Can I read Phase Selectivity and Stability in Compositionally Complex Nano ( n A~1/ n ~)Co~2~O~4~ on EtoBox?

Phase Selectivity and Stability in Compositionally Complex Nano ( n A~1/ n ~)Co~2~O~4~ by Xin Wang; Peter Metz; Eleonora Calì; Palani Raja Jothi; Eric Andrew Lass; Katharine Page is a Materials Science article available to read on EtoBox.

What is Phase Selectivity and Stability in Compositionally Complex Nano ( n A~1/ n ~)Co~2~O~4~ about?

A family of compositionally complex spinels with the formula(nA 1/n )Co 2 O 4 (A = combinations of Mg, Cr, Mn, Fe, Co, Ni, Cu, and Zn) was synthesized using a low-temperature softtemplating method. The phase selectivity and the temperature stability window for the series were found to depend strongly upon the A-site composition and only modestly on the number of elements (n) present on the A-site. Select control reactions and in situ high-temperature X-ray diffraction (XRD) uncovered a propensity for temperature-activated de-mixing for compositions containing Mg, Ni, Mn, and Fe. The A-site cations exhibit spatially heterogeneous distributions in the as-formed spinels, which diminish with intermediate thermal annealing, as shown by scanning transmission electron microscopy (STEM)/energy dispersive spectroscopy (EDS) and X-ray line profile analysis. The single spinel phases obtained are metastable, separating into a mix of impurity phases and multiple spinel phases with higher temperature annealing. Furthermore, we demonstrate that a "continuous lattice" parameterization of the compositionally complex oxide structure provides a rapid means by which to examine the heterogeneity of the

Who reads Phase Selectivity and Stability in Compositionally Complex Nano ( n A~1/ n ~)Co~2~O~4~?

Author

Xin Wang; Peter Metz; Eleonora Calì; Palani Raja Jothi; Eric Andrew Lass; Katharine Page

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)