Nanoscale effects on thermodynamics and phase equilibria in oxide systems

A Navrotsky - ChemPhysChem, 2011 - Wiley Online Library
Because different solid materials (phases) have different surface energies, equilibria among
them will be significantly affected by particle size. This Minireview summarizes experimental …

What is in a name: Defining “high entropy” oxides

M Brahlek, M Gazda, V Keppens, AR Mazza… - APL Materials, 2022 - pubs.aip.org
High entropy oxides are emerging as an exciting new avenue to design highly tailored
functional behaviors that have no traditional counterparts. Study and application of these …

On the thermodynamic stability of nanocrystalline ceramics

RHR Castro - Materials letters, 2013 - Elsevier
Nanomaterials have intrigued the scientific community for many years due to their unique
and unexpected properties. Though the number of technological applications has …

Nanophase transition metal oxides show large thermodynamically driven shifts in oxidation-reduction equilibria

A Navrotsky, C Ma, K Lilova, N Birkner - science, 2010 - science.org
Knowing the thermodynamic stability of transition metal oxide nanoparticles is important for
understanding and controlling their role in a variety of industrial and environmental systems …

High-surface-area corundum by mechanochemically induced phase transformation of boehmite

AP Amrute, Z Łodziana, H Schreyer, C Weidenthaler… - Science, 2019 - science.org
In its nanoparticulate form, corundum (α-Al2O3) could lead to several applications. However,
its production into nanoparticles (NPs) is greatly hampered by the high activation energy …

High-surface-area corundum nanoparticles by resistive hotspot-induced phase transformation

B Deng, PA Advincula, DX Luong, J Zhou… - Nature …, 2022 - nature.com
High-surface-area α-Al2O3 nanoparticles are used in high-strength ceramics and stable
catalyst supports. The production of α-Al2O3 by phase transformation from γ-Al2O3 is …

Hierarchically assembled porous ZnO nanoparticles: synthesis, surface energy, and photocatalytic activity

F Xu, P Zhang, A Navrotsky, ZY Yuan, TZ Ren… - Chemistry of …, 2007 - ACS Publications
We show an effective experimental method to prepare hierarchically porous zinc oxide
(ZnO) spherical nanoparticles through a self-assembly pathway using surface-modified …

Amorphous alumina nanoparticles: structure, surface energy, and thermodynamic phase stability

AH Tavakoli, PS Maram, SJ Widgeon… - The Journal of …, 2013 - ACS Publications
To provide a complete picture of the energy landscape of Al2O3 at the nanoscale, we
directed this study toward understanding the energetics of amorphous alumina (a-Al2O3). a …

Sintering and nanostability: the thermodynamic perspective

RHR Castro, D Gouvêa - Journal of the American Ceramic …, 2016 - Wiley Online Library
Sintering and nanostability (defined as the stability against sintering) are critical phenomena
present in the processing and application of nanoparticles. With important implications in …

Recrystallization of nanosized boehmite in an aqueous medium

IV Kozerozhets, GP Panasyuk, EA Semenov… - Powder Technology, 2023 - Elsevier
The formation and subsequent recrystallization of nanoboehmite under hydrothermal
treatment of γ-Al 2 O 3 nanopowder at a temperature of 150° C in a 1.5% HCl solution have …