Advanced Materials Proceedings最新文献_第10页

Sol-gel synthesis of mixed ferrites for biomedical applications 生物医学用混合铁氧体的溶胶-凝胶合成

Advanced Materials Proceedings Pub Date : 2018-06-01 DOI: 10.5185/amp.2018.906

Joel Espino-Portillo

引用次数: 0

Local electronic structure investigation of the sol-gel processed calcium hydroxide material ——溶胶-凝胶法制备氢氧化钙材料的局部电子结构研究

Advanced Materials Proceedings Pub Date : 2018-06-01 DOI: 10.5185/amp.2018/887

J. Singh

引用次数: 3

Zn2+ Substitution by Pb2+ in Alkaline-boro-aluminosilicate Glass-ceramics: Microstructural Aspects Pb2+取代Zn2+在碱硼铝硅酸盐微晶玻璃中的应用:微观结构方面

Advanced Materials Proceedings Pub Date : 2018-04-10 DOI: 10.5185/AMP.2018/042

Mrinmoy Garai, B. Karmakar

{"title":"Zn2+ Substitution by Pb2+ in Alkaline-boro-aluminosilicate Glass-ceramics: Microstructural Aspects","authors":"Mrinmoy Garai, B. Karmakar","doi":"10.5185/AMP.2018/042","DOIUrl":"https://doi.org/10.5185/AMP.2018/042","url":null,"abstract":"This study exemplifies the effects of 5 wt.% Pb 2+ addition replacing the same Zn 2+ content on crystallization and microstructure of 10B 2 O 3 -16Al 2 O 3 -39SiO 2 -12MgO-12MgF 2 -4K 2 O-1Li 2 O-1AlPO 4 (wt.%) glass-ceramic composite. Increase of linear thermal-expansion (6.93 to 7.18×10 -6 /K at 50-600°C) in substituting Zn 2+ by Pb 2+ is attributed to the field-strength of cations. Opaque crystalline glass-ceramics are derived from the transparent glasses (synthesized by single-step melt-quenching at 1500 O C) by controlled heat-treatment at 1050°C and the predominant crystalline-phase was identified as fluorophlogopite mica, KMg 3 AlSi 3 O 10 F 2 . FFESEM of the ZnO containing glass-ceramics revealed that 100-200 µm sized plate-like crystals are in ‘well-packed interlocked arrangement’; which changed to ‘nanocrystalline microstructure’ combined of ‘spherical droplet like’ nanocrystals (crystal size = 10-50 nm) in attendance of PbO. Decrease in linear thermal-expansion (11.03 to 7.93 × 10 -6 /K at 50-700°C) due to the substitution of ZnO is ascribed to the crystallization inhibiting tendency of PbO towards boroaluminosilicate system. Thermal-expansion of ZnO containing glass-ceramic is large (> 11 × 10 -6 /K at 50-700 and 50-800°C) which can exhibit their enough thermal shock resistivity to be suitable for high-temperature sealing application. Copyright © 2017 VBRI Press.","PeriodicalId":7297,"journal":{"name":"Advanced Materials Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74193834","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}

引用次数: 0

Effect of precursor concentration on zinc sulphide nanomaterial prepared by co-precipitation method 前驱体浓度对共沉淀法制备的硫化锌纳米材料的影响

