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.
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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 -