Journal of Electroceramics最新文献

{"title":"Effect of sintering temperature on structural phase coexistence, microstructure, and electromechanical properties of (1 − x) (K0.5Na0.5)NbO3 – xBaTiO3 (x = 0.06) lead-free ceramics","authors":"M. Balakrishna,&nbsp;P. H. K. Charan,&nbsp;K. P. Suhasini,&nbsp;P. Suresh Patnaik,&nbsp;R. Neeraja,&nbsp;M. Papi Naidu,&nbsp;M. Ramanaiah","doi":"10.1007/s10832-025-00444-7","DOIUrl":"10.1007/s10832-025-00444-7","url":null,"abstract":"<div><p>This work systematically examines the effects of spark plasma sintering (SPS) temperature on the phase structure, microstructure evolution, and multifunctional properties of (1 − <i>x</i>)(K_0.5Na_0.5)NbO₃ – <i>x</i>BaTiO₃ (<i>x</i> = 0.06) :KNN–BT ceramics sintered at 950 °C and 1050 °C lead-free ceramics near the morphotropic phase boundary (MPB). X-ray diffraction and Rietveld refinement revealed the coexistence of orthorhombic (Amm2) and tetragonal (P4mm) phases, with sintering at 1050 °C inducing enhanced crystallinity, increased average crystallite size (from ~ 138 nm to ~ 165 nm), and reduced microstrain (0.56% to 0.29%), indicative of lattice relaxation and defect reduction. Microstructural analysis showed near-full densification (&gt; 99%) and controlled grain growth, yielding uniform grain size (~ 2.66 μm) and minimized porosity, which suppress grain boundary diffusion and enhance mechanical integrity. Dielectric characterization demonstrated a pronounced increase in relative permittivity (ε_r) from 3500 to 4800 and an elevation in Curie temperature (from ~ 280 °C to ~ 343 °C), reflecting improved polarizability and domain stability linked to enhanced grain connectivity and reduced domain wall pinning. The diffuseness parameter (γ) decreased from 1.83 to 1.71, indicating a transition toward sharper ferroelectric phase transitions with higher sintering temperature. Mechanical hardness improved substantially from 4.82 ± 0.15 GPa to 6.18 ± 0.12 GPa, correlating with densification and grain boundary strengthening. Piezoelectric performance metrics exhibited significant enhancement, with longitudinal coefficient d₃₃ increasing from 105 to 148 pC/N, planar coupling factor kₚ from 0.34 to 0.44, and the figure of merit rising from 2.51 to 3.05 pC·V/m·N², attributed to optimized domain alignment and reduced defects facilitating domain wall motion. The combined improvements in dielectric, mechanical, and electromechanical properties demonstrate that SPS processing at 1050 °C effectively tailors phase composition, microstructure, and functional responses, making these KNN–BT ceramics highly suitable for lead-free piezoelectric applications in sensors, actuators, and energy harvesters demanding high efficiency, thermal stability, and mechanical robustness.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 2","pages":"239 - 248"},"PeriodicalIF":2.7,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermoelectric and mechanical properties of Bi2S3−xSex polycrystals","authors":"Ying Zhou,&nbsp;Xinghua Shi,&nbsp;Zhenhua Ge,&nbsp;Yixin Miao,&nbsp;X.-H. Shi","doi":"10.1007/s10832-025-00421-0","DOIUrl":"10.1007/s10832-025-00421-0","url":null,"abstract":"<div><p>Bi₂S₃ has the advantages of nontoxic and low-cost components, high Seebeck coefficient, and intrinsically low thermal conductivity, making it a promising thermoelectric material. However, its poor electrical conductivity limits its thermoelectric performance across all temperature ranges. To improve the conductivity of Bi₂S₃-based thermoelectric materials, Se, a Group VIA element similar to S, was chosen as an effective doping element to synthesise Bi₂S_3−xSe_x (x = 0, 0.1, 0.3, 0.5) bulk material via melting and spark plasma sintering. The room-temperature electrical conductivity of Bi₂S_2.7Se_0.3 was approximately 24 S·cm⁻¹, which is two orders of magnitude higher than that of pristine Bi₂S₃. At 623 K, Bi₂S_2.5Se_0.5 exhibited an ultralow thermal conductivity of 0.5 µW·m⁻¹·K⁻¹. Thus, Se doping not only enhanced the electrical conductivity of Bi₂S₃ but also increased phonons scattering through Se substitution and interstitial Se, which significantly reduced the lattice thermal conductivity of Bi₂S₃. Consequently, the Bi₂S_2.7Se_0.3 sample achieved an optimal ZT value of approximately 0.16 at 573 K, which is four times higher than that of the pristine Bi₂S₃ sample.