- Tytuł:
- Mechanisms of the potassium stabilization in K2Fe22O34
- Autorzy:
- Trębala, M.
- Powiązania:
- https://bibliotekanauki.pl/articles/115421.pdf
- Data publikacji:
- 2011
- Wydawca:
- Fundacja na Rzecz Młodych Naukowców
- Tematy:
-
Potassium ferrite
Styrene catalyst
potassium lost
work function
potassium desorption - Opis:
- Effect of potassium stabilization in K2Fe22O34, the principal phase of styrene catalyst is caused by doping Cr and Ce. The effect was investigated by means of potassium ion and neutral atom thermal desorption. The kinetics for K+ and K emission from undoped and Ce-, Cr-doped b-K2Fe22O34 is studied with the field reversal technique and steady-state mode in high vacuum conditions. Two main mechanisms of the stabilization were developed depending on the dopant location. Chromium is located in the structure of β-ferrite and slows down the diffusion potassium ion. Cerium segregated at the basal planes favoring the cationic state of potassium inhibits the probability of potassium atoms to leave the K2Fe22O34 surface via work function increase.
- Źródło:
-
Challenges of Modern Technology; 2011, 2, 2; 43-45
2082-2863
2353-4419 - Pojawia się w:
- Challenges of Modern Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł