Materials Science-medziagotyra最新文献_第10页

Blue/NIR-emitting Phosphor Based on Sr2CeO4: Tm3+, Yb3+ Obtained by Combustion Synthesis 燃烧合成Sr2CeO4: Tm3+， Yb3+蓝色/ nir发光荧光粉

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-02-08 DOI: 10.5755/j02.ms.32518

Nelson OSHOGWUE ETAFO, Joshua Omar Carranza, Carlos Eduardo RODRIGUEZ GARCIA, J. Oliva, E. VIESCA-VILLANUEVA, E. Hernández‐Hernández, Alejandro Santibañez, Oscar GOMEZ-ZAVALA

{"title":"Blue/NIR-emitting Phosphor Based on Sr2CeO4: Tm3+, Yb3+ Obtained by Combustion Synthesis","authors":"Nelson OSHOGWUE ETAFO, Joshua Omar Carranza, Carlos Eduardo RODRIGUEZ GARCIA, J. Oliva, E. VIESCA-VILLANUEVA, E. Hernández‐Hernández, Alejandro Santibañez, Oscar GOMEZ-ZAVALA","doi":"10.5755/j02.ms.32518","DOIUrl":"https://doi.org/10.5755/j02.ms.32518","url":null,"abstract":"In this study, pure Sr2CeO4 (SCO) and codoped Sr2CeO4:Tm3+, Yb3+ (SCO:Tm, Yb) of powder phosphors were synthesized by a combustion technique. The concentration of Tm3+ was fixed at 0.5 mol %, while the Yb3+ doping concentration was varied from 0 to 7.0 mol %. The crystalline structure, morphology and luminescence properties were studied using X-ray diffraction (XRD), scanning electron microscope (SEM) and photoluminescence spectroscopy, respectively. The XRD analysis shows the crystalline orthorhombic phase for all synthesized samples of SCO and SCO: Tm, Yb. The SEM results show that the doped sample with 5.0 mol % Yb3+ has the lowest grain particle size of 1.92 mm. The SCO:Tm, Yb phosphors produce mainly blue and near infrared emission bands centered at 481 nm and 813 nm (under 980 nm, excitation) which corresponds respectively to 1G4→3H6 and 3H4→3H6 transitions of Tm3+. In addition, the international commission on illumination CIE coordinates were calculated for all samples taking the range of 400 – 700 nm obtaining for the 5.0 mol % Tm3+ doped sample the coordinates: (x,y) = (0.0833, 0.1671) which match with pure blue color. Due to the strong blue and near infrared emissions, the SCO:Tm, Yb phosphors could be good candidates for use in biomarkers or lighting applications.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48309731","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

Ferromagnetic Interaction in Nickel Oxide Nanoparticles of Vacuum Arc Synthesis 真空电弧合成纳米氧化镍中的铁磁相互作用

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-02-01 DOI: 10.31044/1684-579x-2023-0-2-3-11

I. Karpov, A. Ushakov, L. Fedorov, E. Goncharova, M. Brungardt

{"title":"Ferromagnetic Interaction in Nickel Oxide Nanoparticles of Vacuum Arc Synthesis","authors":"I. Karpov, A. Ushakov, L. Fedorov, E. Goncharova, M. Brungardt","doi":"10.31044/1684-579x-2023-0-2-3-11","DOIUrl":"https://doi.org/10.31044/1684-579x-2023-0-2-3-11","url":null,"abstract":"В работе исследованы нанопорошки оксида никеля, синтезированные в плазме дугового разряда, при давлении газовой смеси в камере 70 Па с использованием аргона в качестве плазмообразующего газа. Наночастицы осаждали на подложку при температурах 300, 400, 500 и 600 K в течение 30 мин. Результаты рентгеноструктурного анализа подтверждают поликристаллический характер полученных наночастиц NiO при различных температурах осаждения. Размер наночастиц находится в диапазоне 3,2—32,7 нм. По результатам исследований намагниченности образцов с охлаждением в нулевом поле и с охлаждением в поле выявлена магнитная структура наночастиц NiO по типу ядро / оболочка. Высказаны предположения относительно магнитного состояния ядра и оболочки частиц.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46749431","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

