Lutsas A. Reaction Mechanisms of Magnesium Ferrite-Chromites Formation Received through the Coprecipitation Method and by Solid Phase Interactions.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0406U003507

Thesis Registration Form

0406U003507.pdf

Applicant for

Specialization

  • 02.00.21 - Хімія твердого тіла

30-06-2006

Specialized Academic Board

К 20.051.03

Essay

Thesis is devoted to the theoretical and experimental investigations of mechanisms of magnesium ferrite-chromites formation from co-precipitated hydroxides and oxide mixtures using the titrimetric, differential thermal and thermal gravimetric, X-ray structural and Moessbauer analysis methods. The conditions of magnesium, iron and chromium hydroxides co-precipitation are defined. The presence of chemical hydroxide interactions in co-precipitation and formation of polymer type hydroxide-complexes as spinel pre-structure are proven. It is shown that the fore-structure benefits the spinel formation in mild conditions - at the heating in mother solution and sintering at 873-973 K.

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