Journal of Materiomics最新文献

{"title":"Exploring the mechanisms of enhanced piezoelectric properties in (K,Na)NbO3 single crystals","authors":"Da Huo ,&nbsp;Biao Wang ,&nbsp;Jinhui Fan ,&nbsp;Kai Li ,&nbsp;Yang Liu ,&nbsp;Xudong Qi ,&nbsp;Limei Zheng","doi":"10.1016/j.jmat.2024.100943","DOIUrl":"10.1016/j.jmat.2024.100943","url":null,"abstract":"<div><div>(K,Na)NbO₃ (KNN)-based piezoelectric materials are candidates for replacing Pb-based materials. However, the piezoelectric properties of existing KNN-based single crystals are still inferior to those of Pb-based relaxor ferroelectric single crystals. Moreover, the piezoelectric response mechanism of KNN-based single crystals remains unclear. In this study, (Li,K,Na)(Nb,Sb,Ta)O₃:Mn (KNNLST:Mn) single crystals with an excellent piezoelectric coefficient <em>d</em>₃₃ of approximately 778 pC/N were prepared. Systematically studies of intrinsic and extrinsic piezoelectric responses have revealed that the high <em>d</em>₃₃ of KNNLST:Mn single crystals is related to the shear piezoelectric response of a single-domain state and irreversible domain wall motion of the engineering domains. Furthermore, the effect of the orthorhombic (O)-tetragonal (T) phase boundary on intrinsic and extrinsic piezoelectric response is systematically studied, and the impact mechanism is elucidated. The results indicate that a lower dielectric response and elastic constant limit the intrinsic shear piezoelectric response of KNNLST:Mn single crystals, and approaching the O–T phase boundary can enhance both intrinsic and extrinsic piezoelectric responses. This study improves our understanding of the structure-performance relationship in KNN-based single crystals and offers insights for optimizing piezoelectric properties in KNN-based materials.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100943"},"PeriodicalIF":8.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Genetic algorithm-enabled mechanical metamaterials for vibration isolation with different payloads","authors":"Xinyu Song ,&nbsp;Sen Yan ,&nbsp;Yong Wang ,&nbsp;Haojie Zhang ,&nbsp;Jiacheng Xue ,&nbsp;Tengfei Liu ,&nbsp;Xiaoyong Tian ,&nbsp;Lingling Wu ,&nbsp;Hanqing Jiang ,&nbsp;Dichen Li","doi":"10.1016/j.jmat.2024.100944","DOIUrl":"10.1016/j.jmat.2024.100944","url":null,"abstract":"<div><div>Mechanical vibration isolation with adaptable payloads has always been one of the most challenging topics in mechanical engineering. In this study, we address this problem by introducing machine learning method to search for quasi-zero stiffness metamaterials with arbitrarily predetermined payloads and by employing multi-material 3D printing technology to fabricate them as an integrated part. Dynamic tests demonstrate that both the single- and multi-payload metamaterials can effectively isolate mechanical vibration in low frequency domain. Importantly, the payload of the metamaterial could be arbitrarily designed according to the application scenario and could function at multiple payloads. This design strategy opens new avenues for mechanical energy shielding under various scenarios and under variable loading conditions.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100944"},"PeriodicalIF":8.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142439311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Advancing piezoelectricity and excellent thermal stability: <001>-textured 0.75BF–0.25BT lead-free ceramics for high temperature applications","authors":"Zhangpan Shen ,&nbsp;Jian Guo ,&nbsp;Xiaoyi Gao ,&nbsp;Weidong Xuan ,&nbsp;Jiye Zhang ,&nbsp;Dawei Wang ,&nbsp;Jinrong Cheng ,&nbsp;Shujun Zhang ,&nbsp;Jianguo Chen","doi":"10.1016/j.jmat.2024.100946","DOIUrl":"10.1016/j.jmat.2024.100946","url":null,"abstract":"<div><div>There is an urgent need for piezoelectric materials possessing both high