Attainment of lead titanate - Through the thermal decomposition of coprecipitated 8-hydroxyquinolinate precursors

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Date

2004-01-01

Advisor

Coadvisor

Graduate program

Undergraduate course

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Publisher

Kluwer Academic Publ

Type

Artigo

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Acesso restrito

Abstract

Crystalline PbTiO3 was obtained through the thermal decomposition of 8-hydroxyquinolinate of lead(II) and that of titanium(IV), which was monitored by TG/DTG/DTA under different atmospheric conditions and with varying heating rates. The compound was prepared from adding 8-hydroxyquinoline solution in the solution of metallic ions Pb(II):Ti(IV) (1:1) Linder constant stirring at 3degreesC, having the pH adjusted to 10. The results of these investigations show that different thermal behavior related to the precursor occurred and also the consequent formation of residues which have different crystallinities. No carbonate residues from the thermal decomposition could be determined by XRD and IR. Only PbTiO3 was observed and confirmed by DSC at 470degreesC, temperature lower than the tetragonal-cubic transition.

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Language

English

Citation

Journal of Thermal Analysis and Calorimetry. Dordrecht: Kluwer Academic Publ, v. 75, n. 2, p. 545-550, 2004.

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