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 2","pages":"217 - 223"},"PeriodicalIF":2.7,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10832-025-00421-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Electronic structure, interfacial characteristics and sodium ion dynamics in GaN/SnS2@GDY heterostructures: a first-principles study","authors":"Suzhen He,&nbsp;Yuda Lin","doi":"10.1007/s10832-025-00446-5","DOIUrl":"10.1007/s10832-025-00446-5","url":null,"abstract":"<div><p>In this study, we successfully constructed GaN/SnS₂@graphdiyne (GaN/SnS₂@GDY) heterostructures and used first-principles calculations to deeply investigate their electronic structure features and sodium ion storage kinetics. The thermodynamic structural stability was verified through ab initio molecular dynamics (AIMD) simulation calculations. Besides, calculations reveal that the Young’s modulus of the GaN/SnS₂@GDY heterostructure is 331 N/m, with a Poisson’s ratio of 0.38, significantly higher than that of the individual materials, which can effectively resist volume changes during charging and discharging cycles. Moreover, the coupling effects and charge transfer mechanisms at different interfaces were analyzed through the calculation system of differential charge density and work function. The DOS calculations results show that the GaN/SnS₂@GDY heterostructure exhibits a zero band-gap feature, resulting in excellent electrical conductivity. The migration energy of Na⁺ at the SnS₂/GDY interface is significantly reduced to 0.57 eV. In addition, the differential charge density results reveals that the electron transfer of Na⁺ at the GaN/SnS₂ and SnS₂/GDY heterointerfaces are 0.76 e and 0.91 e, respectively. Meanwhile, the binding energy calculations reveals that the binding energies of Na⁺ at the GaN/SnS₂ and SnS₂/GDY heterointerfaces are − 0.37 eV and − 3.17 eV, respectively. These results provide important information for studying the storage mechanisms of Na⁺ at different interfaces.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 2","pages":"249 - 260"},"PeriodicalIF":2.7,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies of structure, microstructure, dielectric, and electrical properties of Mg2FeVO6 ceramic for device application","authors":"Jayakrushna Sahu,&nbsp;B. N. Parida,&nbsp;N. C. Nayak,&nbsp;Rajib Padhee,&nbsp;S. K. Parida","doi":"10.1007/s10832-025-00439-4","DOIUrl":"10.1007/s10832-025-00439-4","url":null,"abstract":"<div><p>In this communication, structural, microstructural, dielectric, and electrical properties of the Mg₂FeVO₆ ceramics are reported. The preliminary structural analysis confirmed the formation of a solid solution of the major phase of cubic symmetry (#Ia-3d), which is matched up to 43.92%. The average crystallite size is calculated using both the Scherer and Williamson-Hall method, and the obtained values are 38.9 nm and 54.2 nm, respectively. The micro-lattice strain and dislocation density are found to be 0.000206 and 3.4 × 10¹⁴ m^− 2. Microstructural examination using scanning electron microscopy (SEM) revealed well-grown compact grains of size 191.5 <i>n</i>m, with an observed improvement in grain connectivity and densification. The sample purity is confirmed in terms of 100% presence of all constituent elements in weight and atomic form from EDX analysis. The analysis of the FTIR spectrum confirms the presence of all constituent atomic stretching vibrations. The study of dielectric measurements reveals Maxwell-Wagner’s type of polarization effect and shows a higher value of dielectric constant of 72,000 and lower energy dissipation. Impedance plots analysis demonstrated a decrease in grain boundary resistance and an overall enhancement in electrical conductivity attributed to NTCR character. The analysis of modulus plots reveals the presence of a non-Debye type of relaxation, while the ac conductivity study suggests the presence of a thermally activated conduction mechanism. The study of resistance versus temperature reveals the NTC thermistor character of the Mg₂FeVO₆ ceramics, offering a pathway to design advanced temperature sensors.