Journal of Materials Research最新文献_第4页

Dielectric and electromagnetic shielding behavior of CaCu3Ti4O12/CoFe2O4/silicone rubber composites CaCu3Ti4O12/CoFe2O4 硅橡胶复合材料的介电和电磁屏蔽行为

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-16 DOI: 10.1557/s43578-024-01416-3

Neelam Kumari, Shivali Meena, Amena Salim, Rahul Singhal, Vishant Gahlaut, Jigar Limbachiya, Bhuwaneshwar Semwal, Ravi Hegde, Umesh Kumar Dwivedi

{"title":"Dielectric and electromagnetic shielding behavior of CaCu3Ti4O12/CoFe2O4/silicone rubber composites","authors":"Neelam Kumari, Shivali Meena, Amena Salim, Rahul Singhal, Vishant Gahlaut, Jigar Limbachiya, Bhuwaneshwar Semwal, Ravi Hegde, Umesh Kumar Dwivedi","doi":"10.1557/s43578-024-01416-3","DOIUrl":"https://doi.org/10.1557/s43578-024-01416-3","url":null,"abstract":"With mushrooming of wireless wearable devices, demand of efficient electromagnetic interference (EMI) shielding material gained much interest to obstruct the unwanted radiations. This paper reports the fabrication of CaCu3Ti4O12(CCTO)/CoFe2O4(CFO)/silicone composites and investigation of their dielectric and EMI shielding characteristics. The EMI shielding effectiveness and dielectric properties of prepared composites are evaluated for different compositions of CaCu3Ti4O12 (50, 35, 25, 15 wt%) and CoFe2O4 (0, 15, 25, 35 wt%) in silicone matrix. The dielectric constant found maximum (~ 50) for CCS-3 composite. The CaCu3Ti4O12/CoFe2O4/silicone composites (0 and 35% CoFe2O4) exhibited total shielding effectiveness (SET ~ 6 dB) corresponds to 75% shielding efficiency in X-band. By introducing magnetic filler with CaCu3Ti4O12 in silicone matrix, better EMI attenuation is remarkably achieved. The shielding mechanism displays synergistic contribution of magnetic particles, colossal dielectric particles, and insulating elastomeric matrix. This work provides an avenue for developing better electromagnetic radiation shielding material for wearable electronics, and dielectric resonators.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216704","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}

引用次数: 0

Lithium-substituted magnesium ferrite-polyaniline nanocomposites for X-band electromagnetic interference shielding 用于 X 波段电磁干扰屏蔽的锂取代镁铁氧体-聚苯胺纳米复合材料

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-16 DOI: 10.1557/s43578-024-01415-4

Sumit Kumar, Neelam Singh, Suraj Kumar

{"title":"Lithium-substituted magnesium ferrite-polyaniline nanocomposites for X-band electromagnetic interference shielding","authors":"Sumit Kumar, Neelam Singh, Suraj Kumar","doi":"10.1557/s43578-024-01415-4","DOIUrl":"https://doi.org/10.1557/s43578-024-01415-4","url":null,"abstract":"The progress of the automated industry produces undesired electromagnetic interference (EMI) that distresses the end-users and functionality of electronic devices. This article develops new composite based on a polyaniline matrix and lithium-substituted magnesium ferrite (Mg0.8Li0.2Fe2O4) nanofiller. The composite was designed to contain both electric and magnetic sources by including polarizable groups in the PANI structure and by loading this matrix with magnetic nanoparticles, respectively. Magnetic analyses indicated a saturation magnetization and coercivity of 32.5 emu gm−1 and 32 Oe, respectively, for the ferrite nanoparticles which reduces to magnetization of 13.5 emu gm−1 with the composite formation. These novel composites are investigated from the point of view of their EMI shielding properties, showing the high shielding effectiveness of 73 dB in X-band frequency region. The composite’s remarkable shielding qualities make it a very promising material for a variety of applications, including radar absorption and stealth technology.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216701","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}

