Long Chen, Michael A. Maigbay, Miao Li, Xiaoqing Qiu
{"title":"Synthesis and modification strategies of g-C3N4 nanosheets for photocatalytic applications","authors":"Long Chen, Michael A. Maigbay, Miao Li, Xiaoqing Qiu","doi":"10.1016/j.apmate.2023.100150","DOIUrl":"10.1016/j.apmate.2023.100150","url":null,"abstract":"<div><p>Graphitic carbon nitride nanosheets (CNNs) become the most promising member in the carbon nitride family benefitted from their two-dimensional structural features. Recently, great endeavors have been made in the synthesis and modification of CNNs to improve their photocatalytic properties, and many exciting progresses have been gained. In order to elucidate the fundamentals of CNNs based catalysts and provide the insights into rational design of photocatalysis system, we describe recent progress made in CNNs preparation strategies and their applications in this review. Firstly, the physicochemical properties of CNNs are briefly introduced. Secondly, the synthesis approaches of CNNs are reviewed, including top-down stripping strategies (thermal, gas, liquid, and composite stripping) and bottom-up precursor molecules design strategies (solvothermal, template, and supramolecular self-assembly method). Subsequently, the modification strategies based on CNNs in recent years are discussed, including crystal structure design, doping, surface functionalization, constructing 2D heterojunction, and anchoring single-atom. Then the multifunctional applications of g-C<sub>3</sub>N<sub>4</sub> nanosheet based materials in photocatalysis including H<sub>2</sub> evolution, O<sub>2</sub> evolution, overall water splitting, H<sub>2</sub>O<sub>2</sub> production, CO<sub>2</sub> reduction, N<sub>2</sub> fixation, pollutant removal, organic synthesis, and sensing are highlighted. Finally, the opportunities and challenges for the development of high-performance CNNs photocatalytic systems are also prospected.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 1","pages":"Article 100150"},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X23000428/pdfft?md5=9f3e916bc55b233577cc81831e23ec14&pid=1-s2.0-S2772834X23000428-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73834735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Wang , Mengqiu Huang , Ke Pei , Wenbin You , Biao Zhao , Limin Wu , Chongyun Liang , Jincang Zhang , Renchao Che
{"title":"Confined magnetic vortex motion from metal-organic frameworks derived Ni@C microspheres boosts electromagnetic wave energy dissipation","authors":"Lei Wang , Mengqiu Huang , Ke Pei , Wenbin You , Biao Zhao , Limin Wu , Chongyun Liang , Jincang Zhang , Renchao Che","doi":"10.1016/j.apmate.2023.100111","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100111","url":null,"abstract":"<div><p>Magnetic domain structure plays an important role in regulating the electromagnetic properties, which dominates the magnetic response behaviors. Herein, unique magnetic vortex domain is firstly obtained in the Ni nanoparticles (NPs) reduced from the Ni-based metal-organic frameworks (MOFs) precursor. Due to both the high symmetry spheres and boundary restriction of graphited carbon shell, confined magnetic vortex structure is generated in the nanoscale Ni core during the annealing process. Meanwhile, MOFs-derived Ni@C assembly powders construct special magnetic flux distribution and electron migration routes. MOFs-derived Ni@C microspheres exhibit outstanding electromagnetic (EM) wave absorption performance. The minimum reflection loss value of Ni@C–V microspheres with vortex domain can reach −54.6 dB at only 2.5 mm thickness, and the efficient absorption bandwidth up to 5.0 GHz at only 2.0 mm. Significantly, configuration evolution of magnetic vortex driven by the orientation and reversion of polarity core boosts EM wave energy dissipation. Magnetic coupling effect among neighboring Ni@C microspheres significantly enhances the magnetic reaction intensity. Graphitized carbon matrix and heterojunction Ni–C interfaces further offer the conduction loss and interfacial polarization. As result, MOFs-derived Ni@C–V powders display unique magnetic vortex, electronic migration network, and high-performance EM wave energy dissipation.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fusheng Tan , Li Li , Jia Li , Bin Liu , Peter K. Liaw , Qihong Fang
