Russian Physics Journal最新文献_第8页

Structural and Electromagnetic Properties of Lithium Ferrite Manufactured by Extrusion Printing 通过挤压印刷制造的锂铁氧体的结构和电磁特性

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-03 DOI: 10.1007/s11182-024-03203-3

E. N. Lysenko, E. V. Nikolaev, V. A. Vlasov, A. S. Svirkov, A. P. Surzhikov, E. A. Sheveleva, I. V. Plotnikova, S. A. Artishchev

{"title":"Structural and Electromagnetic Properties of Lithium Ferrite Manufactured by Extrusion Printing","authors":"E. N. Lysenko, E. V. Nikolaev, V. A. Vlasov, A. S. Svirkov, A. P. Surzhikov, E. A. Sheveleva, I. V. Plotnikova, S. A. Artishchev","doi":"10.1007/s11182-024-03203-3","DOIUrl":"10.1007/s11182-024-03203-3","url":null,"abstract":"The structure and electromagnetic properties of a lithium ferrite, Li0.5Fe2.5O4, fabricated by an additive manufacturing process based on extrusion printing of ferrite samples with a binder substance followed by hightemperature sintering are studied. A preliminary ferrite-powder synthesis is carried out by the solid-phase method using iron oxide and lithium carbonate. The ferrite paste for printing is prepared using a binder based on ethyl cellulose and terpineol. The samples measuring 100 and 500 μm are fabricated by extrusion in a Voltera V-one 3D printer. The samples are sintered in a laboratory furnace at 1100°C. The microstructure and properties of the resulting ferrites depend on the printed layer thickness. The samples are characterized by a relative density of 72 and 76%, a specific saturation magnetization of 50 and 62 emu/g, a Curie temperature of 625 and 630°C, and a specific electric resistivity of 1.1·1010 and 1.6·109 Ω·cm for the 100 and 500 μm-thick samples, respectively.","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 7","pages":"960 - 965"},"PeriodicalIF":0.4,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UVC Irradiation Effect on Gold Nanoparticles Prepared by Pulsed Laser Ablation and their Biological Activity 紫外线辐照对脉冲激光烧蚀制备的金纳米粒子的影响及其生物活性

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-03 DOI: 10.1007/s11182-024-03211-3

Faiz Ahmad Mohammed, Khalaf Ajaj, Mushtaq Abed Al-Jubbori

{"title":"UVC Irradiation Effect on Gold Nanoparticles Prepared by Pulsed Laser Ablation and their Biological Activity","authors":"Faiz Ahmad Mohammed, Khalaf Ajaj, Mushtaq Abed Al-Jubbori","doi":"10.1007/s11182-024-03211-3","DOIUrl":"10.1007/s11182-024-03211-3","url":null,"abstract":"Pulsed laser ablation in liquid technique was used to produce nanostructure materials from a gold metal plate immersed in double distilled water at different energies (200 and 400 mJ) and different numbers of pulses (100, 200, 300, 400 and 500) using a Q-switched Nd:YAG laser. Moreover, the prepared gold nanoparticles (AuNPs) were tested and characterized using different examined techniques. The optical, morphological and structural properties of AuNPs were characterized by an UV-visible spectrometer, transmission electron microscope (TEM), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction. It was found that by increasing in the number of laser pulses before irradiation, the UV-visible spectroscopy revealed a decrease in the surface plasmon resonance (SPR) peak position and an increase in the optical band gap of AuNPs. TEM and FE-SEM images showed spherical-like shapes with average diameters ranging from 34 to 44 nm. AuNP face centered cubic crystallinity was evident from XRD. Moreover, antibacterial tests with AuNPs on Staphylococcus aureus and Escherichia coli showed a mid-level inhibition. In addition, the AuNP absorbance intensity and SPR peak at 522–525 nm increased after the UVC irradiation, while the optical band gap of the samples slightly decreased. The AuNP UVC-irradiation exhibited a significant inhibitory effect against Gram(+ve) and Gram(–ve) bacteria.","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 7","pages":"1015 - 1032"},"PeriodicalIF":0.4,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic Growth Mechanism of Crystal Faces of Surface Martensite with Habit Planes in Proximity to {112} 具有接近 {112} 习惯面的表面马氏体晶面的动态生长机制