引用次数: 0

Defects and doping in ultra-wide band gap (Al,Ga)N and β-(Al,Ga)2O3 alloys 超宽带隙 (Al,Ga)N 和 β-(Al,Ga)2O3 合金中的缺陷与掺杂

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-12 DOI: 10.1557/s43578-024-01407-4

Filip Tuomisto

引用次数: 0

Histopathological pulp response to nano zirconia versus nano clay modified glass ionomers: An experimental study 纳米氧化锆与纳米粘土改性玻璃离聚体的牙髓组织病理学反应：实验研究

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-09 DOI: 10.1557/s43578-024-01403-8

M. Temirek, Amel M. Ezzat, Yasmine Alaa El-din

引用次数: 0

Visible light-active copper-based antimicrobial photo catalyst with rapid killing rate of Escherichia coli and Staphylococcus aureus 具有快速杀灭大肠杆菌和金黄色葡萄球菌能力的可见光活性铜基抗菌光催化剂

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-08 DOI: 10.1557/s43578-024-01406-5

Nurul Khusna Mohd Salleh, F. Aziz, N. Yusof, J. Jaafar, W. Salleh, A. F. Ismail

引用次数: 0

TXRF capability of metallic contamination analysis on rough silicon wafers 对粗糙硅晶片进行金属污染分析的 TXRF 能力

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-02 DOI: 10.1557/s43578-024-01401-w

Viviane Yim, Anna Mukhtarov, Nathalie Drogue, Delphine Autillo, Thierry Lardin, Marc Zussy, Jérôme Dechamp, Delphine Truffier-Boutry

{"title":"TXRF capability of metallic contamination analysis on rough silicon wafers","authors":"Viviane Yim, Anna Mukhtarov, Nathalie Drogue, Delphine Autillo, Thierry Lardin, Marc Zussy, Jérôme Dechamp, Delphine Truffier-Boutry","doi":"10.1557/s43578-024-01401-w","DOIUrl":"https://doi.org/10.1557/s43578-024-01401-w","url":null,"abstract":"Total X-Ray Fluorescence (TXRF) is a non-destructive technique for the characterization of metallic contaminants on bare silicon wafers. TXRF is sensible to roughness leading to a diffraction phenomenon. In this study, the effects of roughness on TXRF analysis were evaluated with various rough silicon wafers produced by microelectronic processes of grinding, wet cleaning and chemical mechanical polishing. TXRF parameters rise as roughness increases, starting from 3 nm RMS (Root Mean Square) roughness. On spectra, characteristic Si (silicon wafer) and W (TXRF anode) peaks widen. Secondary peaks, sum/escape peaks appear, inducing interferences with Al, Cu, Zn and background noise increases as well. Through intentionally contaminated grinded wafers (RMS 12 nm) by spin-coating at selected concentrations, it was observed that most of the elements are quantified at 1 × 1012 at/cm2. At concentrations of 1 × 1010 at/cm2 and 1 × 1011 at/cm2, only few elements are quantified due to the elevated background noise and interferences.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881246","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}

引用次数: 0

Investigation of structural, electrical, dynamical, optical, and thermoelectric properties of Sr-doped Mg2Si systems using first-principles calculations 利用第一原理计算研究掺锶 Mg2Si 系统的结构、电气、动力学、光学和热电特性

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-01 DOI: 10.1557/s43578-024-01402-9

Dita Deme Degefa, Nebiyu Bogale Mereke, Mesfin Zewdu Biweta, Zeinu Ahmed Rabba, Mulualem Abebe Mekonnen

