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Journal of thermal analysis

, Volume 18, Issue 2, pp 359–369 | Cite as

The catalytic effects of metal oxides on thermal decomposition reactions, III

The influence of structural and electronic defects in iron oxides on their catalytic effectiveness with respect to the thermal decomposition of potassium chlorate
  • W. K. Rudloff
  • E. S. Freeman
Article

Abstract

The catalytic activity of a series of iron oxides on the thermal decomposition of potassium chlorate was investigated by methods of thermal analysis. Structural and electronic defects were introduced into the oxide by doping, heat treatment in different atmospheres, and irradiation withγ-rays. These induced defects changed in a systematic way the conductive properties of the iron oxides and correspondingly, their catalytic activity. The results are consistent with ann-type semiconductive behavior of the oxides.

Keywords

Oxide Polymer Heat Treatment Catalytic Activity Thermal Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Zusammenfassung

Die katalytische Aktivität einer Reihe von Eisenoxiden gegenüber der thermischen Zersetzung von Kaliumchlorat wurde durch Methoden der Thermoanalyse untersucht. Strukturelle und elektronische Defekte wurden in das Oxid durch Dosierung, Wärmebehandlung in verschiedenen Atmosphären und Bestrahlung mitγ-Strahlen eingebaut. Diese induzierten Defekte änderten systematisch die Leitfähigkeitseigenschaften der Eisenoxide und dementsprechend ihre katalytische Aktivität. Die Ergebnisse stimmen mit dem Halbleiterverhalten desn-Typs der Oxide gut überein.

Резюме

Методами термическо го анализа была исследована каталит ическая активность ряда окисей железа на процесс термическог о разложения хлората к алия. Структурные и электронные дефекты были наведены в окиси путем легирования, теплово й обработки в различных атмосфера х и облучением рентге новскими лучами. Эти наведенны е дефекты систематически изме няли проводимость ок исей железа и, соответственно, их к аталитическую активность. Результа ты указывают на то, что окиси железа являютс яn-полупроводниками.

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Copyright information

© Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest 1980

Authors and Affiliations

  • W. K. Rudloff
    • 1
  • E. S. Freeman
  1. 1.University of Petroleum and Minerals Dhahran International AirportDhahranSaudi Arabia

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