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Preparation and Electric Properties of Dense Nanocrystalline Zinc Oxide Ceramics
Author(s) -
Gao Lian,
Li Qiang,
Luan Weiling,
Kawaoka Hirokazu,
Sekino Tohru,
Niihara Koichi
Publication year - 2002
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.1151-2916.2002.tb00214.x
Subject(s) - nanocrystalline material , materials science , spark plasma sintering , ceramic , amorphous solid , grain boundary , sintering , zinc , mineralogy , composite material , metallurgy , nanotechnology , microstructure , crystallography , chemistry
This communication reports on the preparation and electric properties of dense nanocrystalline ZnO ceramics. By spark plasma sintering, nanocrystalline (∼100 nm) ZnO ceramics with a high density of 98.5% were obtained at a very low temperature of 550°C. Electric property measurement revealed a novel conduction nonlinearity in the sample sintered at 500°C. This phenomenon is due to the nanometerization of ZnO crystal and the grain boundary layer with an amorphous interfacial layer.