NDLI: Influence of different heat treatment programs on properties of sol–gel synthesized (Na$_{0·5}$K$_{0·5}$)NbO$

Content Provider	Springer Nature Link
Copyright Year	2012
Abstract	Thin films of (Na$_{0·5}$K$_{0·5}$)NbO$_{3}$ (KNN) were synthesized on Pt/Ti/SiO$_{2}$/Si substrates with repeated spin-coating after fabrication of the precursor solution by a sol–gel process. The KNN precursor solution was prepared from K- and Na-acetate, Nb-pentaethoxide and 1,3-propanediol. Based on three characteristic temperatures derived from thermal analysis (TG–DTA) experiments, five heat treatment programs were developed. All programs lead to single phase perovskite KNN films with random crystal orientation, but only the programs that included a treatment after each single spin-coating step provided pore free surfaces with grains of about 100 nm size. The lowest leakage current at 150 kV cm$^{ − 1}$ was obtained for the temperature program that included pyrolysis and calcination steps after each deposited layer.
Starting Page	745
Ending Page	750
Page Count	6
File Format	PDF
ISSN	02504707
Journal	Bulletin of Materials Science
Volume Number	35
Issue Number	5
e-ISSN	09737669
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-10-20
Publisher Institution	Indian Academy of Sciences
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sol–gel ferroelectric electrical properties thin film perovskite lead-free Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science

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Influence of different heat treatment programs on properties of sol–gel synthesized (Na$_{0·5}$K$_{0·5}$)NbO$_{3}$ (KNN) thin films