Ceramics International最新文献

{"title":"Lightweight composite from graphene-coated hollow glass microspheres for microwave absorption","authors":"Meng Yu ,&nbsp;Yi Hou ,&nbsp;Mingqi Bai ,&nbsp;Donglin Zhao ,&nbsp;Bo Wang ,&nbsp;Yani Zhang","doi":"10.1016/j.ceramint.2024.10.007","DOIUrl":"10.1016/j.ceramint.2024.10.007","url":null,"abstract":"<div><div>In developing the effective and lightweight materials for microwave absorption, graphene holds a bright promise because of its excellent electrical properties and low density, but it suffers from poor impedance matching; while the hollow glass microspheres on the other hand have extremely low density and are dielectric. Their synergistic combination could achieve a perfect impedance matching and thus create a novel lightweight absorption composite. The metamaterial structure absorber can efficiently absorb electromagnetic waves over a wide frequency range. This study employs a hydrothermal method to deposit graphene onto the surfaces of hollow glass microspheres, followed by the design of a metamaterial absorber. Upon coating with graphene flakes, the composite material effectively dissipates electromagnetic wave energy through mechanisms such as interfacial polarization, dielectric loss, and the multiple scattering effects of hollow glass microspheres and graphene flakes. The composite exhibits an effective absorption bandwidth up to 4.02 GHz under a graphene flakes mass fraction of 30 %. More importantly, the incorporation of the metamaterial absorber design further significantly enhances the absorption bandwidth to 7.7 GHz. This material demonstrates significant advantages in terms of lightweight and broadband absorption performance, providing new insights for the research of high-performance lightweight and wideband absorbing materials in the future. However, further investigation is required to examine its long-term stability and performance in complex environments.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50955-50964"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700305","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":"Synthesis, microstructure and physical properties of celsian Ba1−xCaxAl2Si2O8","authors":"Yichen Yu ,&nbsp;Yuanbing Li ,&nbsp;Shujing Li ,&nbsp;Tenglong Guo ,&nbsp;Zhe Qiao ,&nbsp;Changdong Wei","doi":"10.1016/j.ceramint.2024.10.016","DOIUrl":"10.1016/j.ceramint.2024.10.016","url":null,"abstract":"<div><div>Monoclinic barium aluminosilicate (celsian) shows application potential owing to its high-temperature resistance, low thermal conductivity, and excellent oxidative reduction properties. Hexacelsian can easily undergo nucleation because of its favorably symmetric crystal structure, resulting in faster precipitation compared to than in the case of celsian. Celsian can only be formed through the sluggish transformation of hexacelsian at high temperatures. In this study, celsian doped with different contents of CaO was synthesized through a simple one-step solid-state reaction process at lower temperatures and in a shorter time and investigated using differential thermal analysis, phase characterization, microstructural observation, and FactSage thermodynamic calculations. Results showed that the addition of CaO could promote the solid-state reaction, affording products such as barium silicate, hexacelsian, and celsian at lower temperatures. Moreover, CaO could promote the synthesis of celsian in the form of solid solution, affording fully monoclinic celsian Ba_0.7Ca_0.3Al₂Si₂O₈ with only 3 h of holding time at 1400 °C. The optimal addition of CaO showed a decreasing trend with the increase in heat treatment temperature. An optimum CaO level of 0.1 ≤ x ≤ 0.3 was recommended to stabilize celsian. The effects of CaO addition and temperature on the physical, mechanical and thermal conductivity properties of Ba_1-xCa_xAl₂Si₂O₈ were investigated, and Ba_1-xCa_xAl₂Si₂O₈ also exhibited excellent antioxidant reduction properties.