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 2","pages":"224 - 238"},"PeriodicalIF":2.7,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 A-site cationic off-stoichiometry on structure-property relationship in the lead-free morphotropic phase boundary system 0.93(Na₀.₅Bi₀.₅TiO₃)-0.07BaTiO₃ (NBT-7BT)","authors":"Bikram Saren,&nbsp;Nishi Kumari Singh,&nbsp;Srishty Chandrakant Mangutte,&nbsp;Debadarshini Samantaray,&nbsp;Ranabrata Mazumder,&nbsp;Anupam Mishra","doi":"10.1007/s10832-025-00447-4","DOIUrl":"10.1007/s10832-025-00447-4","url":null,"abstract":"<div><p>A comprehensive investigation was carried out to elucidate the influence of A-site cationic off-stoichiometry on the microstructural, structural, dielectric, and electromechanical properties of the lead-free morphotropic phase boundary (MPB) composition 0.93(Na₀.₅Bi₀.₅TiO₃)-0.07BaTiO₃ (NBT-7BT). A series of compositions with controlled sodium and bismuth deviations from stoichiometry were synthesized via the solid-state ceramic synthesis route. The study reveals that A-site off-stoichiometry has a pronounced effect on grain growth and morphology, with Na-rich compositions exhibiting significant grain coarsening. Notably, a 2% Na-excess sample demonstrated a ~ 50% enhancement in the longitudinal piezoelectric coefficient (<i>d₃₃</i>), indicating improved electromechanical performance. Structural analyses of poled samples revealed a higher persistence of the cubic phase in Na-rich compositions, suggesting increased polar-structural heterogeneity. Dielectric spectroscopy showed enhanced dispersion behaviour with increasing off-stoichiometry. These findings highlight the critical role of A-site chemical tuning in modulating phase structure and functional response, providing a viable strategy for the design of high-performance, environmentally benign piezoceramics.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 2","pages":"261 - 278"},"PeriodicalIF":2.7,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective properties of piezoelectric 1–3 composites: finite element analysis and experimental verification","authors":"Hu Yan,&nbsp;Zhu Junyue,&nbsp;Hao Longlong,&nbsp;Hou Chuanwei,&nbsp;Wang Nan,&nbsp;Xu Dongyu","doi":"10.1007/s10832-025-00428-7","DOIUrl":"10.1007/s10832-025-00428-7","url":null,"abstract":"<div><p>Piezoelectric 1–3 composites have been widely used in fields of medical ultrasound, non-destructive evaluation, and hydroacoustic etc. due to their excellent acoustic and electromechanical capabilities. Here, effective properties of epoxy-based piezoelectric 1–3 composites with a varied piezoelectric ceramic volume fraction and thickness were discussed based on finite element analysis (FEA) accompanied by experimental verification. The research results show that the relative permittivities at constant stress of piezoelectric 1–3 composites increase with increasing piezoelectric ceramic volume fraction, and are basically independent on thickness of the composite. The piezoelectric strain coefficients <i>d</i>₃₃ of piezoelectric 1–3 composites show an increasing trend with increasing piezoelectric ceramic volume fraction; however, the piezoelectric voltage coefficients <i>g</i>₃₃ show an opposite variation. There exists a linear relationship between thickness resonance frequency and reciprocal of thickness, and the frequency constant of the composite is 1152.46 when piezoelectric ceramic volume fraction is 67.82%. The thickness electromechanical coupling factors <i>k</i>_t of piezoelectric 1–3 composites are far larger than that of the piezoelectric ceramic, and their acoustic impedance and mechanical quality factor are obviously lower than those of the piezoelectric ceramic. Therefore, the epoxy-based piezoelectric 1–3 composite with desired electromechanical coupling properties can be tailored by changing piezoelectric ceramic volume fraction and thickness.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"205 - 216"},"PeriodicalIF":2.7,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 supercapacitor performance: The Influence of doping in spinel ferrite materials","authors":"Hamzeh Ghorbani,&nbsp;Mahin Eshraghi,&nbsp;Amir Abbas Sabouri Dodaran,&nbsp;Parviz Kameli,&nbsp;Mazeyar Parvinzadeh Gashti,&nbsp;Serif Uran,&nbsp;Ram K. Gupta","doi":"10.1007/s10832-025-00433-w","DOIUrl":"10.1007/s10832-025-00433-w","url":null,"abstract":"<div>\u0000 \u0000 <p>Strategic doping of ferrite materials in supercapacitors can improve their performance due to their unique electrochemical stability and versatile properties. This paper reviews the effects of doping on the performance of ferrite-based supercapacitors with emphasis on the ways in which certain elements such as transition metals, rare earth metals among others can increase specific capacitance, energy density and cyclic stability in ferrite electrodes. Through the addition of alloying materials in the structure of ferrites, their crystal structure, electronic conductivity, and surface properties are changed which leads to improved electrochemical performance. Apart from alloying techniques, the method of synthesis of ferrite-based materials plays a significant role in determining their overall performance. Environmentally friendly synthesizing methods employed in the production of ferrite nanomaterials have attracted much attention due to their reduced environmental impact and economical benefits. Such means offer a green alternative to the production of ferrites in comparison with the conventional methods, sometimes even maintaining or improving their electrochemical performance. The integration of hybrid energy storage systems, which combine high energy storage capacity of batteries with the fast power delivery of supercapacitors is also discussed. There is current research on the use of ferrite-based materials together with carbon nanomaterials to provide versatile solutions for various energy storage applications. Finally, this review emphasizes the need for further research in optimizing alloying strategies for ferrites, improving scalability, and understanding the environmental and economic aspects of their synthesis. Integrating ferrite-based supercapacitors into next-generation energy storage systems could provide a sustainable and widely used alternative for a wide range of global energy needs.</p>\u0000 </div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"168 - 204"},"PeriodicalIF":2.7,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of sintering temperature on the dielectric and impedance properties of rare-earth manganese ErMnO3","authors":"Wei Li,&nbsp;Xiaoyu Wu,&nbsp;Ziheng Huang,&nbsp;Weitian Wang","doi":"10.1007/s10832-025-00438-5","DOIUrl":"10.1007/s10832-025-00438-5","url":null,"abstract":"<div><p>Polycrystalline ErMnO₃ ceramics were synthesized through a solid-state reaction method and systematically characterized to investigate the influence of sintering temperature (ranging from 1300 to 1450 ℃) on their structural, microstructural, and electrical properties. X-ray diffraction analysis confirmed the formation of a single hexagonal perovskite phase (space group P6₃cm) at temperatures above 1350 ℃. Scanning electron microscopy observations indicated improved densification and progressive grain growth with increasing sintering temperature; however, abnormal grain overgrowth was observed at 1450 ℃. X-ray photoelectron spectroscopy revealed that Er³⁺ is the predominant oxidation state, while higher sintering temperatures facilitated the generation of oxygen vacancies, leading to the partial reduction of Mn³⁺ to Mn²⁺. Dielectric measurements showed that the sample sintered at 1400 ℃ exhibited the highest permittivity (<i>ε</i>′ = 1.532 × 10⁵ at 1 kHz and 300 K) and the lowest dielectric loss (tanδ = 2.270 at 1 kHz and 300 K), indicating optimal polarization behavior. Impedance spectroscopy further demonstrated that this sample had the lowest equivalent resistance, suggesting enhanced charge carrier mobility. Reduced electric modulus values in the mid- to high-frequency range supported the conclusion that structural defects were effectively suppressed. These findings highlight the critical role of sintering temperature in determining the electrical performance of ErMnO₃ ceramics, with 1400 ℃ yielding the most favorable combination of structural stability, defect minimization, and improved dielectric response, thereby enhancing its potential for application in multifunctional electronic devices.