The Formation of Cr-Al Spinel under a Reductive Atmosphere
In the present work, for the first time, the possibility of formation of CrAl<sub>2</sub>O<sub>4</sub> was shown from the equimolar mixture of co-precipitated Al<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> oxides un...
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| Online Access: | https://www.mdpi.com/1996-1944/14/12/3218 |
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| author | Oleksandr Shtyka Waldemar Maniukiewicz Radoslaw Ciesielski Adam Kedziora Viktar Shatsila Tomasz Sierański Tomasz Maniecki |
| author_facet | Oleksandr Shtyka Waldemar Maniukiewicz Radoslaw Ciesielski Adam Kedziora Viktar Shatsila Tomasz Sierański Tomasz Maniecki |
| author_sort | Oleksandr Shtyka |
| collection | DOAJ |
| description | In the present work, for the first time, the possibility of formation of CrAl<sub>2</sub>O<sub>4</sub> was shown from the equimolar mixture of co-precipitated Al<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> 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<sub>2</sub>O<sub>4</sub> is not stable under ambient conditions and easily undergoes oxidation to α-Al<sub>2</sub>O<sub>3</sub> and α-Cr<sub>2</sub>O<sub>3</sub>. The overall sequence of the phase transformations of co-precipitated oxides leading to the formation of spinel structure is proposed. |
| first_indexed | 2024-03-10T10:30:54Z |
| format | Article |
| id | doaj.art-0b16dc8e7e534732a6abb6f6a99cc42f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:30:54Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0b16dc8e7e534732a6abb6f6a99cc42f2023-11-21T23:38:39ZengMDPI AGMaterials1996-19442021-06-011412321810.3390/ma14123218The Formation of Cr-Al Spinel under a Reductive AtmosphereOleksandr Shtyka0Waldemar Maniukiewicz1Radoslaw Ciesielski2Adam Kedziora3Viktar Shatsila4Tomasz Sierański5Tomasz Maniecki6Institute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandInstitute of General and Ecological Chemistry, Lodz University of Technology, 90924 Lodz, PolandIn the present work, for the first time, the possibility of formation of CrAl<sub>2</sub>O<sub>4</sub> was shown from the equimolar mixture of co-precipitated Al<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> 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<sub>2</sub>O<sub>4</sub> is not stable under ambient conditions and easily undergoes oxidation to α-Al<sub>2</sub>O<sub>3</sub> and α-Cr<sub>2</sub>O<sub>3</sub>. The overall sequence of the phase transformations of co-precipitated oxides leading to the formation of spinel structure is proposed.https://www.mdpi.com/1996-1944/14/12/3218Al<sub>2</sub>O<sub>3</sub>Cr<sub>2</sub>O<sub>3</sub>CrCrAlO<sub>3</sub>spinelreduction process |
| spellingShingle | Oleksandr Shtyka Waldemar Maniukiewicz Radoslaw Ciesielski Adam Kedziora Viktar Shatsila Tomasz Sierański Tomasz Maniecki The Formation of Cr-Al Spinel under a Reductive Atmosphere Materials Al<sub>2</sub>O<sub>3</sub> Cr<sub>2</sub>O<sub>3</sub> Cr CrAlO<sub>3</sub> spinel reduction process |
| 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 | Al<sub>2</sub>O<sub>3</sub> Cr<sub>2</sub>O<sub>3</sub> Cr CrAlO<sub>3</sub> spinel reduction process |
| url | https://www.mdpi.com/1996-1944/14/12/3218 |
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