Abstract: The method for the synthesis of defective magnesium oxide by hydration of initial MgO in a magnesium acetate solution followed by drying and calcining is suggested. The mechanism of the formation of defective magnesium oxide is studied by LR spectroscopy, W-VIS diffuse-reflectance spectroscopy, X-ray diffraction analysis, electron microscopy, and thermogravimetry. It is shown that a metastable Mg(OH)(x) . Ac-y . nH(2)O (I) compound with a structure of magnesium hydroxide is formed in a MgAc2 solution during the hydration of MgO. At 235 degrees C, this compound is rearranged into Mg(OH)(x) . Ac-y hydroxyacetate (II) of a variable composition, which depends on the degree of substitution of acetate groups for hydroxyl groups and is responsible for the rate of solid-phase transformations. Less stable hydroxyacetates begin to transform to defective magnesium oxide at 335 degrees C, and this transformation is completed at 370 degrees C. The modification of magnesium oxide with admired acetate ions occurs during the formation of its structure. At high temperatures, acetate ions in the MgO structure are converted into carbonate ions, which are retained in MgO after calcination at 1000 degrees C.

Cite: Kuzʹmitskaya S.Y. , Odegova G.V. , Vasilʹeva N.A. , Plyasova L.M. , Kriger T.A. , Zaikovskii V.I.
Defective Magnesium Oxide: Synthesis and Studies of Structure Formation
Kinetics and Catalysis. 1997. V.38. N6. P.848-854. WOS Scopus РИНЦ ANCAN

Original: Кузьмицкая С.Ю. , Одегова Г.В. , Васильева Н.А. , Плясова Л.М. , Кригер Т.А. , Зайковский В.И.
Дефектный оксид магния: синтез и исследование формирования структуры
Кинетика и катализ. 1997. Т.38. №6. С.921-928. РИНЦ

Dates:

Submitted:

Apr 4, 1996

Identifiers:

Web of science:	WOS:000071180900021
Scopus:	2-s2.0-0012449619
Elibrary:	13271197
Chemical Abstracts:	1998:18798
Chemical Abstracts (print):	128:53726

Citing:

DB	Citing
Web of science	5
Scopus	7
Elibrary	13