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Electroceramics from Source Materials via Molecular Intermediates: BaTiO 3 from TiO 2 via (Ti(catecholate) 3 ) 2‐
Author(s) -
Davies Julian A.,
Dutremez Sylvain
Publication year - 1990
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.1151-2916.1990.tb05218.x
Subject(s) - calcination , catechol , anatase , rutile , materials science , x ray crystallography , reaction intermediate , titanate , inorganic chemistry , crystallography , chemistry , catalysis , photocatalysis , organic chemistry , diffraction , physics , optics , composite material , ceramic
Rutile or anatase may be depolymerized and complexed by sequential treatment with (i) H 2 SO 4 /(NH 4 ) 2 SO 4 , (ii) H 2 O, and (iii) catechol/NH 4 OH to produce the intermediate (NH 4 ) 2 (Ti(catecholate) 3 ) · 2H 2 O. Treatment with Ba(OH) 2 · 8H 2 O leads to an acid‐base reaction generating Ba(Ti(catecholate) 3 ) · 3H 2 O, in which the Ba:Ti ratio is held at 1:1 at the molecular level. Calcination produces BaTiO 3 powder.