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TEM Examination of Heart‐Treated Nanocrystalline ZnS
Author(s) -
Voiles E. Todd,
Chumbley L. Scott,
Han Yong,
Akinc Mufit
Publication year - 1994
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.1151-2916.1994.tb04584.x
Subject(s) - nanocrystalline material , materials science , substructure , transmission electron microscopy , nanoporous , nanocrystal , economies of agglomeration , chemical engineering , sintering , dispersity , morphology (biology) , grain size , particle (ecology) , nanotechnology , mineralogy , metallurgy , chemistry , structural engineering , biology , polymer chemistry , engineering , genetics , oceanography , geology
Monodisperse, spherical, submicrometer‐size ZnS particles with nanocrystalline substructure were heated and examined in situ using a Gatan hot stage and a transmission electron microscope (TEM) at temperatures ranging from 500° to 900°C. The goal of this study was to observe the micro‐structural changes that occur in these particles during heat treatment. The particles, whose morphology consists of an agglomeration of nanocrystals, showed significant grain growth and sintering at temperatures as low as 600°C, much lower than expected for bulk ZnS crystals. In addition, the particles were seen to develop hollow cores during heat treatment. This hollowing effect appears to be related to the nanocrystalline/nanoporous nature of the particles.