Low temperature synthesis of ultrafine Pb(Zr,Ti)O{sub 3} powder by sol-gel combustion
- Max-Planck-Institut fuer Metallforschung, Pulvermetallurgisches Laboratorium und Institut fuer Nichtmetallische Anorganische Materialien, Universitaet Stuttgart, Heisenbergstrasse 5, 70569 Stuttgart (Germany)
Lead zirconate titanate powders are derived from a novel aqueous-based citrate-nitrate/oxynitrate sol-gel combustion process. Aqueous solutions of metal nitrates or oxynitrates are transformed into gels with citric acid under heating. The received gels undergo a self-propagating combustion reaction on heating to 180{degree}C and subsequently yield voluminous ashes. These ashes form single phase perovskite Pb(Zr{sub 0.53}Ti{sub 0.47})O{sub 3} powder with a specific surface area of 8m{sup 2}/g upon calcination at 550{degree}C. The ashes show a homogeneous distribution of lead, zirconium, and titanium ions which guarantees short diffusion paths in solid state formation of PZT perovskite. The redox behavior of the gels was studied with the help of DTA experiments. Powders are characterized in terms of XRD, SEM, and EDX analysis. {copyright} {ital 1997 Materials Research Society.}
- OSTI ID:
- 554337
- Journal Information:
- Journal of Materials Research, Vol. 12, Issue 10; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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