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  • 1
    Electronic Resource
    Electronic Resource
    Nanostructured and Multilayered Al〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 Thin Films Obtained by Sol-Gel Method (2001)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 206-213 (Dec. 2001), p. 575-578 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/45/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.206-213.575.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal Stability of SiO2-Based Inorganic-Organic Hybrid Materials (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 191-198 
    Details
    ISSN: 1572-8943
    Keywords: inorganic-organic hybrids ; molecular species ; thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The hydrolysis-polycondensation of organically modified Si-alkoxides leads to the obtaining of inorganic-organic hybrid materials in which the organic moieties remain as permanent groups bonded to the inorganic network. The molecular species previously determinated by GC-MS during the gelation process have been significantly different according to the type of the alkoxide used. In the present work, thermal stability of SiO2-based inorganic-organic hybrid materials starting with TEOS (tetraethoxysilan), MTEOS (triethoxymethylsilan), VTEOS (triethoxyvinylsilan) and MTMOS (trimethoxymethylsilan) was studied. The molecular structure of the gels obtained determines differences in their thermal behaviour. Gels obtained starting with MTEOS show the highest thermal stability, while gels obtained using VTEOS the lowest, among the substituted alkoxides. A particular behaviour presents the gel obtained with MTMOS that decomposes in four steps. This could be explained by the presence in the gel of some prevalent types of molecular species with different thermal stability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010132703144
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    SiO2-Iron Oxide Composites Obtained by Sol-Gel Method (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 631-635 
    Details
    ISSN: 1573-4846
    Keywords: SiO2-iron oxide system ; sol-gel method ; nanocomposite materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Composite SiO2-iron oxide materials were prepared by three experimental procedures. In the first case (1), the iron oxides were precipitated during the sol-gel process. In the second case (2), the SiO2 matrix was initially obtained, and the iron oxides were formed by thermal treatment after impregnation of a soluble Fe2+ salt in the previously processed matrix. In the third method (3), ferrite powders, prepared by wet chemical method, were embedded into a SiO2 based sol-gel matrix. Two type of precursors (tetraethoxysilane (TEOS) or methyltriethoxysilane (MTEOS) were used as SiO2 sources. Various properties versus both type of precursor and on the method of preparation were noticed. Materials with high porosity and nano-sized iron oxide content could be prepared using the mentioned above methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008722506918
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sol-Gel Poly-Component Nano-Sized Oxide Powders (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 409-412 
    Details
    ISSN: 1573-4846
    Keywords: Al2O3–TiO2–MgO sol-gel system ; Al2O3–TiO2–SiO2 sol-gel system ; poly-component powders ; tialite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Nano-sized, amorphous and monodispersed poly-component powders in the Al2O3–TiO2–MgO and Al2O3–TiO2–SiO2 systems have been obtained by the sol-gel method. These powders have been characterized by XRD, IR spectroscopy, DTA/TGA and EDAX spectrometry. This last method confirmed the composition of the ternary powders, which are formed during the gelation process. The powders were tested as precursors for obtaining advanced ceramics, as tialite, Al2TiO5. The samples prepared with powders obtained by sol-gel method have shown a high reactivity, and the formation of tialite was improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008735127136
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  • 5
    Electronic Resource
    Electronic Resource
    Composite SiO2—Iron Oxide Materials for Magnetically Intensified Adsorption (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 246 (2000), S. 557-563 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Composite SiO2—iron oxide materials were prepared by three experimental procedures. In the first case, the iron oxides were precipitated during a sol-gel process. In the second case, a SiO2 matrix was initially obtained, and the iron oxides were formed by thermal treatment after impregnation of a soluble Fe2+ salt in the previously processed matrix. In the third method, ferrite powders, prepared by wet chemical method, were embedded into a SiO2 based sol-gel matrix. Materials with convenient porosity and nano-sized iron oxide content could be prepared using the mentioned methods. The prepared composite has been tested for arsenic(V) removal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006788806079
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    Paper (German National Licenses)
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