Hrtem study of the surface and bulk of nickel oxide: Influence of annealing and quenching

Wilder Carrillo-Cabrera; David Smith

doi:10.1016/0167-2738(89)90354-8

Hrtem study of the surface and bulk of nickel oxide: Influence of annealing and quenching

Wilder Carrillo-Cabrera
, David Smith

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Changes in the surface and bulk structure of a commercial NiO powder, as produced by annealing/quenching treatments, have been charateerized by high resolution electron microscopy, especially by means of the surface profile imaging technique. Particles of the as-received NiO exhibited macroscopically round surfaces with atomic steps and also {111} micro-facets forming a "hill and valley" structure. Larger macro-facetted particles with (100), (110) and (111) faces were grown by annealing at T=1360°C. Thin amorphous near-surface layers appeared during cooling in an air flux from T≤1360°C. Phase transformation to a defect-spinel oxygen-rich phase can be induced by quenching in air from 1600°C whereas small precipitates are produced in the subsurface region and in the bulk by water quenching from the same temperature.

Original language	English (US)
Pages (from-to)	749-758
Number of pages	10
Journal	Solid State Ionics
Volume	32-33
Issue number	PART 2
DOIs	https://doi.org/10.1016/0167-2738(89)90354-8
State	Published - 1989

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/0167-2738(89)90354-8

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@article{eeed280a234f4a9c92f620111fee22e8,

title = "Hrtem study of the surface and bulk of nickel oxide: Influence of annealing and quenching",

abstract = "Changes in the surface and bulk structure of a commercial NiO powder, as produced by annealing/quenching treatments, have been charateerized by high resolution electron microscopy, especially by means of the surface profile imaging technique. Particles of the as-received NiO exhibited macroscopically round surfaces with atomic steps and also \{111\} micro-facets forming a {"}hill and valley{"} structure. Larger macro-facetted particles with (100), (110) and (111) faces were grown by annealing at T=1360°C. Thin amorphous near-surface layers appeared during cooling in an air flux from T≤1360°C. Phase transformation to a defect-spinel oxygen-rich phase can be induced by quenching in air from 1600°C whereas small precipitates are produced in the subsurface region and in the bulk by water quenching from the same temperature.",

author = "Wilder Carrillo-Cabrera and David Smith",

note = "Funding Information: This research was supported by the National Science Foundation (NSF) under Grant DMR-8502504 and utilized the resources of the Facility for High Resolution Electron Microscopy supported by the NSF Division of Materials Research (Grant DMR-8306501 ).",

year = "1989",

doi = "10.1016/0167-2738(89)90354-8",

language = "English (US)",

volume = "32-33",

pages = "749--758",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "PART 2",

}

TY - JOUR

T1 - Hrtem study of the surface and bulk of nickel oxide

T2 - Influence of annealing and quenching

AU - Carrillo-Cabrera, Wilder

AU - Smith, David

N1 - Funding Information: This research was supported by the National Science Foundation (NSF) under Grant DMR-8502504 and utilized the resources of the Facility for High Resolution Electron Microscopy supported by the NSF Division of Materials Research (Grant DMR-8306501 ).

PY - 1989

Y1 - 1989

N2 - Changes in the surface and bulk structure of a commercial NiO powder, as produced by annealing/quenching treatments, have been charateerized by high resolution electron microscopy, especially by means of the surface profile imaging technique. Particles of the as-received NiO exhibited macroscopically round surfaces with atomic steps and also {111} micro-facets forming a "hill and valley" structure. Larger macro-facetted particles with (100), (110) and (111) faces were grown by annealing at T=1360°C. Thin amorphous near-surface layers appeared during cooling in an air flux from T≤1360°C. Phase transformation to a defect-spinel oxygen-rich phase can be induced by quenching in air from 1600°C whereas small precipitates are produced in the subsurface region and in the bulk by water quenching from the same temperature.

AB - Changes in the surface and bulk structure of a commercial NiO powder, as produced by annealing/quenching treatments, have been charateerized by high resolution electron microscopy, especially by means of the surface profile imaging technique. Particles of the as-received NiO exhibited macroscopically round surfaces with atomic steps and also {111} micro-facets forming a "hill and valley" structure. Larger macro-facetted particles with (100), (110) and (111) faces were grown by annealing at T=1360°C. Thin amorphous near-surface layers appeared during cooling in an air flux from T≤1360°C. Phase transformation to a defect-spinel oxygen-rich phase can be induced by quenching in air from 1600°C whereas small precipitates are produced in the subsurface region and in the bulk by water quenching from the same temperature.

UR - https://www.scopus.com/pages/publications/0024613274

UR - https://www.scopus.com/pages/publications/0024613274#tab=citedBy

U2 - 10.1016/0167-2738(89)90354-8

DO - 10.1016/0167-2738(89)90354-8

M3 - Article

AN - SCOPUS:0024613274

SN - 0167-2738

VL - 32-33

SP - 749

EP - 758

JO - Solid State Ionics

JF - Solid State Ionics

IS - PART 2

ER -

Hrtem study of the surface and bulk of nickel oxide: Influence of annealing and quenching

Abstract

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