piezoelectric properties and good thermal stability to facilitate the advancement of high temperature piezoelectric devices. However, conventional strategy for enhancing piezoelectricity via chemical modifications often comes at the cost of thermal stability due to a drop in Curie temperatures. In this study, we achieved remarkable results in &lt;001&gt;-oriented 0.75BiFeO₃–0.25BaTiO₃ (0.75BF–0.25BT) lead-free textured ceramics. These textured ceramics exhibit a high Curie temperatures <em>T</em>_C of 552 °C, large piezoelectric coefficients <em>d</em>₃₃ of 265 pC/N, and exceptional piezoelectric thermal stability, with minimal variation of 8% across temperature from 25 °C to 300 °C. Compared to randomly oriented ceramics, the piezoelectric coefficient is about 2.5 times higher, marking it as one of the highest reported value for ceramics with <em>T</em>_c near 550 °C. The enhanced piezoelectric properties can be ascribed to improvements in both intrinsic lattice distortions and extrinsic non-180° domain motions, while the excellent piezoelectric thermal stability is attributed to the stable domain texture. These superior properties of the studied textured 0.75BF–0.25BT ceramics position them as competitive lead-free candidates for high-temperature piezoelectric applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100946"},"PeriodicalIF":8.4,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Ultrathin WOx interfacial layer improving the ferroelectricity and endurance of Hf0.5Zr0.5O2 thin films on polyimide","authors":"Chunxu Zhao ,&nbsp;Huiping Wang ,&nbsp;Xinyu Gu,&nbsp;Wei Zhang,&nbsp;Yubao Li","doi":"10.1016/j.jmat.2024.100942","DOIUrl":"10.1016/j.jmat.2024.100942","url":null,"abstract":"<div><div>Here we report substantial effects of inserting PVD-prepared highly-conductive ultrathin WO_<em>x</em> as interfacial layer in TiN/Hf_0.5Zr_0.5O₂(HZO)/TiN structure on the ferroelectricity of HZO thin films. The prepared TiN/WO_<em>x</em>/HZO/WO_<em>x</em>/TiN capacitor, exhibiting a remnant polarization (<em>P</em>_r) of 18.8 μC/cm² at 2 MV/cm and outstanding endurance of over 3.2 × 10⁹ cycles under 10⁵ Hz bipolar square field cycling. Furthermore, a scalable transfer technique, in which CVD-grown few-layered graphene thin film is used as a sacrificial layer, is developed for transferring HZO-based ferroelectric stack pre-fabricated on SiO₂/Si substrate onto a flexible polyimide (PI) membrane, with marginal loss in the ferroelectric properties of HZO. Importantly, mechanical bending testing demonstrates excellent flexibility of TiN/WO_<em>x</em>/HZO/WO_<em>x</em>/TiN stack, with robust polarization and superb endurance properties being well-maintained even after 10⁴ cycles at a small bending radius of 2 mm. Both implementing ultrathin WO_<em>x</em> as interfacial layers and utilizing two-dimensional materials assisted transfer technique would be of great value in the development of HfO₂-based flexible ferroelectric memory.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100942"},"PeriodicalIF":8.4,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Synergistic functional additives on cycling performance of silicon-carbon composite anode in pouch cells","authors":"Jun Cheng ,&nbsp;Zhenyu Huang ,&nbsp;Anqi Lu ,&nbsp;Aiqi He ,&nbsp;Yuxuan Shao ,&nbsp;Yuxin Fan ,&nbsp;Yunhui Huang","doi":"10.1016/j.jmat.2024.100941","DOIUrl":"10.1016/j.jmat.2024.100941","url":null,"abstract":"<div><div>With increasing application demands of electronics and electric vehicles, the energy density of lithium-ion batteries (LIBs) is expected to be higher and higher. The silicon-based anode materials have triggered global research interest due to low operating voltage and high specific capacity. However, for the Si-based anode, the large volume change during cycling causes cracking and pulverization