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Novel synthesis of Al13-cluster based alumina materials al13簇基氧化铝材料的新合成
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00412-2
Mingsheng Wang, M. Muhammed
{"title":"Novel synthesis of Al13-cluster based alumina materials","authors":"Mingsheng Wang, M. Muhammed","doi":"10.1016/S0965-9773(99)00412-2","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00412-2","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"84 1","pages":"1219-1229"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76167866","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: 52
Refinement of α-Fe and its improvement on magnetic properties of melt-spun nanocomposite Pr2Fe14B/α-Fe magnets by low wheel speed spinning α-Fe的细化及其对熔融纺纳米复合Pr2Fe14B/α-Fe磁体磁性能的改善
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00420-1
Z Chen , Y Zhang , G.C Hadjipanayis , Q Chen , B Ma
{"title":"Refinement of α-Fe and its improvement on magnetic properties of melt-spun nanocomposite Pr2Fe14B/α-Fe magnets by low wheel speed spinning","authors":"Z Chen ,&nbsp;Y Zhang ,&nbsp;G.C Hadjipanayis ,&nbsp;Q Chen ,&nbsp;B Ma","doi":"10.1016/S0965-9773(99)00420-1","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00420-1","url":null,"abstract":"<div><p>Nanocomposite Pr<sub>2</sub>Fe<sub>14</sub><span>B/α-Fe magnets with uniform microstructure and enhanced magnetic properties have been synthesized by melt-spinning a Pr</span><sub>8</sub>Fe<sub>86</sub>B<sub>6</sub> alloy at low wheel speed range. Microstructural and magnetic studies showed that there is an optimum wheel speed (about 16.7 m/s) at which a uniform Pr<sub>2</sub>Fe<sub>14</sub>B/α-Fe structure with fine α-Fe grains (about 10 nm) is developed directly from the melt. Lower speed gives larger grains for both the 2:14:1 and α-Fe, while higher speed leads to the appearance of an amorphous phase which will result in a Pr<sub>2</sub>Fe<sub>14</sub>B/α-Fe structure with larger α-Fe grains after a subsequent crystallization annealing. Magnetic properties obtained under the optimum-quenching followed by a subsequent annealing are M<sub>s</sub> = 176.6 emu/g, M<sub>r</sub> = 118.2 emu/g, M<sub>r</sub>/M<sub>s</sub> = 0.67, H<sub>c</sub> = 5.4 kOe and (BH)<sub>m</sub><span> = 12.6 MGOe. The coercivity and energy product are about 20% higher than those obtained by crystallization of over-quenched samples due to the refinement of α-Fe size which leads to an enhanced exchange coupling between Pr</span><sub>2</sub>Fe<sub>14</sub>B and α-Fe.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"11 8","pages":"Pages 1285-1292"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00420-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746241","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: 2
Properties of the Rayleigh-distribution for particle sizing from SAS experiments SAS实验中颗粒粒度的瑞利分布特性
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00418-3
Wilfried Gille
{"title":"Properties of the Rayleigh-distribution for particle sizing from SAS experiments","authors":"Wilfried Gille","doi":"10.1016/S0965-9773(99)00418-3","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00418-3","url":null,"abstract":"<div><p>The analytic expression of the correlation function of Small-Angle Scattering of a quasi-diluted arrangement of homogeneous spheres, the diameters of which are Rayleigh-distributed, is given. Here, the second derivative of the correlation function is exactly proportional to the size distribution density of the diameters of the spheres. This is a fundamental case for the characterization of nanophases in terms of their chord-length distributions.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"11 8","pages":"Pages 1269-1276"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00418-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746243","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: 4
Solvothermal synthesis to NiE2 (E = Se, Te) nanorods at low temperature 低温溶剂热合成NiE2 (E = Se, Te)纳米棒
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00395-5
Bin Li , Yi Xie , Jiaxing Huang , Huilan Su , Yitai Qian
{"title":"Solvothermal synthesis to NiE2 (E = Se, Te) nanorods at low temperature","authors":"Bin Li ,&nbsp;Yi Xie ,&nbsp;Jiaxing Huang ,&nbsp;Huilan Su ,&nbsp;Yitai Qian","doi":"10.1016/S0965-9773(99)00395-5","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00395-5","url":null,"abstract":"<div><p>NiE<sub>2</sub> (E = Se, Te) nanorods were directly synthesized through the reaction of NiCl<sub>2</sub><span> and selenium or tellurium in an autoclave at 160 ∼ 180°C for 10 ∼ 15 h, using ethylenediamine as a solvent. X-ray powder diffraction patterns and transmission electron microscope images show that the products are cubic NiSe</span><sub>2</sub> and hexagonal NiTe<sub>2</sub> phase, respectively, in the form of well-crystallized nanorods. A possible mechanism of the formation of NiE<sub>2</sub> nanorods in the solvothermal process is proposed. The solvent ethylenediamine plays an important role in the formation of NiE<sub>2</sub> nanorods.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"11 8","pages":"Pages 1067-1071"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00395-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90034448","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: 23
Correlation between microstructure, particle size, dielectric constant, and electrical resistivity of nano-size amorphous SiO2 powder 纳米非晶SiO2粉体的微观结构、粒径、介电常数与电阻率的关系
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00398-0
T. Tepper, S. Berger
