Advances in Materials Science and Engineering最新文献_第7页

SILICA-COPPER OXIDE COMPOSITE THIN FILMS AS SOLAR SELECTIVE COATINGS PREPARED BY DIPPING SOL GEL 用溶胶-凝胶浸渍法制备二氧化硅-氧化铜复合薄膜作为太阳能选择性涂层

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2008-03-24 DOI: 10.1155/2008/190920

C. Barrera, V. Mendez, L. Ortega

{"title":"SILICA-COPPER OXIDE COMPOSITE THIN FILMS AS SOLAR SELECTIVE COATINGS PREPARED BY DIPPING SOL GEL","authors":"C. Barrera, V. Mendez, L. Ortega","doi":"10.1155/2008/190920","DOIUrl":"https://doi.org/10.1155/2008/190920","url":null,"abstract":"Silica-copper oxide (silica-CuO) composite thin films were prepared by a dipping sol-gel route using ethanolic solutions comprised TEOS and a copper-propionate complex. Sols with different TEOS/Cu-propionate (Si/Cu) molar ratios were prepared and applied on stainless steel substrates using dipping process. During the annealing process, copper-propionate complexes developed into particulate polycrystalline CuO dispersed in a partially crystallized silica matrix, as indicated by the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. The gel thermal analysis revealed that the prepared material might be stable up to 400∘C. The silica-CuO/stainless steel system was characterized as a selective absorber surface and its solar selectivity parameters, absorptance (𝛼), and emittance (𝜀) were evaluated from UV-NIR reflectance data. The solar parameters of such a system were mostly affected by the thickness and phase composition of the SiO2-CuO film. Interestingly, the best solar parameters (𝛼 = 0.92 and 𝜀 = 0.2) were associated to the thinnest films, which comprised a CuO-Cu2O mixture immersed in the silica matrix, as indicated by XPS.","PeriodicalId":7345,"journal":{"name":"Advances in Materials Science and Engineering","volume":"2008 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2008-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2008/190920","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64163548","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: 26

Effect of Incorporating Nanoporous Metal Phosphate Materials on the Compressive Strength of Portland Cement 纳米多孔金属磷酸盐材料掺入对硅酸盐水泥抗压强度的影响

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2008-03-16 DOI: 10.1155/2008/238736

D. Wellman, K. Parker, S. Mattigod, G. Fryxell

引用次数: 0

Complex Impedance Spectroscopic Properties of BaVO Ceramics BaVO陶瓷的复阻抗光谱特性

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2008-03-13 DOI: 10.1155/2008/746256

P. Khatri, B. Behera, V. Srinivas, R. Choudhary

引用次数: 25

Influence of Nanosized Silicon Carbide on Dimensional Stability of Al/SiC Nanocomposite 纳米碳化硅对Al/SiC纳米复合材料尺寸稳定性的影响

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2008-02-24 DOI: 10.1155/2008/835746

Seyed Mojtaba Zebarjad, S. Sajjadi, E. Karimi

引用次数: 11

Raman Spectroscopy for the Nondestructive Testing of Carbon Fiber 拉曼光谱在碳纤维无损检测中的应用

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2008-01-01 DOI: 10.1155/2008/693207

G. Washer, Blum Jr.F.

引用次数: 35

Effect of Compatibilizers on the Morphological Properties of ABS and LCP Blends 增容剂对ABS和LCP共混物形态性能的影响

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2007-12-31 DOI: 10.1155/2007/18160

T. Das, K. Pal, B. Adhikari, C. Das

引用次数: 2

Synthesis and Characterization of Ceramic Nanoparticles System Based on Anatase-Doped Hematite 锐钛矿掺杂赤铁矿纳米陶瓷体系的合成与表征

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2007-12-31 DOI: 10.1155/2007/48962

