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Sintering of Sol—Gel‐Prepared Submicrometer Particles Studied by Transmission Electron Microscopy
Author(s) -
Chu Xi,
Chung Wonil,
Schmidt Lanny D.
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb08344.x
Subject(s) - transmission electron microscopy , materials science , sintering , dispersity , crystallization , chemical engineering , particle size , microstructure , particle (ecology) , grain size , scanning electron microscope , grain growth , porosity , electron microscope , sol gel , mineralogy , composite material , nanotechnology , chemistry , optics , polymer chemistry , oceanography , physics , geology , engineering
We studied the sintering process of sol‐gel‐prepared monodisperse submicrometer CeO 2 spheres by examining the microstructural changes of single spherical particles after successive heat treatment in oxygen up to 850°C using transmission electron microscopy. Steps of organic phase removal, CeO 2 crystallization, grain growth, and particle condensation were clearly illustrated. Grain‐size and sphere‐diameter changes were measured quantitatively using this technique. CeO 2 particles were found to be highly porous until collapse, which occurred at~850°C.