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Preparation and Characteristics of Bi 0.5 Na 0.5 TiO 3 Single‐Crystalline Films by a Solid‐State Process
Author(s) -
Ijuu Daiji,
Kimura Toshio,
Yamada Tomoaki,
Funakubo Hiroshi
Publication year - 2011
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.1551-2916.2011.04569.x
Subject(s) - materials science , substrate (aquarium) , layer (electronics) , composite number , epitaxy , crucible (geodemography) , evaporation , single crystal , composite material , chemical engineering , mineralogy , crystallography , chemistry , oceanography , computational chemistry , physics , engineering , thermodynamics , geology
A novel process was demonstrated for the preparation of an epitaxial Bi 0.5 Na 0.5 TiO 3 (BNT) single‐crystalline film on a SrTiO 3 single crystal substrate by simply heating a composite consisting of a BNT powder layer on the substrate. The BNT powder layer was formed on the substrate by spin coating and the composite was heated at 1150°C for several hours in a lidded crucible containing the BNT powder to avoid evaporation of Na and Bi from the composite. This yielded an epitaxial BNT single‐crystalline film several micrometers thick. The film had a high degree of orientation with the rocking curve full width at half maximum of 0.064°. The mechanism of film formation was found to be solid‐state spreading of BNT powder particles on the substrate, and a dense film was obtained from the porous powder layer.