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Impact of Precursor Preparation on Density of Gadolinium Iron Garnets Synthesized via Reactive Sintering by Lach, R. (author);Stan, M. (author);Łańcucki, Ł. (author);Gajewska, M. (author) is a Materials Science article available to read on EtoBox.

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Gadolinium iron garnet was obtained from two different precursors, homogenized in isopropyl alcohol and in an aqueous environment with a fixed pH. In the first case, it was a mixture of goethite (FeO(OH)) and gadolinium oxide (Gd 2 O 3 ); in the second, a mixture of GdIP (GdFeO 3 ) and α-Fe 2 O 3 . Conditions of homogenization in the aqueous environment were selected based on the zeta (ξ) potential measurements as the function of pH. DSC measurements of the output powder mixtures allowed the identification of the effects observed during the temperature rise. In the case of the material obtained from a mixture of goethite (FeO(OH)) and gadolinium oxide, with the increasing temperature, we observe three effects, the first of which corresponds to the phase transformation of goethite into α-Fe 2 O 3 , the second corresponds to the reaction of gadolinium iron perovskite (GdIP) formation, and the third to the reaction in which a gadolinium iron garnet (GdIG) is formed. However, in the case of heat treatment of the mixture of GdIP and α-Fe 2 O 3 , we only observe the effect responsible for a solid state reaction leading to the formation of gadolinium iron garnet. Dilatometric measurements

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Author

Lach, R. (author);Stan, M. (author);Łańcucki, Ł. (author);Gajewska, M. (author)

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)