A novel route to perovskite lead zirconate titanate from glycolate precursors via the sol-gel process

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

来源：Applied Organometallic Chemistry, 2008, 22(2): 104-113.

DOI：10.1002/aoc.1357

• lead zirconate titanate (PZT)
• lead glycolate precursor
• sodium tris (glycozirconate) precursor
• titanium glycolate precursor
• piezoelectric materials

A perovskite lead zirconate titanate was synthesized by the sol-gel process, using lead glycolate, sodium tris(glycozirconate) and titanium glycolate as the starting precursors. For the mole ratio Pb:Zr:Ti of 1:0.5:0.5 [Pb(Zr0.5Ti0.5)O-3], TGA-DSC thermal analysis indicated that the percentage of ceramic yield was 55.8, close to the calculated chemical composition value of 49.5. The exothermic peak occurred at 268 degrees C below the theoretical Curie temperature of 400 degrees C. The pyrolysis of Pb(Zr0.5Ti0.5)O-3 of the perovskite phase was investigated in terms of calcination temperature and time. The structure obtained was of the tetragonal form when calcined at temperatures below 400 degrees C; it transformed to the tetragonal and the cubic forms of the perovskite phase on calcination above the Curie temperature, as verified by X-ray data. The lead zirconate titanate synthesized and calcined at 400 degrees C for 1 h had the highest dielectric constant, the highest electrical conductivity and the dielectric loss tangent of 10 190, 0.803 x 10(-3) (Omega.m)(-1) and 1.513 at 1000 Hz, respectively. The lead zirconate titanate powder synthesized has potential applications as an electronic material.

• 出版日期2008-2