Advanced Materials Proceedings Pub Date : 2017-10-10 DOI: 10.5185/AMP.2017/781

V. Choudapur, Butchi Raju Akondi, A. Bennal

{"title":"Effect of precursor concentration on zinc sulphide nanomaterial prepared by co-precipitation method","authors":"V. Choudapur, Butchi Raju Akondi, A. Bennal","doi":"10.5185/AMP.2017/781","DOIUrl":"https://doi.org/10.5185/AMP.2017/781","url":null,"abstract":"The studies on luminescent II-VI semiconducting nanomaterials have attracted widespread attention, due to their potential applications in optoelectronic and biophotonic devices. Amongst II-VI group semiconductor nanoparticles, ZnS Nano Particles with large exciton binding energy and wide direct bandgap at room temperature have drawn considerable attention for exploring its interesting optoelectronic properties. In this paper, high band gap Zinc Sulphide nanocrystals are prepared by simple Co-precipitation method at different concentrations of precursors, and the role of sulphur concentration on structural and optical properties is studied. The Zinc Sulphide nanomaterial was prepared using low cost precursors and de ionised water as solvent without using any capping agents. As synthesized Zinc Sulphide nanocrystals were characterized by using X-ray diffraction (XRD), Energy Dispersive Spectroscopy analysis, UV-Visible Spectrophotometry, Photoluminescence, Scanning electron Microscopy (SEM) and Ellipsometry. X-ray diffraction studies revealed that as prepared of ZnS nanocrystals are Polycrystalline with Cubic phase with preferential orientation along (111) direction. The crystallite size of the order of 5-11nm were obtained. EDAX pattern confirms the presence of Zinc and Sulfur. From optical absorption measurements, it has been observed that the direct optical band gap energy increases from 4.4 to 5.2eV with decrease in sulphur concentration in ZnS and exhibit large quantum confinement effect. Ellipsometry was carried out to measure optical constants of ZnS thin film. The electrical conductivity of the film is measured for the film coated on ITO glass by two probe methods. Copyright © 2017 VBRI Press.","PeriodicalId":7297,"journal":{"name":"Advanced Materials Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86579979","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}

引用次数: 0

The synthesis of silver, zinc oxide and titanium dioxide nanoparticles and their antimicrobial activity 银、氧化锌和二氧化钛纳米粒子的合成及其抗菌活性

Advanced Materials Proceedings Pub Date : 2017-08-10 DOI: 10.5185/AMP.2017/803

Kate Kotlhao, Moloko D.T. Madiseng, F. Mtunzi, V. Pakade, S. J. Modise, N. Laloo, M. Klink

引用次数: 10

Multiferroic based microwave devices 多铁性微波器件

Advanced Materials Proceedings Pub Date : 2016-08-01 DOI: 10.5185/AMP.2016/112

Vinay Sharma, P. Rani, Bijoy K. Kunar

{"title":"Multiferroic based microwave devices","authors":"Vinay Sharma, P. Rani, Bijoy K. Kunar","doi":"10.5185/AMP.2016/112","DOIUrl":"https://doi.org/10.5185/AMP.2016/112","url":null,"abstract":"Recently, there has been significant interest on the fundamental science and technological applications of complex oxides and multiferroics. Low-power multiferroic have potential to fabricate and characterize frequency tunable, compatible with MMIC Technology, small light-weight for hand-held operation, cost-effective, high-frequency (>10GHz), devices for next generation communication devices and military applications. Multiferroic materials consists of both magnetic and ferroelectric phase and they offer the possibility of magneto-electric (ME) coupling. The purpose of this research is to show strong magnetic field dependent frequency tuning of multiferroics (Nickel doped BFO – BiFe1-xNixO3) based devices over a broad frequency band. We have shown here the magnetic field control of ferromagnetic resonance (FMR) field/frequency from C to Ku band frequencies. Nanoparticles of BiFe1xNixO3 (x=0.025 & 0.05) were prepared by auto combustion method. The XRD study confirms the formation of pure phase Bismuth Ferrite Nanoparticles. Ferromagnetism of un-doped BFO was enhanced by Ni substitution. Microwave characterization was done in co-planar waveguide (CPW) geometry both in field sweep and frequency sweep mode. BiFe1-xNixO3 nanoparticles were deposited using electrophoretic deposition method (EPD) on top of CPW to do the FMR experiments. The operating frequency of the device was tuned by application of magnetic field (H) over a wide range (5 to 20 GHz) with a field up to 8 kOe. Copyright © 2016 VBRI Press","PeriodicalId":7297,"journal":{"name":"Advanced Materials Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82270917","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}

引用次数: 1