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51065-51076"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700454","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":"Synthesis and characterization of ZnO hexagonal sheets wrapped MoS2 sphere for triethylamine gas sensing application","authors":"Weiwei Guo ,&nbsp;Kewei Chen ,&nbsp;Hejing Zhang","doi":"10.1016/j.ceramint.2024.10.002","DOIUrl":"10.1016/j.ceramint.2024.10.002","url":null,"abstract":"<div><div>Triethylamine, a colourless gas with strong irritating odor, has great harm to the human body. We synthesize ZnO/MoS₂ (ZnO hexagonal sheets wrapped MoS₂ sphere structure) for detecting triethylamine. Structural characterizations indicate the largest BET surface area (51.568 m²/g) of ZnO/MoS₂ and the existence of ZnO-MoS₂ n-n heterojunction. The ZnO/MoS₂ exhibit better gas sensing performance than ZnO and MoS₂, that are, high response of 14.5, fast response/recovery times (14 s/28 s), good stability, humidity resistance, and selectivity for 30 ppm triethylamine at 255 °C. Besides, the Uv–vis, PL, UPS, and electrochemistry are conducted to reveal the gas sensing mechanism.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50890-50905"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700516","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":"Regulation of receptor function in NiCo2O4-SnO2 heterojunction for H2S detection at room temperature","authors":"Jianqiao Liu ,&nbsp;Yue Sun ,&nbsp;Shuai Deng ,&nbsp;Kuanguang Zhang ,&nbsp;Yang Ding ,&nbsp;Ce Fu ,&nbsp;Junsheng Wang ,&nbsp;Qianru Zhang","doi":"10.1016/j.ceramint.2024.10.003","DOIUrl":"10.1016/j.ceramint.2024.10.003","url":null,"abstract":"<div><div>In recent years, the World Health Organization has increasingly emphasized air quality in production environments, leading to heightened societal demands for monitoring of pollutant gases at room temperature. Traditional semiconductor gas-sensitive materials, such as tin oxide (SnO₂), have their gas-sensing performance largely limited by their receptor functions, resulting in common issues like low response and poor recovery at room temperature. Spinel-type bimetallic oxides, such as nickel cobaltate (NiCo₂O₄), offer a unique solution due to their rich adsorption sites on the surface, which provide distinctive receptor functions for detecting toxic gases at room temperature. Herein, NiCo₂O₄ is synthesized via a one-step hydrothermal method, with a porous spherical cluster structure, and combined with SnO₂ to form a heterojunction. The NiCo₂O₄-SnO₂ heterojunction film gas sensor exhibits excellent gas-sensing performance for H₂S at room temperature, including high response, short response time, good repeatability, and selectivity. Additionally, the unique receptor functions of the NiCo₂O₄ were analyzed through first-principles calculations, revealing a semiconductor p-n conversion phenomenon in the presence of H₂S gas. The composite also demonstrates a conversion from p-n heterojunction to n-n homojunction during the sensing process, enhancing its gas-sensing performance. This work not only addresses the receptor function limitations of traditional gas-sensitive semiconductor but also provides a feasible approach for controlling carrier types in semiconductors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50906-50920"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700303","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":"Correlated barrier hopping transport and non-Debye type dielectric relaxation in Zn2V2O7 pyrovanadate","authors":"Waqar Hussain Shah ,&nbsp;Yousaf Iqbal ,&nbsp;Muhammad Mushtaq ,&nbsp;Muhammad Javed ,&nbsp;Raheel Mumtaz ,&nbsp;Ghulam Asghar ,&nbsp;Anjam Waheed ,&nbsp;MF Mohd Razip Wee","doi":"10.1016/j.ceramint.2024.10.008","DOIUrl":"10.1016/j.ceramint.2024.10.008","url":null,"abstract":"<div><div>Herein, the Zn₂V₂O₇ electro-ceramic pyrovanadate was synthesized via a conventional solid-state reaction technique and calcined at 700 °C. The single phase formation of Zn₂V₂O₇ pyrovanadate crystallized in the monoclinic structure with <em>C</em>12/<em>c</em>1 space group was confirmed by X-ray diffraction (XRD). The XRD powder diffraction profile was analyzed by Rietveld refinement to investigate the structural details of the compound. The complex impedance analysis was carried out in the frequency domain of <span><math><mrow><mn>83</mn><mo>−</mo><mn>2</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></mrow></math></span> Hz over a temperature range of 453–613 K to study the electrical charge conduction and dielectric relaxation mechanism in the material which revealed the presence of the distribution of relaxation times with thermal charge activation. Depressed semicircles in the Nyquist plots were modeled by an equivalent circuit with configuration (R_GC_G)(R_GBQ_GB) which resolved the contributions of grains and grain boundaries towards the transport properties of the material. The electrical conductivity spectra followed Jonscher's power law behavior and the