Journal ArticleDOI
Intrinsic size dependence of the phase transformation temperature in zirconia microcrystals
R. C. Garvie,M. F. Goss +1 more
Reads0
Chats0
TLDR
In this article, it was argued that the tetragonal to monoclinic transformation in zirconia is exothermic, which guarantees that the surface free energy of the former is less than that of the latter structure.Abstract:
It is argued that because the tetragonal (t) to monoclinic (m) transformation in zirconia is exothermic, this guarantees that the surface free energy of the former is less than that of the latter structure. It is argued further that for pristine, unconstrained, single crystals,A
s ∼M
s ∼ 1447 K. It follows then, from a thermodynamic analysis that the reciprocal crystallite size is a linear function of the transformation temperature. Quantitative agreement was obtained between calculated and experimental crystallite size-temperature data which ranged over three orders of magnitude.read more
Citations
More filters
Journal ArticleDOI
Use of CeO2-based oxides in the three-way catalysis
TL;DR: In this paper, the use of CeO 2 -based materials in the automotive three-way catalysts (TWCs) is considered, and the multiple roles of COO 2 as a TWC promoter and in particular the oxygen storage/release capacity (OSC) are critically discussed.
Journal ArticleDOI
Crystallinity of inorganic films grown by atomic layer deposition: Overview and general trends
TL;DR: Puurunen et al. as discussed by the authors summarized the two-reactant ALD processes to grow inorganic materials developed to-date, updating the information of an earlier review on ALD.
Journal ArticleDOI
Nanostructured oxides in chemistry: characterization and properties.
Marcos Fernández-García,Arturo Martínez-Arias,Jonathan C. Hanson,José Antonio Lozano Rodríguez +3 more
Journal ArticleDOI
Dry reforming of methane: Influence of process parameters—A review
TL;DR: In this article, the authors explored the influences of the active metal, support, promoter, preparation methods, calcination temperature, reducing environment, particle size and reactor choice on catalytic activity and carbon deposition for the dry reforming of methane.
Journal ArticleDOI
Structural and Catalytic Characterization of Solid Acids Based on Zirconia Modified by Tungsten Oxide
TL;DR: In this article, the authors showed that the W centers are in a distorted octahedral oxygen environment, even after dehydration at 673 K, in all WOx-ZrO2samples (2-21 wt.% W) oxidized at 1073 K.
References
More filters
Journal ArticleDOI
Stability of Tetragonal ZrO2 Particles in Ceramic Matrices
TL;DR: In this paper, the stability of tetragonal ZrO2 particles in ceramic matrices was considered, with particular reference to Al2O3-ZrO 2 composites and to partially stabilized TZRO 2.
Journal ArticleDOI
Characterization and Stabilization of Metastable Tetragonal ZrO2
TL;DR: In this paper, single-domain and polydomain particles of tetragonal ZrO2 were prepared by hydrothermal and heat treatment of Zr O2·nH2O.
Journal ArticleDOI
Martensitic nucleation in ZrO2
I-W. Chen,Y-H. Chiao +1 more
TL;DR: In this paper, a small particle experiment to investigate the tetragonal to monoclinic ZrO 2 (martensitic) transformation was performed using a CuZrO2 model material prepared by internal oxidation.