Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • 2000-2004  (1)
  • 1970-1974  (2)
Source
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Corrosion of alumina ceramics in acidic aqueous solutions at high temperatures and pressures (2000)
    Springer
    Journal of materials science 35 (2000), S. 6251-6258 
    Details
    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 Alumina is resistant against corrosive aqueous solutions and could be used as a reactor material in the Supercritical Water Oxidation (SCWO) process. For this reason, the corrosion resistance of alumina and zirconia toughened alumina (ZTA) ceramics was investigated in aqueous solutions containing 0.1 mol/kg H2SO4, H3PO4 or HCl at T = 240°C–500°C at p = 27 MPa. In sulfuric acid, the solubility of alumina and its corrosion products was high at temperatures of 240°C–290°C. The corrosion rate was still high at higher temperatures (340°C–500°C), but the corrosion products were less soluble and formed a non-protecting scale on the samples. Phosphoric acid was less corrosive due to the formation of berlinite (AlPO4) on the surface of the specimens. In hydrochloric acid, the dissolution of the alumina grains was the predominant corrosion phenomenon at temperatures of 240°C–290°C. At higher temperatures, intergranular corrosion was observed, but a dissolution of the grains did not occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026714218522
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Kobalt(III)-Chelate des Diacetylmonoxim-anils (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 373 (1970), S. 279-284 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: With diacetylmonoxim anil (Dma) cobalt(III) forms chelates of the types [Co(Dma)(Dma - H)X2], [Co(Dma - H)2(C5H5N)X], and [Co(Dma - H)3]. Basing on the visible and infrared spectra, the bonding and the structures of these coordination compounds are discussed. By the reaction between [Co(Dma - H)2(C5H5N)Cl] and C6H5MgBr [Co(Dma - H)2(C5H5N)(C6H5)] is produced. In this compound the phenyl group is directly bound to cobalt.
    Notes: Diacetylmonoxim-anil(Dma) bildet mit Kobalt(III) Chelate der Typen [Co(Dma)(Dma - H)X2], [Co(Dma - H)2(C5H5N)X] und [Co(Dma - H)3]. Anhand von Spektren im sichtbaren und infraroten Bereich werden die Struktur und die Bindungsverhältnisse in diesen Komplexen diskutiert. [Co(Dma - H)2(C5H5N)Cl] reagiert mit Phenylmagnesiumbromid zum [Co(Dma - H)2(C5H5N)(C6H5)], in dem eine Kobalt - Kohlenstoff-Bindung vorliegt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19703730310
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Anomales magnetisches Verhalten bei Kobalt(II)-Komplexen des Diacetylmonoxim-anils (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 384 (1971), S. 27-33 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: With cobalt(II) perchlorate and bases (B = pyridine, triphenyl phosphine, aniline, tributyl amine) diacetylmonoxime anil (Dma) forms chelates of the composition [Co(Dma)(Dma-H)B]ClO4 and [Co(Dma)(Dma-H)]ClO4 (VI). Evidently, in the solid state these complexes are dimeric with a cobalt-cobalt bond. Because of sterical reasons there is a relatively long distance between the two metal atoms, and an incomplete spin compensation occurs (magnetic moments between 302 and 306 B.M.). On reaction with liquid or gaseous ammonia VI forms [Co(Dma)(Dma-H)(NH3)2]ClO4 or [Co(Dma)(Dma-H)(NH3)]ClO4. Both compounds show a behaviour characteristical for cobalt(II) complexes of the low-spin-type.
    Notes: Diacetylmonoxim-anil (Dma) bildet mit Kobalt(II)-perchlorat in Gegenwart von Basen (B = Pyridin, Triphenylphosphin, Anilin, Tributylamin) Chelate der Zusammensetzung [Co(Dma)(Dma-H)B]ClO4 bzw. [Co(Dma)(Dma-H)]ClO4 (VI). Offensichtlich sind diese Komplexe im kristallinen Zustand dimer mit einer Kobalt-Kobalt-Bindung. Aus sterischen Gründen bleibt jedoch der Abstand der beiden Zentralatome relativ groß, und es erfolgt keine vollständige Spinkompensation. Daraus erklären sich die magnetischen Momente der Verbindungen, die bei 3,2 bis 3,6 B.M. liegen. Bei Behandlung mit flüssigem bzw. gasförmigen Ammoniak geht VI in [Co(Dma)(Dma-H)(NH3)2]ClO4 bzw. [Co(Dma)(Dma-H)(NH3)]ClO4 über. Beide Verbindungen zeigen das für Kobalt(II)-Komplexe von Low-spin-typ charakteristische Verhalten.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19713840105
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...