of Si particles, leading to the sluggish kinetics and poor cycle life. In this work, fluoroethylene carbonate (FEC) and lithium bis(fluorosulfonyl)imide (LiFSI) are used as synergistic functional additives to enhance the performance of silicon–carbon (Si<img>C) composite anode in pouch cell. The properties of solid electrolyte interphase (SEI) formed on the surface of Si<img>C composite anode have been systematically investigated. The images of different electrolytes infiltration and gas production after formation are analyzed with ultrasonic transmission scanning technique. DFT calculations are used to illustrate the mechanism. All date collection is at pouch cell level, which is more persuasive.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100941"},"PeriodicalIF":8.4,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142360660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Influence of electrode contact arrangements on Polarisation-Electric field measurements of ferroelectric ceramics: A case study of BaTiO3","authors":"Erin L. Carroll ,&nbsp;James H. Killeen ,&nbsp;Antonio Feteira ,&nbsp;Julian S. Dean ,&nbsp;Derek C. Sinclair","doi":"10.1016/j.jmat.2024.100939","DOIUrl":"10.1016/j.jmat.2024.100939","url":null,"abstract":"<div><div>A range of partial top full bottom electrodes are used to explore the use of bi-polar Polarisation-Electric field (<em>P</em>–<em>E</em>) measurements to quantify recoverable energy (<em>W</em>_rec), energy loss (<em>W</em>_loss) and the efficiency (<em>η</em>) of ferroelectric BaTiO₃ ceramics. The values obtained are dependent on the ratio of sample thickness (<em>S</em>) and top contact radius (<em>r</em>). With increasing <em>S</em>/<em>r</em> from 0.17 to 1.96 the <em>P</em>–<em>E</em> responses become increasingly distorted and broader. Measurements show <em>W</em>_rec increases by a factor of ∼1.4 but <em>W</em>_loss increases by a factor of ∼7 with <em>η</em> decreasing from ∼29% to 8%. Finite element modelling was used to simulate the experimental set-up of the sample/electrode arrangements using the Jiles-Atherton model to replicate the ferroelectric behaviour of BaTiO₃. These models demonstrate the experimentally applied electric field using a simple geometric correction for sample thickness is an underestimation of the actual field experienced by the material under the top contact at high <em>S</em>/<em>r</em> values. We stress the importance of reporting the contact sizes and thicknesses of samples when using <em>P</em>–<em>E</em> measurements to assess <em>W</em>_rec, <em>W</em>_loss and <em>η</em> in non-linear dielectric materials. This will allow a fairer comparison of performances between various types of materials being considered for high-energy-density ceramic capacitors.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 3","pages":"Article 100939"},"PeriodicalIF":8.4,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic","authors":"Naichao Chen ,&nbsp;Jin Cheng ,&nbsp;Xinwei Xu ,&nbsp;Hongye Wang ,&nbsp;Xiaoyu Li ,&nbsp;Zhan Zeng ,&nbsp;Bingfeng Zhao ,&nbsp;Mingzhao Xu ,&nbsp;Hong Wang","doi":"10.1016/j.jmat.2024.100940","DOIUrl":"10.1016/j.jmat.2024.100940","url":null,"abstract":"<div><div>Dielectric ceramics are essential components in communication systems that operate within the microwave frequency range. In high-density packages, dielectric substrates ceramics must possess high thermal conductivity to efficiently dissipate heat. However, achieving adequate thermal conductivity (<em>κ</em>) in ceramics sintered at low temperatures is challenging. In this study, we employed the cold sintering process (CSP) to fabricate Li₂MoO₄-<em>x</em>%Al₂O₃ (0≤<em>x</em> ≤ 80, in volume) ceramics under 200 MPa pressure at 150 °C. The Li₂MoO₄<img>40%Al₂O₃ composite exhibited significantly enhanced <em>κ</em> of 5.4 