temperature variation of frequency exponent suggested correlated barrier hopping (CBH) as the governing transport mechanism in the Zn₂V₂O₇ pyrovanadate system. The comparison between scaling behaviors of imaginary parts of impedance and modulus advocated the temperature-independent nature of relaxation time distribution. The imaginary electrical modulus spectra were reproduced by the Kohlrausch, Williams, and Watt formulism, and the fitted parameters confirmed the non-Debye type nature of the dielectric relaxation. Further, the Haveriliak-Negami function was employed to investigate the dielectric response of the material which was found to be consistent with impedance, conductivity, and modulus analyses. The frequency dispersion of the tangent loss verified that the hopping mechanism was thermally activated.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50965-50981"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700447","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":"Gas sensing performance regulating of ZIF-8 encapsulated WO3 nanosheets","authors":"Lingyao Duan ,&nbsp;He Liu ,&nbsp;Kedong Xia ,&nbsp;Zhenzhen Guo ,&nbsp;Yunling Li ,&nbsp;Shaoxin Deng ,&nbsp;Luguo Sun ,&nbsp;Zhenyu Hou","doi":"10.1016/j.ceramint.2024.10.010","DOIUrl":"10.1016/j.ceramint.2024.10.010","url":null,"abstract":"<div><div>Reasonably regulating the adsorption properties on the surface of metal oxide semiconductors (MOS) to enhance sensor selectivity remains a challenge, limiting their application in detecting diseases biomarkers in human exhaled gas. To address this, we proposed a metal-organic frameworks (MOFs) encapsulated strategy to provide a gas-selective permeable nano-filtration layer for MOS gas sensors. By adjusting the coating thickness of ZIF-8, we successfully modulate the sensing properties of WO₃ to different potential biomarkers. The optimized WO₃/ZIF-8 composite shows improved selectivity and response to various disease biomarkers compared to WO₃ alone. The unique porous structure of ZIF-8 and the heterojunction of WO₃/ZIF-8 synergistically promote the gas adsorption performance. QCM test results confirm that ZIF-8 modification effectively regulates gas adsorption on the WO₃ surface. This study provides a valuable reference for designing exhaled gas sensor arrays for detecting serious diseases.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50989-51001"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700449","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":"Crack behaviour and failure mechanisms of air plasma sprayed (Gd, Yb) doped YSZ thermal barrier coatings under oxy-acetylene flame thermal shock","authors":"Zheng Zhao ,&nbsp;Junmiao Shi ,&nbsp;Wenhu Xu ,&nbsp;Xiaolong Chen ,&nbsp;Kehan Yang ,&nbsp;Fuqiang Tian ,&nbsp;Xiancheng Zhang","doi":"10.1016/j.ceramint.2024.09.417","DOIUrl":"10.1016/j.ceramint.2024.09.417","url":null,"abstract":"<div><div>This paper examines the performance and failure mechanisms of atmospheric plasma sprayed (Gd, Yb)-doped YSZ (RYSZ) thermal barrier coatings (TBCs) under oxy-acetylene flame thermal shock conditions. The study involved cyclic thermal shock testing at temperatures of 1400 °C, 1500 °C, and 1600 °C for 10-min intervals until failure occurred, with failure counts recorded as 6, 2, and 2, respectively. During the thermal shock tests, tensile stress in the top coat (TC) caused vertical cracks. The growth of the thermally grown oxide (TGO) layer concentrated stress at the top coat/bond coat interface, leading to transverse interfacial cracks. As the shock temperature increased, the density of vertical cracks and the length of transverse interfacial cracks also increased. Additionally, transverse cracks developed in the TC due to sintering of the surface region at higher shock temperatures. The interaction between vertical and transverse cracks was critical to the spalling of the TC. Variations in crack densities and lengths resulted in different failure modes of the TBCs, depending on the thermal shock temperatures (1400 °C, 1500 °C, and 1600 °C).