The Formation of Cr-Al Spinel under a Reductive Atmosphere

In the present work, for the first time, the possibility of formation of CrAl(2)O(4) was shown from the equimolar mixture of co-precipitated Al(2)O(3) and Cr(2)O(3) oxides under a reductive environment. The crystallographic properties of the formed compound were calculated using the DICVOL procedure...

Descripción completa

Detalles Bibliográficos
Autores principales: Shtyka, Oleksandr, Maniukiewicz, Waldemar, Ciesielski, Radoslaw, Kedziora, Adam, Shatsila, Viktar, Sierański, Tomasz, Maniecki, Tomasz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8230446/
https://www.ncbi.nlm.nih.gov/pubmed/34200900
http://dx.doi.org/10.3390/ma14123218
_version_ 1783713211435974656
author Shtyka, Oleksandr
Maniukiewicz, Waldemar
Ciesielski, Radoslaw
Kedziora, Adam
Shatsila, Viktar
Sierański, Tomasz
Maniecki, Tomasz
author_facet Shtyka, Oleksandr
Maniukiewicz, Waldemar
Ciesielski, Radoslaw
Kedziora, Adam
Shatsila, Viktar
Sierański, Tomasz
Maniecki, Tomasz
author_sort Shtyka, Oleksandr
collection PubMed
description In the present work, for the first time, the possibility of formation of CrAl(2)O(4) was shown from the equimolar mixture of co-precipitated Al(2)O(3) and Cr(2)O(3) oxides under a reductive environment. The crystallographic properties of the formed compound were calculated using the DICVOL procedure. It was determined that it has a cubic crystal structure with space group Fd-3m and a unit cell parameter equal to 8.22(3) Å. The formed CrAl(2)O(4) is not stable under ambient conditions and easily undergoes oxidation to α-Al(2)O(3) and α-Cr(2)O(3). The overall sequence of the phase transformations of co-precipitated oxides leading to the formation of spinel structure is proposed.
format Online
Article
Text
id pubmed-8230446
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-82304462021-06-26 The Formation of Cr-Al Spinel under a Reductive Atmosphere Shtyka, Oleksandr Maniukiewicz, Waldemar Ciesielski, Radoslaw Kedziora, Adam Shatsila, Viktar Sierański, Tomasz Maniecki, Tomasz Materials (Basel) Article In the present work, for the first time, the possibility of formation of CrAl(2)O(4) was shown from the equimolar mixture of co-precipitated Al(2)O(3) and Cr(2)O(3) oxides under a reductive environment. The crystallographic properties of the formed compound were calculated using the DICVOL procedure. It was determined that it has a cubic crystal structure with space group Fd-3m and a unit cell parameter equal to 8.22(3) Å. The formed CrAl(2)O(4) is not stable under ambient conditions and easily undergoes oxidation to α-Al(2)O(3) and α-Cr(2)O(3). The overall sequence of the phase transformations of co-precipitated oxides leading to the formation of spinel structure is proposed. MDPI 2021-06-10 /pmc/articles/PMC8230446/ /pubmed/34200900 http://dx.doi.org/10.3390/ma14123218 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shtyka, Oleksandr
Maniukiewicz, Waldemar
Ciesielski, Radoslaw
Kedziora, Adam
Shatsila, Viktar
Sierański, Tomasz
Maniecki, Tomasz
The Formation of Cr-Al Spinel under a Reductive Atmosphere
title The Formation of Cr-Al Spinel under a Reductive Atmosphere
title_full The Formation of Cr-Al Spinel under a Reductive Atmosphere
title_fullStr The Formation of Cr-Al Spinel under a Reductive Atmosphere
title_full_unstemmed The Formation of Cr-Al Spinel under a Reductive Atmosphere
title_short The Formation of Cr-Al Spinel under a Reductive Atmosphere
title_sort formation of cr-al spinel under a reductive atmosphere
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8230446/
https://www.ncbi.nlm.nih.gov/pubmed/34200900
http://dx.doi.org/10.3390/ma14123218
work_keys_str_mv AT shtykaoleksandr theformationofcralspinelunderareductiveatmosphere
AT maniukiewiczwaldemar theformationofcralspinelunderareductiveatmosphere
AT ciesielskiradoslaw theformationofcralspinelunderareductiveatmosphere
AT kedzioraadam theformationofcralspinelunderareductiveatmosphere
AT shatsilaviktar theformationofcralspinelunderareductiveatmosphere
AT sieranskitomasz theformationofcralspinelunderareductiveatmosphere
AT manieckitomasz theformationofcralspinelunderareductiveatmosphere
AT shtykaoleksandr formationofcralspinelunderareductiveatmosphere
AT maniukiewiczwaldemar formationofcralspinelunderareductiveatmosphere
AT ciesielskiradoslaw formationofcralspinelunderareductiveatmosphere
AT kedzioraadam formationofcralspinelunderareductiveatmosphere
AT shatsilaviktar formationofcralspinelunderareductiveatmosphere
AT sieranskitomasz formationofcralspinelunderareductiveatmosphere
AT manieckitomasz formationofcralspinelunderareductiveatmosphere

Ejemplares similares