A novel route to perovskite lead zirconate from lead glycolate and sodium tris(glycozirconate) via the sol-gel process

作者：Tangboriboon N; Jamieson A; Sirivat A; Wongkasemjit S^*

来源：Applied Organometallic Chemistry, 2007, 21(10): 849-857.

DOI：10.1002/aoc.1303

• lead zirconate
• lead glycolate precursor
• sodium tris (glycozirconate) precursor
• anti-ferroelectric and pyroelectric materials

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 PbZrO3 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 degrees C, close to the theoretical Curie temperature of 230 degrees C. The pyrolysis of PbZrO3 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 degrees 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 degrees C for 1 h has the highest dielectric constant, the highest electrical conductivity and the dielectric loss tangent of 2267,3.058 x 10(-4) (Omega 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.

• 出版日期2007-10