M. Sorescu, L. Diamandescu, A. Sanns, D. Proch, J. Wood, V. Teodorescu

{"title":"Synthesis and Characterization of Ceramic Nanoparticles System Based on Anatase-Doped Hematite","authors":"M. Sorescu, L. Diamandescu, A. Sanns, D. Proch, J. Wood, V. Teodorescu","doi":"10.1155/2007/48962","DOIUrl":"https://doi.org/10.1155/2007/48962","url":null,"abstract":"The x TiO 2 - ( 1 − x ) α - Fe 2 O 3 ceramic nanoparticles system has been obtained by \u0000mechanochemical activation for x = 0.1 and 0.5 and \u0000for ball milling times ranging from 2 to 12 hours. \u0000Structural and morphological characteristics of the anatase-doped \u0000hematite system were investigated by X-ray diffraction (XRD), \u0000Mossbauer spectroscopy, and transmission electron microscopy \u0000(TEM) combined with electron diffraction (ED). In the XRD \u0000patterns, we could evidence the dissolution of anatase in \u0000hematite, more pronounced for x = 0.1. The Rietveld \u0000structure of the XRD patterns yielded the dependence of the \u0000particle size and lattice constants on the amount x \u0000of Ti substitutions and as function of the ball milling time. For \u0000x = 0.1, we observed line broadening of the \u0000Mossbauer resonances and corresponding fit with several \u0000subspectra. For x = 0.5, it can be observed that the \u0000central doublet corresponding to superparamagnetic particles \u0000becomes more prominent. The ball milling route allowed us to reach \u0000nanometric particle dimensions, which would make the materials \u0000very promising for catalytic and gas sensing applications.","PeriodicalId":7345,"journal":{"name":"Advances in Materials Science and Engineering","volume":"2007 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2007-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2007/48962","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64150830","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: 5

Wear of MgO-CaO-SiO2-P2O5-F-Based Glass Ceramics Compared to Selected Dental Ceramics mgo - cao - sio2 - p2o5 - f基玻璃陶瓷与选定牙科陶瓷的磨损比较

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2007-12-17 DOI: 10.1155/2007/69897

Jongee Park, G. Pekkan, A. Ozturk

引用次数: 4

An Analytical Description of the Frictional Behaviour of a Titanium Alloy 钛合金摩擦行为的解析描述

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2007-12-12 DOI: 10.1155/2007/92170

N. Christakis, A. Vairis

引用次数: 4

Growth and Characterization of Cd1−XZnXTe-Sintered Films Cd1−xznxte烧结薄膜的生长与表征

4区材料科学

Advances in Materials Science and Engineering Pub Date : 2007-12-06 DOI: 10.1155/2007/63702

V. Kumar, G. S. Sandhu, T. Sharma, M. Hussain

{"title":"Growth and Characterization of Cd1−XZnXTe-Sintered Films","authors":"V. Kumar, G. S. Sandhu, T. Sharma, M. Hussain","doi":"10.1155/2007/63702","DOIUrl":"https://doi.org/10.1155/2007/63702","url":null,"abstract":"The II-VI polycrystalline semiconducting materials have come under increased scrutiny because of their wide use in the cost reduction of devices for photovoltaic applications. Cd 1 − X Zn X Te is one of the II-VI ternary semiconductor materials whose bandgap can be tailored to any value between 1.48–2.26 eV as X varies from 0 to 1. It is promising material for high-efficiency solar cells, switching, and other optoelectronic devices. Polycrystalline thin film of Cd 1 − X Zn X Te with variable composition \u0000( 0 ≤ X ≤ 1 ) has been deposited on ultraclean glass substrates by screen printing method followed by sintering process. The optical and structural properties of Cd 1 − X Zn X Te thin films have been examined. The optical bandgap of these films is studied using reflection spectra in wavelength range of 350–900 nm by using double beam spectrophotometer. The structure of sample was determined from X-ray diffraction patterns. The films were polycrystalline in nature having wurtzite (Hexagonal) structure over the whole range studied. The lattice parameters vary almost linearly with the composition parameter X , following Vegard's law. \u0000Sintering is a very simple and viable method compared to other cost-intensive methods. The results of the present investigation will be useful in characterizing the material CdZnTe for its applications in photovoltaics.","PeriodicalId":7345,"journal":{"name":"Advances in Materials Science and Engineering","volume":"2007 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2007-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2007/63702","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64153817","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: 6