Moessbauer Investigation of the Influence of Al(III) Ions on the Properties of Mixed Fe(III)-Al(III) Hydroxides and Oxides
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Physica Status Solidi (A) Applied Research (1969-2004)
ISSN: 0031-8965
|
| Вых. Данные |
Год: 1989,
Том: 113,
Номер: 2,
Страницы: 359-364
Страниц
: 6
DOI:
10.1002/pssa.2211130214
|
| Авторы |
Kuznetsov V.I.
1
,
Yurchenko E.N.
1
,
Protasova M.T.
1
,
Taraban E.A.
1
,
Krivoruchko O.P.
1
,
Buyanov R.A.
1
|
| Организации |
| 1 |
Institute of Catalysis, Academy of Sciences of the USSR, Siberian Branch
|
|
Phase composition and components of mixed Fe(III)–Al(III) hydroxides and oxides obtained by ageing the hydroxides are examined mainly by Mössbauer spectroscopy over a wide range of the Al/Fe atomic ratio. The α-(Fe1–cAlc)2O3 type oxide and the orthorhombic Al2O3, boehmite, are identified in the system studied. An analysis of Heff as a function of c indicates that the maximum value of c ranges from 0.31 to 0.33 regardless of the mixed oxide preparation method. An analysis of the recoil-free fraction f′(T) and a subsequent calculation of the force constants of the iron–oxygen bonds show that an increase in “c” leads to their weakening.