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"155 - 167"},"PeriodicalIF":2.7,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dielectric, piezoelectric, and ferroelectric properties of Sm3+/Nd3+/Mn2+-doped and Sm3+/Mn2+-, and Nd3+/Mn2+-codoped 0.24PIN-0.46PMN-0.30PT ternary ceramics","authors":"Yahya Azizi,&nbsp;Mohsen Yazdanmehr,&nbsp;Hossein Ahmadvand,&nbsp;Mohammad Reza Kazerani Vahdani,&nbsp;Hassan Ahmadvand","doi":"10.1007/s10832-025-00437-6","DOIUrl":"10.1007/s10832-025-00437-6","url":null,"abstract":"<div><p>To investigate the role of donor-acceptor co-doping in relaxor-PT piezoelectric compounds, we studied Sm³⁺/Nd³⁺/Mn²⁺-doped and co-doped 0.24Pb(In_1/2Nb_1/2)O₃-0.46Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃ (0.24PIN-0.46PMN-0.3PT) ternary ceramics. Among the doped samples, the Sm-doped ceramic exhibited the highest room-temperature properties, including dielectric constant (<span>(:{{upepsilon:}}_{text{r}})</span>= 4211), piezoelectric charge coefficient (d₃₃ = 800 pC/N), and electromechanical coupling coefficients (<span>(:{text{k}}_{33})</span>= 0.63 and <span>(:{text{k}}_{text{p}})</span>=0.56). In contrast, the Mn-doped compound demonstrated the highest Curie temperature (<span>(:{text{T}}_{text{c}})</span>= 187 °C) and coercive field (<span>(:{text{E}}_{text{c}})</span>= 13.4 kV/cm), attributed to defect dipole formation. Intermediate co-doping with Sm/Mn or Nd/Mn resulted in higher <span>(:{text{E}}_{text{c}})</span> but lower d₃₃ compared to undoped, Sm-, or Nd-doped counterparts. This indicates that Mn co-doping enhances <span>(:{text{E}}_{text{c}})</span> at the expense of d₃₃, introducing an internal bias field (<span>(:{text{E}}_{text{i}})</span>) that promotes hard piezoelectric behavior in these ceramics. </p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"142 - 154"},"PeriodicalIF":2.7,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement of electrical properties for CaBi4Ti4O15 piezoelectric ceramics by rare earth La3+ modification","authors":"Wanqi Tang,&nbsp;Tongxiang Liang,&nbsp;Ying Liu,&nbsp;Dongfang Pang","doi":"10.1007/s10832-025-00435-8","DOIUrl":"10.1007/s10832-025-00435-8","url":null,"abstract":"<div><p>High-temperature lead-free piezoelectric ceramics Ca(La_<i>x</i>Bi_1−<i>x</i>)₄Ti₄O₁₅(CBT-<i>x</i>La, <i>x</i> = 0 to 0.12) by La³⁺ ions modified were prepared using a conventional solid-phase reaction method. Based on different La³⁺ doping content, the phase structures, dielectric, ferroelectric and piezoelectric properties of CBT-<i>x</i>La ceramics are investigated systematically. The addition of trace La³⁺ dopant does not cause significant change in the crystal lattice structure of CBT ceramics, but the ferroelectric-paraelectric phase transition temperature (<i>Tc</i>) decrease from 790 °C to 600 °C with the increase of La³⁺ content. This is because the 6s² lone electrons of Bi³⁺ ions have a weakened effect with the decrease of Bi³⁺ content, the substitution of La³⁺ reduces the structural distortion of original crystal structure. Besides, the grain size decreases significantly with the increase of La³⁺ content, from 0.57 μm to 0.39 μm. In addition, the oxygen vacancies were reduced by La³⁺ doping, which lead to improvement of the electrical properties for CBT ceramics effectively. Especially, CBT-0.01La is the optimal component with the best ferroelectric and piezoelectric properties with good thermal stability, a remnant polarization of <i>P</i>_<i>r</i> = 29.7 µC/cm² and a piezoelectric constant of <i>d</i>_<i>33</i> = 13 pC/N were achieved. This work provides a promising candidate for high-temperature piezoelectric materials.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"130 - 141"},"PeriodicalIF":2.7,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}