W·m⁻¹·K⁻¹, an 80% increase compared to pure Li₂MoO₄ ceramic with <em>κ</em> of 3 W·m⁻¹·K⁻¹. At 40% Al₂O₃ content, the Li₂MoO₄<img>Al₂O₃ ceramic demonstrated notable microwave properties (<em>ε</em> ∼ 6.67, <em>Q×f</em> ∼ 17,846 GHz, <em>τ</em>_f ∼ −105 × 10⁻⁶ °C^-1). Additionally, simulation of a microstrip patch antenna for 5 GHz applications using Li₂MoO₄<img>20%Al₂O₃ ceramic as dielectric substrate <em>via</em> Finite Element Simulation software showed excellent performance, with radiation efficiency exceeding 99% and low return loss (<em>S</em>₁₁ &lt; −30 dB) at both 4.9 GHz and 28.0 GHz center frequencies. These findings underscore the suitability of Li₂MoO₄<img>Al₂O₃ ceramics for microwave dielectric substrate.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100940"},"PeriodicalIF":8.4,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"High-piezoelectric lead-free BiFeO3BaTiO3 ceramics with enhanced temperature stability and mechanical properties","authors":"Xiaoxiao Zhou ,&nbsp;Yuxin Xu ,&nbsp;Xiaoqi Gao ,&nbsp;Chengchao Hu ,&nbsp;Wan Jiang ,&nbsp;Hezhang Li ,&nbsp;Bo-Ping Zhang","doi":"10.1016/j.jmat.2024.100937","DOIUrl":"10.1016/j.jmat.2024.100937","url":null,"abstract":"<div><div>BiFeO₃<img>BaTiO₃ (BF–BT) ceramics exhibit higher piezoelectric coefficients (<em>d</em>₃₃), Curie temperatures (<em>T</em>_C), and temperature stability than other high-temperature lead-free piezoelectric materials. However, despite their crucial role in piezoelectric devices, the mechanical properties of BF–BT ceramics have been underexplored. A thorough evaluation of the mechanical properties of BF–BT is crucial for developing cost-effective and durable lead-free piezoelectric ceramics. Moreover, the specific causes of the high piezoelectric response and excellent temperature stability of BF–BT ceramics remain unclear owing to the instrumental detection threshold, which limits experimental studies to temperatures above 140 °C and below the degradation temperature of <em>d</em>₃₃. To investigate the intrinsic origins of the high piezoelectricity and temperature stability of BF–<em>x</em>BT ceramics and to enhance their mechanical properties, a two-step sintering process is used to fabricate these ceramics (0.25 ≤ <em>x</em> ≤ 0.40). Owing to improvements in grain refinement and reduced Bi³⁺ volatilization, the BF–0.33 BT ceramic exhibits enhanced overall performance, with a modified small punch strength of 155 MPa, Vickers hardness of 5.2 GPa, a <em>d</em>₃₃ of 220 pC/N at room temperature, <em>T</em>_C of 466 °C, and <em>d</em>₃₃ values exceeding 400 pC/N at 260 °C. Phase-field simulations, which address the limitations of device detection thresholds, reveal that with increasing temperature, the domain structure relaxes, and polarization intensity decreases. This indicates that changes in the high-temperature piezoelectric properties can be attributed to domain structure relaxation and the increase in dielectric constant. Overall, BF–BT ceramics exhibit superior piezoelectric performance, mechanical properties, and temperature stability, making them highly suitable for use in high-temperature and demanding environments.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100937"},"PeriodicalIF":8.4,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Alloy scattering to optimize carrier and phonon transport properties in PbBi2S4 thermoelectric","authors":"Wei Liu ,&nbsp;Tao Hong ,&nbsp;Xinxiu Cheng ,&nbsp;Liqing Xu ,&nbsp;Guilong Yan ,&nbsp;Wenke He ,&nbsp;Yu Xiao","doi":"10.1016/j.jmat.2024.100938","DOIUrl":"10.1016/j.jmat.2024.100938","url":null,"abstract":"<div><div>Ternary PbBi₂S₄ compound with crustal S-rich element and low lattice thermal conductivity is considered as a potential thermoelectric candidate. However, its inferior thermoelectric properties are rooted in the low electrical