{"title":"Multiscale modelling of irradiation damage behavior in high entropy alloys","authors":"Fusheng Tan , Li Li , Jia Li , Bin Liu , Peter K. Liaw , Qihong Fang","doi":"10.1016/j.apmate.2023.100114","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100114","url":null,"abstract":"<div><p>The increasingly harsh environment of the nuclear reactors and the insurmountable flaws of in-service materials have created an urgent need for the development of the brand-new alloys. For last decade, the high-entropy alloys (HEAs), a novel composition-design strategy, have received much attention due to their promise for the nuclear fields. The application of the multiscale modelling is to explore the irradiation performance and underlying mechanisms of HEAs. Abundant results and data deepen the understanding of the irradiation response, and accelerate the development of advanced irradiation-resistant HEAs. This review introduces the state-of-art multiscale modelling used for studying the irradiated properties of HEAs. Representative irradiation-induced microstructures and properties, as well as damage, are summarized. By strengthening the application of multiscale modelling, a rational design of high irradiation-resistant HEAs is expected.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kaina Wang , Jipeng Fu , Shuqin Chang , Xuan Sun , Tianyi Sun , Su Zhang , Ran Pang , Lihong Jiang , Xiaojun Kuang , Evan Wenbo Zhao , Chengyu Li , Shiqing Xu , Mingxue Tang
{"title":"Correlating O-deficiency and luminescence property of Tb3+ doped SrO","authors":"Kaina Wang , Jipeng Fu , Shuqin Chang , Xuan Sun , Tianyi Sun , Su Zhang , Ran Pang , Lihong Jiang , Xiaojun Kuang , Evan Wenbo Zhao , Chengyu Li , Shiqing Xu , Mingxue Tang","doi":"10.1016/j.apmate.2023.100112","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100112","url":null,"abstract":"<div><p>Cubic rock salt can lower down or break the rare earth transition barrier through interstitial or vacancy defects owing to its great deformation and rotation flexibility. Here, we demonstrate that oxygen vacancies in SrO are induced by proper oxidization and atmosphere adjustment, resulting in defects with various depths and crystal field distortion. The thermally assisted tunneling from defects to <sup>5</sup>D<sub>4</sub> state and electronic population decrease on <sup>5</sup>D<sub>3</sub> state of Tb<sup>3+</sup> are observed by the deformation of adjacent oxygen octahedral structure. Finally, the as-prepared SrO: 0.01 Tb<sup>3+</sup> phosphors, commercial BaMgAl<sub>10</sub>O<sub>17</sub>: Eu<sup>2+</sup> blue phosphor, and CaAlSiN<sub>3</sub>: Eu<sup>2+</sup> red phosphor are mixed and coated onto 280 nm deep-ultraviolet LED chip to assemble white light-emitting LED device. The LEDs show CCT of 3850 K, 4136 K, and 4741 K, with color rendering index of 90.3, 90.8, and 92.1, respectively. These insights will advance the fundamental knowledge of crystal engineering in cubic rock salt, and enable new ways to manipulate energy transfer and electronic transition via defects.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100112"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mingzhi Chen , Kun Yang , Zhandong Wang , Shibin Wang , Erke Wu , Zhonghua Ni , Jinzhong Lu , Guifang Sun
{"title":"Underwater laser directed energy deposition of NV E690 steel","authors":"Mingzhi Chen , Kun Yang , Zhandong Wang , Shibin Wang , Erke Wu , Zhonghua Ni , Jinzhong Lu , Guifang Sun","doi":"10.1016/j.apmate.2022.100095","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100095","url":null,"abstract":"<div><p>Powder-based laser direct metal deposition (DMD), one of the directed energy deposition, was applied in air and underwater to repair pre-machined NV E690 steel plates. Systematic investigations on the effects of underwater environment and ambient pressures (0.01–0.35 MPa) on the microstructure evolution, phase transformation, and mechanical properties were conducted. The water quenching effect refined the grain size and increased the dislocation density and lath martensite content. The theoretical models of the underwater pressurized nitriding process and the precipitation kinetics of (Ti, V)N particles were established. Moreover, the microstructure evolution and the mechanical properties of other underwater DMD repaired samples did not show obvious relation with the underwater ambient pressures. This investigation not only provides a candidate for the underwater restoration technique but also bridges marine engineering and emerging DMD technology.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100095"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuan Luo , Tao Song , Feng Wang , Haizhou Lu , Limei Kang , Hongwei Ma , Dongdong Li , Annett Gebert , Chao Yang
{"title":"Phase selection-oriented mechanical properties tailoring for β-type TiNbZrTaSi alloy fabricated by laser powder bed fusion","authors":"Xuan Luo , Tao Song , Feng Wang , Haizhou Lu , Limei Kang , Hongwei Ma , Dongdong Li , Annett Gebert , Chao Yang","doi":"10.1016/j.apmate.2023.100118","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100118","url":null,"abstract":"<div><p>The morphology and distribution of silicides in α/α+β type titanium alloys impress on their properties. Nevertheless, the types of silicide precipitates and their formation mechanisms remain unclear in β-type Ti–Nb–Zr–Ta alloys. In this study, we report the precipitation behavior of silicides formed upon aging treatment of a laser powder bed fusion (LPBF)-fabricated β-type Ti–34.5Nb–6.9Zr–4.9Ta–1.4Si (wt%, TNZTS) alloy. We further discuss their underlying formation mechanism and silicide selection-oriented mechanical properties tailoring for LPBF-fabricated TNZTS alloy. Two novel silicide precipitates were formed: a supersaturated Si–rich