Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 35 (2000), S. 3365-3371 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Preferred orientation was measured in Si3N4/BN fibrous monolithic ceramics using x-ray diffraction. The materials were manufactured by co-extrusion of polymer binder/ceramic blends which were subsequently pyrolized and then hot-pressed to produced a fully dense ceramic composite. A very strong modified wire texture was present in the BN with the basal planes aligned parallel to the axis of extrusion due to shear-induced reorientation of the platelet-shaped BN particles during co-extrusion. Texture was also observed in the Si3N4 and was attributed to a combination of co-extrusion and hot-pressing. After hot pressing, the basal planes of the rod-shaped β-Si3N4 were observed to be preferentially aligned perpendicular to the extrusion direction. Measurements prior to hot-pressing revealed that a small amount (≈5%) of β-Si3N4 was present in the α-Si3N4 starting powder. Although texturing of the predominant α-Si3N4 did not occur during co-extrusion, significant texturing of the β-Si3N4 was observed. During subsequent hot-pressing, the pre-existing textured β-Si3N4 particles appeared to act as seeds for transformation and preferred growth of rod-shaped β grains parallel to the axis of extrusion.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 12
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 458 (1979), S. 163-167 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Characterization of a New Cyclic Silicon Chloride Si4Cl8Starting from octaphenylcyclotetrasilane, a cleavage of all the phenyl-silicon bonds yields the cyclic Si4Cl8. The properties and the structure of this strainght ring system were investigated and discussed.
    Notes: Durch Abspaltung der Phenylreste mittels HCl/AlCl3 entsteht aus Octaphenylcyclotetrasilan das ebenfalls ringförmig gebaute Si4Cl8. Die Struktur und Eigenschaften dieses gespannten Si-Ringsystems wurden untersucht und diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 13
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 459 (1979), S. 123-130 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Characterization of Cyclohexasilane Si6H12A preparation route is described in detail for the first synthesis of Si6H12, starting from the full phenylated Si6-cycle. With the aid of AlCl3/HCl all phenyl groups are splitted off and the yielded Si6Cl12 is hydrogenated with LiAlH4. Si6H12 is characterized by means of different kinds of spectras and their properties.
    Notes: Es wird eine Darstellungsmethode für die erstmalige Synthese von Si6H12 aus dem perphenyliertem Si6-Ring ausführlich beschrieben, wobei man mittels AlCl3/HCl erst alle Phenylgruppen abspaltet und das entstandene Si6Cl12 mit LiAlH4 hydriert. Si6H12 wird durch verschiedene Spektren und seine Eigenschaften charakterisiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 488 (1982), S. 27-37 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Spectroscopie Properties of Some Perbromo- and PeriodooligosilanesThe cleavage of octaphenylcyclotetrasilane and decaphenylcyclopentasilane with Iodine, phosphorus pentabromide and bromine and the successive reaction with HBr/AlBr3 or HI/AlI3 give n-Si4Br10, n-Si5Br12, n-Si4I10, and n-Si5I12. Their IR and Raman spectra are discussed with the aid of a normal coordinate analysis. The spectra of the cyclic iodosilanes Si4I8, Si5I10, and Si6I12, prepared previously [1], are included in the discussion.
    Notes: Die Spaltung von Oktaphenylcyclotetrasilan und Dekaphenylcyclopentasilan mit Iod, Phosphorpentabromid oder Brom und anschließende Umsetzung mit HBr/AlBr3 bzw. HI/AlI3 erlaubt die Darstellung der bisher unbekannten Halogensilane n-Si4Br10, n-Si4I10, n-Si5Br12 und n-Si5I12. Ihre IR- und Raman-Spektren werden mit Hilfe einer Normalkoordinatenanalyse diskutiert. Jene der kürzlich dargestellten [1] cyclischen Iodsilane Si4I8, Si5I10 und Si6I12 werden mit einbezogen.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...