{"title":"Correlation between microstructure, particle size, dielectric constant, and electrical resistivity of nano-size amorphous SiO2 powder","authors":"T. Tepper, S. Berger","doi":"10.1016/S0965-9773(99)00398-0","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00398-0","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"22 1","pages":"1081-1089"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90578281","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: 24
Preparation and photocatalytic activity of TiO2-SiO2 binary aerogels 二氧化钛-二氧化硅二元气凝胶的制备及其光催化活性
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00423-7
Zhongsheng Deng , Jue Wang , Yulong Zhang , Zhinong Weng , Zhe Zhang , Bin Zhou , Jun Shen , Linyan Cheng
{"title":"Preparation and photocatalytic activity of TiO2-SiO2 binary aerogels","authors":"Zhongsheng Deng ,&nbsp;Jue Wang ,&nbsp;Yulong Zhang ,&nbsp;Zhinong Weng ,&nbsp;Zhe Zhang ,&nbsp;Bin Zhou ,&nbsp;Jun Shen ,&nbsp;Linyan Cheng","doi":"10.1016/S0965-9773(99)00423-7","DOIUrl":"10.1016/S0965-9773(99)00423-7","url":null,"abstract":"<div><p>The preparation, characterization and photocatalytic degradation of phenol pollutant of TiO<sub>2</sub>-SiO<sub>2</sub><span> aerogels were investigated. The aerogels were mostly turned to anatase microcrystalline after supercritical drying in ethanol. Photocatalytic degradation of phenol in water on aerogels shows that the binary aerogels have high efficiency than the commercial TiO</span><sub>2</sub> and pure TiO<sub>2</sub><span> aerogel. The photocatalytic activity of the aerogels increased with the SiO</span><sub>2</sub> content at first but came to a maximum at molar ratio = 1:1.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"11 8","pages":"Pages 1313-1318"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00423-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85372461","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: 30
Synthesis of monodisperse Au, Pt, Pd, Ru and Ir nanoparticles in ethylene glycol 单分散Au, Pt, Pd, Ru和Ir纳米颗粒在乙二醇中的合成
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00419-5
F. Bonet, V. Delmas, S. Grugeon, R. H. Urbina, P. Silvert, K. Tekaia-Elhsissen
{"title":"Synthesis of monodisperse Au, Pt, Pd, Ru and Ir nanoparticles in ethylene glycol","authors":"F. Bonet, V. Delmas, S. Grugeon, R. H. Urbina, P. Silvert, K. Tekaia-Elhsissen","doi":"10.1016/S0965-9773(99)00419-5","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00419-5","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"41 1","pages":"1277-1284"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81384443","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: 319
Local icosahedral symmetries in Al-Mo alloys prepared by ball milling 球磨制备Al-Mo合金的局部二十面体对称性
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00416-X
M. Monagheddu, F. Delogu, L. Schiffini, R. Frattini, S. Enzo
{"title":"Local icosahedral symmetries in Al-Mo alloys prepared by ball milling","authors":"M. Monagheddu, F. Delogu, L. Schiffini, R. Frattini, S. Enzo","doi":"10.1016/S0965-9773(99)00416-X","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00416-X","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"19 1","pages":"1253-1261"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82525347","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: 8
Synthesis and TEM study of nanoparticles and nanocrystalline thin films of silver by high pressure sputtering 高压溅射法制备银纳米粒子和银纳米晶薄膜及其透射电镜研究
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00408-0
R. Chandra, P. Taneja, J. John, P. Ayyub, G. K. Dey, S. K. Kulshreshtha
{"title":"Synthesis and TEM study of nanoparticles and nanocrystalline thin films of silver by high pressure sputtering","authors":"R. Chandra, P. Taneja, J. John, P. Ayyub, G. K. Dey, S. K. Kulshreshtha","doi":"10.1016/S0965-9773(99)00408-0","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00408-0","url":null,"abstract":"","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"19 1","pages":"1171-1179"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72702429","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: 33
Synthesis and TEM study of nanoparticles and nanocrystalline thin films of silver by high pressure sputtering 高压溅射法制备银纳米粒子和银纳米晶薄膜及其透射电镜研究
Nanostructured Materials Pub Date : 1999-11-01 DOI: 10.1016/S0965-9773(99)00408-0
Ramesh Chandra , Praveen Taneja , J John , Pushan Ayyub , G.K Dey , S.K Kulshreshtha
{"title":"Synthesis and TEM study of nanoparticles and nanocrystalline thin films of silver by high pressure sputtering","authors":"Ramesh Chandra ,&nbsp;Praveen Taneja ,&nbsp;J John ,&nbsp;Pushan Ayyub ,&nbsp;G.K Dey ,&nbsp;S.K Kulshreshtha","doi":"10.1016/S0965-9773(99)00408-0","DOIUrl":"https://doi.org/10.1016/S0965-9773(99)00408-0","url":null,"abstract":"<div><p><span>High pressure magnetron sputtering<span> is a very promising technique for the controlled synthesis of nanocrystalline thin films as well as </span></span>nanoparticles<span><span> of various systems. Here we discuss the conditions necessary for the synthesis of nanocrystalline silver both in the thin film and powder forms. The formation of the nanophase material occurs in a relatively high pressure of inert gas and at low substrate temperatures (77–300 K). The mean crystallographic domain size of the nanocrystalline silver thus synthesized was found to lie in the 3–60 nm range. The growth pattern and morphology of the sputter-deposited nano-grains were studied in detail using </span>transmission electron microscopy<span> and atomic force microscopy.</span></span></p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":"11 8","pages":"Pages 1171-1179"},"PeriodicalIF":0.0,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00408-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91746036","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: 33
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