transport performance. Generally, enhancing electrical transport performance (power factor, PF) primarily entails optimizing the interdependent relationship between carrier mobility <em>μ</em> (linked to electrical conductivity <em>σ</em>) and effective mass <em>m</em>∗ (related to Seebeck coefficient <em>S</em>). In this work, we introduce the strategy of alloy scattering to independently enhance <em>S</em> without weakening <em>μ</em> and simultaneously reduce thermal conductivity, leading to a synergetic optimization of electron and phonon in PbBi₂S₄ thermoelectric. Heavy Sn alloying in PbBi₂S₄ presents uniform and orderly distribution on Pb sites as unclosed by the atomic-scale crystal structure observation. These massive Sn atom serves as scattering centers and turns the electron scattering mechanism to be dominated by alloy scattering, thus resulting in a ∼33% increment of <em>S</em> in Pb_0.6Sn_0.4Bi₂S₄. Meanwhile, Sn alloying aggravates phonon scattering further lowering lattice thermal conductivity and reaching an extremely low value of 0.34 W⋅m⁻¹·K⁻¹ at 773 K. Finally, a maximum <em>zT</em> of 0.68 at 773 K is obtained in Pb_0.6Sn_0.4Bi₂S₄, which is ∼ 45% higher than the pristine matrix. This study proves that the strategy of alloy scattering is effective in improving overall electrical transport properties as well as reducing lattice thermal conductivity, which paves a new way to develop high-performance thermoelectric materials.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100938"},"PeriodicalIF":8.4,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143174785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"In-situ surface modification of nickel mesh for superior electromagnetic interference shielding","authors":"Zhihang Fu ,&nbsp;Yufeng Wu ,&nbsp;Yunzhi Li ,&nbsp;Kai Huang ,&nbsp;Qingsong Li ,&nbsp;Huiming Yao ,&nbsp;Wanting Cao ,&nbsp;Song Gao ,&nbsp;Yang Qin ,&nbsp;Zhichuan Zheng ,&nbsp;Jianchun Xu ,&nbsp;Ming Lei ,&nbsp;Ke Bi ,&nbsp;Hui Wu","doi":"10.1016/j.jmat.2024.100936","DOIUrl":"10.1016/j.jmat.2024.100936","url":null,"abstract":"<div><div>Metal mesh, with its inherent conductivity, transparency, and flexibility, has proven to be an exceptional choice for high-performance reflection-dominated electromagnetic interference (EMI) shielding materials, due to its multifunctionality and wide applicability. However, the development of metal-based absorption-enhanced EMI shielding materials characterized by high absorption and low reflection is crucial but remains challenging. Herein, we introduce a novel surface modification strategy for nickel mesh (NM) aimed at augmenting its surface electromagnetic wave absorption through electrochemical surface microstructure alteration and subsequent wet chemical sulphuration. This approach leverages the multiple reflections within the microporous structure and the impedance matching enhancement provided by the magnetic sulfided nickel layer, resulting in the sulfur-treated porous NM (Ni₃S₂-PNM) achieving an outstanding average EMI SE of 59.6 dB across a broad frequency range of 4–40 GHz. The surface electromagnetic wave absorption rate of Ni₃S₂-PNM has increased from under 1% for unmodified NM to over 60%, significantly reducing the re-reflection of electromagnetic waves back into free space (the average SE_R value decreases from about 20 dB to 2.2 dB). Characterized by its simplicity and cost-effectiveness, this <em>in-situ</em> surface modification method on bulk industrial-grade NM, enhancing electromagnetic shielding, presents a promising avenue for wider application in electromagnetic protection.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 4","pages":"Article 100936"},"PeriodicalIF":8.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143173484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}