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Synthesis of Pure, Crystalline (Ba,Sr)TiO 3 Nanosized Powders in Radio Frequency Induction Thermal Plasma
Author(s) -
Kobayashi Norio,
Ishigaki Takamasa,
Watanabe Takayuki,
Li JiGuang
Publication year - 2011
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2010.02546.x
Subject(s) - materials science , strontium , barium , inorganic chemistry , titanium , nuclear chemistry , strontium titanate , metallurgy , nanotechnology , organic chemistry , thin film , chemistry
Barium strontium titanate ((Ba,Sr)TiO 3 ) nanosized powders were synthesized via spray pyrolysis of a liquid precursor mist in Ar–O 2 radio frequency induction thermal plasma. To adjust the cation stoichiometry of the complex oxide, liquid precursors were prepared by mixing titanium butoxide (Ti(OBu) 4 ) stabilized with diethanolamine and aqueous solutions of barium nitrate (Ba(NO 3 ) 2 ) and strontium nitrate (Sr(NO 3 ) 2 ) stabilized with citric acid. The molar ratios of titanium, barium, and strontium ions (Ba/(Ba+Sr) and (Ba+Sr)/Ti ratios) in the liquid precursor were varied. Pure, high‐crystalline (Ba,Sr)TiO 3 (Ba/(Ba+Sr)=0.0–1.0) powders of ∼45 nm in size were synthesized in this one‐step process.