Research output: Contribution to journal › Article › peer-review
Peculiarities in the formation of spinels with the composition Mn-Al = 1 : 1 in oxidizing, inert or reducing media. / Bulavchenko, Olga A.; Afonasenko, Tatyana N.; Tsyrul'nikov, Pavel G. et al.
In: Materials Chemistry and Physics, Vol. 216, 01.09.2018, p. 37-41.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Peculiarities in the formation of spinels with the composition Mn-Al = 1
T2 - 1 in oxidizing, inert or reducing media
AU - Bulavchenko, Olga A.
AU - Afonasenko, Tatyana N.
AU - Tsyrul'nikov, Pavel G.
AU - Cherepanova, Svetlana V.
AU - Tsybulya, Sergey V.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - The study revealed peculiarities in the formation of mixed oxides with the Mn3-xAlxO4 spinel structure that were obtained from initial simple oxides β-Mn3O4 and γ-Al2O3 by calcination in various media at 600–1200 °C. The phase composition of the samples treated in air, argon or hydrogen was investigated using ex situ and in situ X-ray diffraction. It was shown that the occurrence of phase transformations depends on the treatment conditions and is related to the charge state of manganese cations. A scheme of the structural transformations induced by temperature and medium was proposed. The formation temperature of spinel was found to decreases from 950 to 600 °C when the oxidizing medium is replaced by the reducing one. Mn3-xAlxO4 spinel (x ∼ 1.5) was produced in air at temperatures above 1050 °C or in an inert medium at 800–1200 °C.
AB - The study revealed peculiarities in the formation of mixed oxides with the Mn3-xAlxO4 spinel structure that were obtained from initial simple oxides β-Mn3O4 and γ-Al2O3 by calcination in various media at 600–1200 °C. The phase composition of the samples treated in air, argon or hydrogen was investigated using ex situ and in situ X-ray diffraction. It was shown that the occurrence of phase transformations depends on the treatment conditions and is related to the charge state of manganese cations. A scheme of the structural transformations induced by temperature and medium was proposed. The formation temperature of spinel was found to decreases from 950 to 600 °C when the oxidizing medium is replaced by the reducing one. Mn3-xAlxO4 spinel (x ∼ 1.5) was produced in air at temperatures above 1050 °C or in an inert medium at 800–1200 °C.
KW - Aluminum oxide
KW - In situ XRD
KW - Manganese oxide
KW - Phase transformation
KW - Spinel
KW - COMBUSTION
KW - TOTAL OXIDATION CATALYSTS
KW - MN-AL-O
KW - CO OXIDATION
KW - MANGANESE OXIDE
KW - ALUMINA
KW - PHASE-COMPOSITION
KW - THERMAL-ACTIVATION
KW - X-RAY
KW - MN1.5AL1.5O4
UR - http://www.scopus.com/inward/record.url?scp=85049345977&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2018.05.034
DO - 10.1016/j.matchemphys.2018.05.034
M3 - Article
AN - SCOPUS:85049345977
VL - 216
SP - 37
EP - 41
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
ER -
ID: 14318179