ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 181 (1962), S. 46-49 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Ultraschallbestrahlung (1 MHz, 225 Watt/cm2) kann erfolgreich zur Präparation stabiler kolloidaler Kobaltohydroxydsole mit positiver Ladung angewandt werden. Bei einer solchen Bestrahlung wird das Sol stabiler. Die spez. Leitfähigkeit und die Wasserstoffionen-Konzentrationen des Sols steigt kontinuierlich mit der Zeit der Ultraschallbestrahlung. Die Viskosität des Sols nimmt entsprechend ab. Die optische Dichte und die Koagulationswerte mit Elektrolyten steigen ebenfalls mit der Bestrahlung. Die Stabilität des Sols ist wahrscheinlich der Erhöhung der positiven Ladung der Kolloidpartikel zuzuschreiben, da die Wasserstoffionen-Konzentration des Sols mit Bestrahlung steigt. Der Wechsel in der Farbe ist der Umformung von Kobalto- zu Kobaltihydroxyd durch die Ultraschallwellen zuzuschreiben.
    Notes: Summary Ultrasonic agency (1 Mc/s 225 watts per sq. cm. output) can be successfully utilised for the preparation of rather a stable colloidal cobaltous hydroxide sol bearing a positive charge. On exposing this sol to ultrasonic waves, it becomes more stable. The specific conductivity and hydrogen ion concentration of the sol continuously increases with the time of exposure to ultrasonic waves. The viscosity of the sol decreases with the time of exposure to ultrasonic waves. The optical density and coagulation values with electrolytes also increase on exposing the sol to ultrasonic waves. The stability of the sol is probably due to the increase in positive charge on the colloidal particles as the hydrogen ion concentration of the sol has increased on exposure. The change in colour is due to transformation of cobaltous to cobaltic hydroxide by ultrasonic waves.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...