{"title":"Investigation of structural, electrical, dynamical, optical, and thermoelectric properties of Sr-doped Mg2Si systems using first-principles calculations","authors":"Dita Deme Degefa, Nebiyu Bogale Mereke, Mesfin Zewdu Biweta, Zeinu Ahmed Rabba, Mulualem Abebe Mekonnen","doi":"10.1557/s43578-024-01402-9","DOIUrl":"https://doi.org/10.1557/s43578-024-01402-9","url":null,"abstract":"This research article explores the comprehensive characterization of Mg8Si4 and Sr2Mg6Si8 systems, delving into their structural, electrical, dynamical, optical, and thermoelectric properties. Employing GGA and HSE06 hybrid functional calculations alongside semiclassical Boltzmann technique calculations, the study reveals intriguing insights. Through examination of cohesive and formation energies, it is established that Sr2Mg6Si8 exhibits the most stable condition. Phonon dispersion confirms the structural stability of both compounds. Mg8Si4 possesses an indirect band gap of 0.222 eV, whereas Sr2Mg6Si8 showcases a direct band gap of 0.752 eV under HSE06 analysis. Notably, Sr2Mg6Si8 displays superior electrical conductivity and Seebeck coefficient despite low lattice thermal conductivity, resulting in a promising thermoelectric figure of merit (ZT) of 0.64 at 700 K. Moreover, the composition Sr2Mg6Si4 exhibits a notable Power Factor of 4 × 1012 WK−2 m−1 s−1 at 700 K, highlighting its potential for thermoelectric applications.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870623","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}

引用次数: 0

Effect of LaB6 on the microstructure and wear resistance of In718/LaB6 composite coatings by laser cladding LaB6 对激光熔覆 In718/LaB6 复合涂层微观结构和耐磨性的影响

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-08-01 DOI: 10.1557/s43578-024-01392-8

Chenhui Cui, Meiping Wu, Hang Wang, Dadong Jie, Xin jin, Xiaojin Miao

引用次数: 0

Hydrophobicity and high-temperature mechanical behaviour of hard and optically transparent nanocomposite Al–Si–N thin films 坚硬和光学透明纳米复合 Al-Si-N 薄膜的疏水性和高温机械性能

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-07-31 DOI: 10.1557/s43578-024-01405-6

Soni, S. K. Sharma, S. K. Mishra

引用次数: 0

Nylon 12 composite powder prepared by thermally induced phase separation for selective laser sintering 通过热诱导相分离制备用于选择性激光烧结的尼龙 12 复合粉末

IF 2.7 4区材料科学

Journal of Materials Research Pub Date : 2024-07-31 DOI: 10.1557/s43578-024-01398-2

Rong Deng, Lulu Ren, Dandan Su, Jingkui Yang, Jinbo Jin, Ting Lei, Kaizhou Zhang, Shuhao Qin

{"title":"Nylon 12 composite powder prepared by thermally induced phase separation for selective laser sintering","authors":"Rong Deng, Lulu Ren, Dandan Su, Jingkui Yang, Jinbo Jin, Ting Lei, Kaizhou Zhang, Shuhao Qin","doi":"10.1557/s43578-024-01398-2","DOIUrl":"https://doi.org/10.1557/s43578-024-01398-2","url":null,"abstract":"A thermally induced phase separation method was successfully developed to prepare spherical composite nylon 12 (PA12)/Nano-silica (Nano-SiO2) powder. By comparing the performance of pure PA12 and composite PA12 powders, it was found that the introduction of Nano-SiO2 can improve the sphericity of the composite PA12 powder, with a median particle size of 54–70 μm. Moreover, the presence of Nano-SiO2 can induce the formation of more α-phase during the crystallization of PA12, and most of Nano-SiO2 was coated by PA12 molecular chains during the solidification crystallization process, which improved the crystallization temperature and crystallinity of the composite PA12 powder. When the amount of Nano-SiO2 was 0.3 wt%, the composite PA12 powder had the highest crystallinity, and the powder spreading performance was the best.<h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>Mechanism diagram of the reaction between PA12 and Nano-SiO2. In this figure, it was found that Nano-SiO2 was treated with silane coupling agent can form siloxane, so that amino groups were grafted to the surface of Nano-SiO2. The amino groups can react with carboxyl groups in PA12 to form amide bonds, thereby improving the interfacial adhesion between nano silica and PA12 matrix and enhancing their compatibility. Meanwhile, by comparing the microstructure before and after addition, it was found that the addition of Nano-SiO2 increased the sphericity of the powder, and the powder particle size increased from 55.2 to 68.71 μm.\u0000","PeriodicalId":16306,"journal":{"name":"Journal of Materials Research","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870620","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}

引用次数: 0