Fabrication of PZT materials from nanostructured powders

✍ Scribed by N.S. Gajbhiye; Sanjay; P.S. Venkataramani

• Book ID: 104365071
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 302 KB
• Volume: 44
• Category: Article
• ISSN: 0960-8974
• DOI: 10.1016/s0960-8974(02)00008-6

✦ Synopsis

The nanostructured PbZra.szTie.4a03 powders (PZT) were prepared by urea hydrolysis and subsequent thermal treatment. Phase pure PZT is obtained after calcination of the gel at 873 K for 4h in air atmospher:. The XRD pattern showed the tetragonal symmetry with lattice parameters: a, = 3.97 A and c, = 4.15 A. The XRD crystallite size of the PZT material heat-treated at 873 K for 4h was 6.0 nm. TEM analysis showed that the powder consisted of small clusters of crystallites of 30 to 40 nm in size. PZT materials fired at 1373 K showed nearly 99% density with equiaxed grains of 2-3 pm. The good sinterability relatively at lower temperatures is thought to result from enhanced diffusivities in nanosized particles.