</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50726-50737"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700520","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":"Co-doped ZnO nanofibers fabricated via electrospinning for rapid and ppb-level detection of listeria biomarker 3-hydroxy-2-butanone","authors":"Yan Li,&nbsp;Gang-Long Song,&nbsp;Xiao-Xue Lian","doi":"10.1016/j.ceramint.2024.09.387","DOIUrl":"10.1016/j.ceramint.2024.09.387","url":null,"abstract":"<div><div>Listeria monocytogenes, a food-borne pathogen capable of releasing biomarker 3-hydroxy-2-butanone (3H-2B), generally causes a serious threat to human health. Developing 3H-2B gas sensor with excellent performance is of great significance in the diagnosis and prevention of Listeria. Here, we have successfully fabricated Co-doped ZnO nanofibers gas sensor via an electrospinning method, which can be well used for real-time monitoring of Listeria. The results show that the Co-doped ZnO nanofibers have a wurtzite crystal structure and a nanofiber-like morphology with a diameter of 62 nm. The band gap (3.15 eV) of the Co-doped ZnO is significantly narrower than that of the pure ZnO (3.25 eV). The response (168) of the 0.5%Co-doped ZnO based sensor to 100 ppm 3H-2B at 305 °C is 5.37 times greater than that of the pure ZnO (31.3), with a high selectivity, a lower detection limit (100 ppb) and a short response time of 1 s. The enhanced gas sensing mechanism is ascribed to the depletion layer on the ZnO surface, a superposition effect of interface barrier, and the narrowed band gap of the ZnO.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50418-50426"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700443","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":"Synthesis, microstructure, mechanical and tribological properties of high-entropy carbides (WZrNbTaTi)C-SiCw","authors":"Jiatai Zhang,&nbsp;Weili Wang,&nbsp;Zhixuan Zhang,&nbsp;Sijie Wei,&nbsp;Qiang Zhang,&nbsp;Zongyao Zhang,&nbsp;Weibin Zhang","doi":"10.1016/j.ceramint.2024.09.423","DOIUrl":"10.1016/j.ceramint.2024.09.423","url":null,"abstract":"<div><div>In this work, composite high-entropy carbides (WZrNbTaTi)C-x SiCw (x = 0, 5 %, 10 %, 15 %, 20 %) are prepared using the two-step fast hot-pressing sintering (TSFHPS) method. The whiskers in the samples are evenly dispersed and well integrated with the ceramic matrix, forming high density materials. The mechanical properties and tribological properties at room temperature are studied, revealing that the addition of SiCw improves the performance of the materials. When the whisker content is 15 %, the hardness and fracture toughness of composite ceramics are the highest, which are 22.6 GPa and 6.8 MPa m^1/2, respectively. The bending strength of the samples increases monotonically with the increase of whisker content, and reaches 639.2 MPa at 20 % content. At the same time, the addition of an appropriate amount of SiCw prevents the propagation of micro-cracks and the expansion of oxidative wear, thereby reducing the friction coefficient and wear rate, and improving the wear resistance of high-entropy carbides.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50780-50792"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700312","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":"Ni-In-oxalate nanostructure as electrode materials for high-performance supercapacitors","authors":"Iftikhar Hussain ,&nbsp;Faiza Bibi ,&nbsp;Abdul Hanan ,&nbsp;Muhammad Ahmad ,&nbsp;P. Rosaiah ,&nbsp;Muhammad Zubair Khan ,&nbsp;Mohammad Altaf ,&nbsp;Bhargav Akkinepally ,&nbsp;Waqas Ul Arifeen ,&nbsp;Zeeshan Ajmal","doi":"10.1016/j.ceramint.2024.10.001","DOIUrl":"10.1016/j.ceramint.2024.10.001","url":null,"abstract":"<div><div>Energy storage technologies play a crucial role in addressing the intermittent characteristics of renewable energy sources, improving the stability of electrical grids, and decreasing the release of greenhouse gas emissions. In this study, we presented nickel indium oxalate (Ni_1-xIn_xC₂O₄) as a promising material with potential applications in the field of electrochemical energy storage. The as-prepared Ni-In- oxalate sample was subjected to different physical characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Regarding the electrochemical energy storage capability, the Ni_1-xIn_xC₂O₄ electrode material exhibited a specific capacitance of 835 F g⁻¹ (417.5 C g⁻¹) at 1 A g⁻¹. The incorporation of nickel (Ni) into the indium (In) oxalate nanoplates enhances their electrochemical performance. The presence of Ni in the nanoplates generated from substrate, improving the overall conductivity of the material and enhances its electrochemical reactions, thus leading to improved energy storage capabilities.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50884-50889"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700334","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}