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-03 DOI: 10.1007/s11182-024-03201-5

N. M. Kashchenko

引用次数: 0

Study of the Behavior of Ultrashort Radio-Wave Refraction in the Ten-Meter Layer of the Atmosphere Above the Underlying Surface Around Big Eravna Lakes 大埃拉夫纳湖周围地表下十米大气层中超短无线电波折射行为研究

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-03 DOI: 10.1007/s11182-024-03212-2

A. V. Bazarov, A. S. Bazarova, R. S. Sychev, S. A. Kurakov, E. B. Atutov, E. Yu. Korovin, Yu. B. Bashkuev

引用次数: 0

Influence of the Thickness of Titanium Foils on the Deformation Pattern in ZrO2-Based Metalceramic Composites 钛箔厚度对 ZrO2 基金属陶瓷复合材料变形模式的影响

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-03 DOI: 10.1007/s11182-024-03200-6

Yu. F. Gomorova, A. E. Kuznetsova, S. P. Buyakova, V. V. Shmakov, A. G. Burlachenko, S. M. Karpov, Yu. V. Dontsov

引用次数: 0

Thin Film Nanocomposite Enhancing Electromagnetic Radiation of a Flexible Radiator 增强柔性散热器电磁辐射的薄膜纳米复合材料

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-02 DOI: 10.1007/s11182-024-03204-2

N. R. Lakshmi, T. K. Sreeja

{"title":"Thin Film Nanocomposite Enhancing Electromagnetic Radiation of a Flexible Radiator","authors":"N. R. Lakshmi, T. K. Sreeja","doi":"10.1007/s11182-024-03204-2","DOIUrl":"10.1007/s11182-024-03204-2","url":null,"abstract":"It is shown that a thin film nanocomposite (NC) coating the radiator enhances the electromagnetic radiation in a particular band. The parameter enhancement in a rigid radiator is done with a metal strip, which is not suitable for a flexible substrate radiator. The NC, i.e. carbon nanotubes-iron-nickel-cobalt (CNT-FeNiCo) nanocomposite, proposed in the radiator design has good electric, magnetic and mechanical characteristics suitable for a flexible radiator. The NC film coated on a shorter radiating strip improves the upper band radiation of a dual-band radiator. The bandwidth of the upper band in the NC-coated radiator is enhanced by 102.50% with a good improvement in the gain and radiation efficiency. The concentration and distribution of CNTs in the antenna substrate coating changes the dielectric constant of the substrate, which can be tailored for specific antenna requirements. Unique properties of the CNT-FeNiCo NC synthesized for radiator fabrication are considered. A uniform NC coating is applied in accordance with the thickness and concentration to enhance the electrical conductivity and mechanical properties. The proposed radiator produces a 2.30–4.10 GHz (1.80 GHz) bandwidth in the lower band and 4.75–6.35 GHz (1.60 GHz) in the upper band, which covers the ISM, WLAN, WiMAX, WiFi and 5G bands.","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 7","pages":"966 - 972"},"PeriodicalIF":0.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Response of Al Based Zr-Doped Stacked Tri-Layer HfO2 Deposited at Various Substrate Temperature 不同基底温度下沉积的铝基掺锆堆叠三层 HfO2 的电响应

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-02 DOI: 10.1007/s11182-024-03198-x