Behaviour of Innovative Concrete Sandwich Panels with Pervious Concrete Core under Flexural Bending 具有透水混凝土芯板的新型混凝土夹芯板在弯曲弯曲下的性能

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-26 DOI: 10.5755/j02.ms.32859

J. ARUNRAJ CHRISTADOSS, Chinnaraj Pazhani

{"title":"Behaviour of Innovative Concrete Sandwich Panels with Pervious Concrete Core under Flexural Bending","authors":"J. ARUNRAJ CHRISTADOSS, Chinnaraj Pazhani","doi":"10.5755/j02.ms.32859","DOIUrl":"https://doi.org/10.5755/j02.ms.32859","url":null,"abstract":"Research studies investigating the possibility of using new core material (other than polystyrene) in concrete sandwich panels are being reported in the literature. In this paper, lightweight pervious concrete core is proposed as a new alternative. In this paper, the flexural behaviour of concrete sandwich panels with pervious concrete core is investigated under three-point and four-point bending conditions. The geometrical variables considered are core thickness and number of shear connector lines. Test results showed that, sandwich panels without shear connector trusses failed due to separation of wythes, and the panels with shear connector trusses achieved composite action. The variables considered were found to influence the initial stiffness, cracking moment, ultimate moment, load-deflection behaviour and load-strain behaviour of the panels. Analytical study indicated that the equation given in ACI 318 underestimated the strength of the tested panels. The equation have to be modified by explicitly including the shear connector details in the equation for predicting the flexural strength with reasonable accuracy. Further experimental and analytical studies on prototype concrete sandwich panels with pervious concrete core produced using lightweight aggregates are required in view of developing design guidelines for practical applications.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46589364","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

New Ways of Materials Engineering Implementation in the Selection Processes of Biomaterials Intended for the Production of Dental Implants – Narrative Literature Review 在牙种植体生产生物材料选择过程中材料工程实施的新途径-叙述性文献综述

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-26 DOI: 10.5755/j02.ms.32685

J. Duplák, D. Dupláková, D. Mital, Zuzana Mitaľová

{"title":"New Ways of Materials Engineering Implementation in the Selection Processes of Biomaterials Intended for the Production of Dental Implants – Narrative Literature Review","authors":"J. Duplák, D. Dupláková, D. Mital, Zuzana Mitaľová","doi":"10.5755/j02.ms.32685","DOIUrl":"https://doi.org/10.5755/j02.ms.32685","url":null,"abstract":"The usage of knowledge obtained by connecting various scientific areas provides new opportunities for developing multidisciplinary branches to improve processes, procedures, technologies, and products. The present paper is devoted to the description of new approaches to material engineering and its possibilities in the process of the selection of materials intended for the production of dental implants. To ensure the conciseness of the article, a selection of state-of-the-art of scientific contributions is created in the introductory part in the form of a summary table, based on which the following parts of the article are elaborated. The first view of new ways of materials engineering is provided through the elaboration of the categorization of the setting of biological materials used in the production of dental implants, while taking into account current trends, technologies and findings. The second view of new ways of materials engineering is an extended complex process of selection and implementation of biomaterials intended for the production of dental implants originally created and adopted by the American Dental Association. Future studies should investigate the comprehensive analysis of technologies for the production of dental implant materials and also analysis of ways of digitization in the production of dental implants.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45276161","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

Preparation and Properties Magnetite/Polyimide Composites 磁铁矿/聚酰亚胺复合材料的制备与性能研究

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-26 DOI: 10.5755/j02.ms.32188

Xue Fang, Xian-Lu Cui, G. Su, Mingyue Chen, Meihui Song, Xiaochen Zhang, Yang Wang, B. Huang