β–Ti matrix in the form of a network that can further transform into the (Ti, Zr)<sub>2</sub>Si (S2) phase with the increase of aging temperature; and a short, rod-like S2 precipitate adjacent to pre-existing dot-shaped S2. The former results from the aggregation of Si solute atoms towards to the dislocation walls/microbands and the subsequent precipitation reaction, while the latter arises from the considerable micro-strain around the phase boundary between the dot-shaped S2 and β-Ti owing to the large difference in their thermal expansion coefficients. The aging-treated TNZTS alloy exhibits a good combination of tensile strength (1083 ± 5 MPa) and fracture strain (5.6% ± 1.0%), which is attributed to precipitation strengthening, grain-boundary strengthening, and discontinuous intergranular silicide derived from phase selection. The obtained results provide a basis for the design and fabrication of biomedical Si-containing β-type Ti alloys with excellent mechanical properties.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100118"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huaping Ding , Xiaoqian Bao , Mao Zhang , Junsong Jin , Lei Deng , Kefu Yao , Atefeh Solouk , Pan Gong , Xinyun Wang
{"title":"Novel experimental strategy towards temperature inhomogeneity during spark plasma sintering of metallic glasses","authors":"Huaping Ding , Xiaoqian Bao , Mao Zhang , Junsong Jin , Lei Deng , Kefu Yao , Atefeh Solouk , Pan Gong , Xinyun Wang","doi":"10.1016/j.apmate.2023.100109","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100109","url":null,"abstract":"<div><p>Despite the importance of temperature distribution in spark plasma sintering of metallic glasses, its quantification has been experimentally laborious. This work proposes an experimental strategy to determine the sintering temperature by establishing a quantitative relationship between the temperature-thermal signal. We reproduced the thermal profiles of spark plasma sintering by isothermal annealing and found a correlation between annealing temperature and isothermal crystallization time. This strong correlation indicates the temperature-dependent structural evolution of glassy powders. Using isothermal crystallization time as the measuring gauge, we correlated the annealing temperature to the sintering temperature and obtained the sample temperature map. The sample temperature is at least 19 °C higher than the nominal temperature of 425 °C measured by the thermocouple. Meanwhile, the sample temperature shows a hump-shaped pattern closely correlated with the current density. The maximum temperature of 453 °C occurs on the sample/punches contact surfaces. Temperature heterogeneity within the sample induces diverse microstructures and porous structures. We elucidate that the temperature inhomogeneity is intrinsic, given the presence of contact interfaces. Contact resistances affect the current distribution and heat transfer, resulting in a larger temperature gradient than the traditional powder metallurgy process.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100109"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49734189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hongchao Ma , Fanyue Zhao , Ming Li , Pengyuan Wang , Yinghuan Fu , Guowen Wang , Xinghui Liu
{"title":"Construction of hollow binary oxide heterostructures by Ostwald ripening for superior photoelectrochemical removal of reactive brilliant blue KNR dye","authors":"Hongchao Ma , Fanyue Zhao , Ming Li , Pengyuan Wang , Yinghuan Fu , Guowen Wang , Xinghui Liu","doi":"10.1016/j.apmate.2023.100117","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100117","url":null,"abstract":"<div><p>Although the Ostwald ripening approach is often utilized to manufacture single hollow metal oxide, constructing hollow binary oxide heterostructures as potent photoelectrochemical (PEC) catalysts is still obscure and challenging. Herein, we reveal a general strategy for fabricating hollow binary oxides heterostructures (Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub> and Co<sub>3</sub>O<sub>4</sub>–SnO<sub>2</sub>) utilizing Ostwald ripening. Hollow Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub> nano-network with the structure evolution process was systematically explored through experimental and theoretical tools, identifying the origin of hollow binary oxides due to the interfaces acting as landing sites for their growth. In addition, the structural evolution, from hollow Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub> to Co<sub>3</sub>O<sub>4</sub>-α-MnO<sub>2</sub>, can be observed when the time of secondary hydrothermal reaches 96 h due to the topotactic layer-to-tunnel transition process. Notably, optimized Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub>-48 exhibits a superior PEC degradation efficiency of 96.42% and excellent durability (20,000 min) under harsh acid conditions, attributed to the massive hollow structures' vast surface area for high intently active species. Furthermore, density functional theory simulations elucidated the Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub>’ electron-deficient surface and high d-band center (Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub>, -1.06; Co<sub>3</sub>O<sub>4</sub>-α-MnO<sub>2,</sub> -1.49), strengthening the interaction between the catalyst's surface and active species and prolonging the lifetime of active species of •O<sub>2</sub><sup>−</sup> and <sup>1</sup>O<sub>2</sub>. This work not only demonstrates superior PEC degradation efficiency of hollow Co<sub>3</sub>O<sub>4</sub>-δ-MnO<sub>2</sub> for practical use but also lays the cornerstone for constructing hollow binary oxides heterostructures through Ostwald ripening.