R. Sultana, K. Islam, S. Chakraborty

{"title":"Electrical Response of Al Based Zr-Doped Stacked Tri-Layer HfO2 Deposited at Various Substrate Temperature","authors":"R. Sultana, K. Islam, S. Chakraborty","doi":"10.1007/s11182-024-03198-x","DOIUrl":"10.1007/s11182-024-03198-x","url":null,"abstract":"This study examines how the substrate temperature affects the electrical characteristics of the Zr-doped HfO2/Al/Zr-doped HfO2 (HZO/Al/HZO) tri-layer stack. Tri-layer stack is deposited by a simultaneous use of RF magnetron sputtering for HfO2 and DC magnetron sputtering for Zr and Al targets. During deposition, the substrate temperature is varied from 25 to 300°C. The observed hysteresis loop is prominent for the stack deposited at room temperature, while it becomes minute at higher temperatures. Interface trap density and oxide charge density of the tri-layer stack are minimum at 300°C and maximum at room temperatures. Frequency dispersion is detected in the stack deposited at room temperature, but it disappears in stacks deposited at 300°C. In addition, compared to other tri-layer stacks, the stack deposited at 300°C shows good conductivity. Therefore, compared to other samples, the tri-layer stack deposited at 300°C has improved electrical characteristics. It is shown that the substrate temperature has a significant impact on the electrical properties of the stack.","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 7","pages":"923 - 931"},"PeriodicalIF":0.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic Modeling of the C90–N2 System C90-N2 系统的热力学建模

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-02 DOI: 10.1007/s11182-024-03205-1

N. M. Barbin, L. V. Yakupova, D. I. Terent’ev, V. T. Kuanyshev, A. I. Burumbaev, D. I. Burumbaev

引用次数: 0

Structure and Properties of Surfacing Made of High-Entropy High-Speed Steel 高熵高速钢堆焊面的结构与性能

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-02 DOI: 10.1007/s11182-024-03196-z

A. B. Yuriev, Yu. F. Ivanov, V. E. Gromov, A. I. Potekaev, Yu. A. Abzaev, A. A. Klopotov, S. S. Minenko, A. S. Chapaikin, A. P. Semin

引用次数: 0

Spectroscopic Analysis and TL Glow Curve Studies of Eu3+-Doped Er2SiO5 Phosphor 掺杂 Eu3+ 的 Er2SiO5 磷光体的光谱分析和 TL 辉光曲线研究

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2024-07-02 DOI: 10.1007/s11182-024-03206-0

Ram Krishna Deshmukh, N. Kumar Swamy, Vikas Dubey, A. V. Chandrasekhar, G. Naveen Kumar, M. C. Rao

{"title":"Spectroscopic Analysis and TL Glow Curve Studies of Eu3+-Doped Er2SiO5 Phosphor","authors":"Ram Krishna Deshmukh, N. Kumar Swamy, Vikas Dubey, A. V. Chandrasekhar, G. Naveen Kumar, M. C. Rao","doi":"10.1007/s11182-024-03206-0","DOIUrl":"10.1007/s11182-024-03206-0","url":null,"abstract":"Synthesis and characterization of Eu3+-doped Er2SiO5 phosphor are reported. The samples are prepared using the modified conventional solid-state synthesis technique with variable concentrations of doping ions and their structural studies are carried out by X–ray diffraction (XRD). The information on the morphology of the samples prepared with optimized doping ion concentrations is obtained by scanning electron microscopy (SEM). A photoluminescence (PL) analysis of the phosphor samples is also done for the fixed doping ion concentrations. The identified PL emission bands are attributed to the intra 4f transitions of a Eu3+ ion, such as 5D0→7F1 at 590 nm, 5D0→7F0 at 602 and 5D0→7F2 at 613 nm. The corresponding transitions of the doping ions and the concentration quenching effect are studied in detail. The 1931 Commission Internationale de l’éclairage (CIE) (x, y) chromaticity coordinates show the spectral distribution calculated from the PL emission spectrum. A thermoluminescence (TL) glow curve analysis is performed for variable doping ion concentrations, and the corresponding trap parameters are calculated using the Computerized Glow Curve Deconvolution (CGCD) technique. Our study shows that as-prepared phosphor may be useful for display devices.","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 7","pages":"978 - 984"},"PeriodicalIF":0.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0