Premium
A novel route to perovskite lead zirconate from lead glycolate and sodium tris(glycozirconate) via the sol–gel process
Author(s) -
Tangboriboon N.,
Jamieson A.,
Sirivat A.,
Wongkasemjit S.
Publication year - 2007
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1303
Subject(s) - zirconate , chemistry , perovskite (structure) , orthorhombic crystal system , monoclinic crystal system , calcination , dielectric , curie temperature , lead zirconate titanate , analytical chemistry (journal) , mineralogy , inorganic chemistry , ceramic , crystal structure , crystallography , materials science , ferroelectricity , organic chemistry , ferromagnetism , catalysis , physics , optoelectronics , quantum mechanics , titanate
A perovskite lead zirconate was synthesized, using lead glycolate and sodium tris (glycozirconate) as the starting precursors, by the sol–gel process. The obtained molar ratio Pb:Zr of PbZrO 3 was 0.9805:1. The TGA–DSC characterizations indicated that the percentage of ceramic yield was 56.4, close to the calculated chemical composition of 59.6. The exothermic peak occurred at 245.7 °C, close to the theoretical Curie temperature of 230 °C. The pyrolysis of PbZrO 3 of the perovskite phase was investigated in terms of calcination temperature and time. The structure obtained was the orthorhombic form when calcined at low temperature at 300 °C for 1 h; it transformed to the monoclinic and cubic forms of the perovskite phase at higher temperatures above the Curie temperature as verified by X‐ray data. The lead zirconate synthesized and calcined at 300 °C for 1 h has the highest dielectric constant, the highest electrical conductivity and the dielectric loss tangent of 2267, 3.058 × 10 −4 (Ω m) −1 and 2.484 at 1000 Hz, respectively. The lead zirconate powder produced has potential applications as materials used in microelectronics and microelectromechanical systems. Copyright © 2007 John Wiley & Sons, Ltd.