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100117"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jianyang Zhang , Zhankun Zhao , Qian Li , Junhua Luan , Chain-Tsuan Liu , Yilu Zhao , Tao Yang
{"title":"Unveiling the unique bifunctionality of L12-structured nanoprecipitates in a FeCoNiAlTi-type high-entropy alloy","authors":"Jianyang Zhang , Zhankun Zhao , Qian Li , Junhua Luan , Chain-Tsuan Liu , Yilu Zhao , Tao Yang","doi":"10.1016/j.apmate.2023.100113","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100113","url":null,"abstract":"<div><p>Nanoprecipitation strengthening has been widely adopted as an effective way to design high-strength alloys, which generally leads to the loss of ductility. Here we unveil the unique bifunctionality of L1<sub>2</sub>-structured nanoprecipitates in a FeCoNiAlTi-type high entropy alloy , enabling the combined increase of tensile strength and ductility. Results show that as-quenched precipitate-free matrix alloys undergo thermally-induced martensite transformation and form the body-centered cubic martensite phase with limited tensile ductility. In strong contrast, when introducing the dense coherent L1<sub>2</sub>-type nanoprecipitates, the face-centered cubic matrix is temporarily stabilized, which in turn promotes the microbands-induced plasticity associated with stress-induced martensite transformation upon deformation. This allows us to achieve significantly improved work hardening capability and excellent plastic deformation stability at a high-strength level. These new findings reshape our understanding of the precipitation strengthening and could provide useful guidance for developing high-performance alloys by regulating the coherent nanoprecipitate and martensitic phase transformation.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100113"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49734192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaogang Luo , Zhongna Yan , Hang Luo , Xuefan Zhou , Boyuan Li , Man Zhang , Dou Zhang
{"title":"Greatly improved piezoelectricity and thermal stability of (Na, Sm) Co-doped CaBi2Nb2O9 ceramics","authors":"Xiaogang Luo , Zhongna Yan , Hang Luo , Xuefan Zhou , Boyuan Li , Man Zhang , Dou Zhang","doi":"10.1016/j.apmate.2023.100116","DOIUrl":"https://doi.org/10.1016/j.apmate.2023.100116","url":null,"abstract":"<div><p>Calcium bismuth niobate (CaBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub>) is regarded as one of the most potential high-temperature piezoelectric materials owing to its highest Curie point in bismuth layer-structured ferroelectrics. Nevertheless, low piezoelectric coefficient and low resistivity at high temperature considerably restrict its development as key electronic components. Herein, markedly improved piezoelectric properties and DC resistivity of CaBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> ceramics through Na<sup>+</sup> and Sm<sup>3+</sup> co-doping are reported. The nominal compositions Ca<sub>1-2<em>x</em></sub>(Na, Sm)<sub><em>x</em></sub>Bi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> (<em>x</em> = 0, 0.01, 0.025, and 0.05) ceramics have been prepared <em>via</em> the conventional solid state method. An optimum composition of Ca<sub>0.95</sub>(Na, Sm)<sub>0.025</sub>Bi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> is obtained, which possesses a high Curie point of ∼949 °C, a piezoelectric coefficient of ∼12.8 pC/N, and a DC electrical resistivity at 500 °C of ∼4 × 10<sup>7</sup> Ω ·cm. The improved <em>d</em><sub><em>33</em></sub> is probably ascribed to the reduction in domain size and the increase in domain wall density caused by the reduced grain size. More importantly, after annealing at 900 °C for 2 h, the piezoelectric coefficient still maintains about 90% of the initial <em>d</em><sub><em>33</em></sub> value, which displays a significant improvement compared to pure CaBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> ceramic with only 44% of the initial <em>d</em><sub><em>33</em></sub> value. This work exhibits a feasible approach to simultaneously obtain high piezoelectric property and thermal stability in CaBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> ceramics by Na<sup>+</sup>/Sm<sup>3+</sup> co-doping.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"2 3","pages":"Article 100116"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}