. The high-temperature stability and dielectric characteristics of CaMnO₃ could also underscore its potential as a microwave absorbing material. In this study, we reported the microwave absorption properties of CaMnO₃ prepared by two different methods, solid-state reaction and sol-gel methods. The influence of the preparation method on the morphology and physical properties of CaMnO₃ was studied. The results showed that the samples prepared by sol-gel method display much stronger reflection loss and wider absorption bandwidth. Based on the sol-gel method, the effect of Sr²⁺-doping on the absorption properties of CaMnO₃ was also investigated. At Sr²⁺ doping concentration of 5 %, CaMnO₃ displays remarkable reflection loss value of −45.96 dB accompanied with a broad effective absorption bandwidth of 5.04 GHz (8.5–13.5 GHz) covering the full X-wave band (8–12 GHz). Our results greatly extend the application frequency window of CaMnO₃ from the high frequency Ku-wave band reported in the literature to the lower X-wave band, demonstrating CaMnO₃ as an outstanding X-wave band absorber.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17463-17472"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923004","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":"Enhancing the thermoelectric performance of BiCuSeO ceramics by entropy engineering","authors":"Jialing Jiang ,&nbsp;Honglei Wang ,&nbsp;Zhenjiu Xu ,&nbsp;Zhuang Fu ,&nbsp;Lijun Zhao ,&nbsp;Lei Wang ,&nbsp;Songtao Dong ,&nbsp;Hongbo Ju","doi":"10.1016/j.ceramint.2025.01.499","DOIUrl":"10.1016/j.ceramint.2025.01.499","url":null,"abstract":"<div><div>Bi_{1−3<em>x</em>−<em>y</em>−<em>z</em>}Al_<em>x</em>La_<em>x</em>Sb_<em>x</em>Y_<em>y</em>Ca_<em>z</em>CuSeO (<em>x</em> = <em>y</em> = <em>z</em> = 0; <em>x</em> = 0.02, <em>y</em> = <em>z</em> = 0; <em>x</em> = <em>y</em> = 0.02, <em>z</em> = 0; and <em>x</em> = <em>y</em> = <em>z</em> = 0.02) ceramics were prepared using a combination of high-energy ball milling, cold-isostatic pressing, and sintering. Results demonstrated that the incorporation of multiple elements led to an increase in the carrier concentration within the BiCuSeO system, resulting in enhanced electrical conductivity. In particular, the electrical conductivity of the system increased from 9.10 S cm⁻¹ (BiCuSeO) to 66.96 S cm⁻¹ (Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO) at 323 K. Furthermore, the maximum power factor value of Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO was found to be 421.71 μW m⁻¹ K⁻² at 773 K. After doping, the thermal conductivity of the system decreased from 0.57 to 0.29 W m⁻¹ K⁻¹ at 773 K. The <em>ZT</em>_max value of Bi_0.90Al_0.02La_0.02Sb_0.02Y_0.02Ca_0.02CuSeO was ∼1.06, representing a considerable improvement of approximately 4.2 times compared to that of the pure sample (∼0.25). These findings suggest that the incorporation of multiple elements through doping offers a promising strategy for enhancing the thermoelectric performance of BiCuSeO.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 13","pages":"Pages 17259-17267"},"PeriodicalIF":5.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923184","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}