{"title":"Preparation and Properties Magnetite/Polyimide Composites","authors":"Xue Fang, Xian-Lu Cui, G. Su, Mingyue Chen, Meihui Song, Xiaochen Zhang, Yang Wang, B. Huang","doi":"10.5755/j02.ms.32188","DOIUrl":"https://doi.org/10.5755/j02.ms.32188","url":null,"abstract":"To make the polyimide (PI) composite material having both heat resistance and magnetic permeability, Fe3O4/PI magnetic polyimide composite powder was synthesized by one-step solvothermal method. 4,4'-diaminodiphenyl ether (ODA) as monomers, ether anhydride polyamic acid (PAA) was designed and prepared by Fe3+ and polyimide precursor-polyamic acid triethylamine salt (PAAS) was reacted in a reactor, and the PI/Fe3O4 composite powders were synthesized under the condition of high temperature and high pressure. The obtained PI/Fe3O4 composite powders were analyzed by infrared spectroscopy, microscopic morphology and thermal properties. The morphology and structure of the samples were both characterized by scanning electron microscopy (SEM) and infrared spectroscopy (IR). The thermal properties of the composite microspheres were studied via thermogravimetric analysis (TGA) and the magnetic properties were determined by a vibrating sample magnetometer (VSM). The saturation magnetization decreases gradually, increasing the polyimide content, with a saturation magnetization of PI/Fe3O4 determined to be 20.29 emu/g.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43694750","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

Textile Sublimation Printing: GLCM Print Mottle Assessment of Black Printed Fabric 纺织品升华印花:黑色印花织物的GLCM印花斑纹评价

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-18 DOI: 10.5755/j02.ms.32465

Emilija Toshikj, Bojan Prangoski

引用次数: 0

Investigation of Thermal and Solar Properties of Aerogel Powder Coated Textiles 气凝胶粉末涂层纺织品的热、太阳能性能研究

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-06 DOI: 10.5755/j02.ms.32869

Atike Köken, Mehmet Kanık

{"title":"Investigation of Thermal and Solar Properties of Aerogel Powder Coated Textiles","authors":"Atike Köken, Mehmet Kanık","doi":"10.5755/j02.ms.32869","DOIUrl":"https://doi.org/10.5755/j02.ms.32869","url":null,"abstract":"Aerogels, the lowest-density solids in the world, have very effective thermal insulation properties with their extremely high surface area and porous structure. Recently, there has been an increasing interest in using aerogels in the textile industry, especially to obtain functional and technical textiles. In this study, thermal and solar properties of polyester fabrics coated at different concentrations (1 %, 2 %, and 4 %) of aerogels with different particle sizes (~ 8 µm, 0 – 80 µm, 0 – 0.5 mm) were investigated. It was observed that the aerogel particle size and concentration had a significant effect on the thermal and solar properties, and the lowest thermal conductivity coefficient and thermal resistance values (0.036 W/mK and 14.33 m2 K/W, respectively) appeared at the largest particle size and maximum concentration. In contrast, the solar reflectance values of the coated samples decrease up to 62 % with increasing aerogel particle size. In a conclusion, the coating method with aerogel powders could be applied to improve the thermal insulation and solar protection properties of mainly curtains, tents, tarpaulins, and sportswear fabrics.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41259220","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 Lateral Load on Local Buckling of Latex Wrapped Cold Formed Steel Columns 横向荷载对乳包冷弯钢柱局部屈曲的影响

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-03 DOI: 10.5755/j02.ms.31876

Rajivgandhi Narasimhan, J. H. Henderson

引用次数: 0

Comparative Study of Corrosion Activity of Bright and Matte Nickel Coatings in Solutions and Vapor of Acetic Acid 光亮镍镀层与哑光镍镀层在醋酸溶液和醋酸蒸气中的腐蚀活性比较研究

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-01 DOI: 10.1007/s11003-023-00696-0

D. Ushchapovskiy, O. V. Liniucheva, A. Kushmyruk, R. Redko, H. Y. Pidvashetskyi

引用次数: 0

Thermodynamic and Physical Properties of CaF2–(Al2O3–TiO2–MgO) System Slags for Electroslag Remelting of Inconel 18 Alloy Inconel 18合金电渣重熔CaF2–（Al2O3–TiO2–MgO）系渣的热力学和物理性质

IF 1.1 4区材料科学

Materials Science-medziagotyra Pub Date : 2023-01-01 DOI: 10.1007/s11003-023-00690-6

G. Stovpchenko, L. Lisova, L. Medovar, I. Goncharov

引用次数: 1