Lanthanum-doped PZT synthesized by the oxidant peroxide method and sintered by conventional and microwave routes

Autor(es)

Goncalves, Mayra D. ; Camargo, Emerson R.

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 43, n. 3, p. 3004-3009, FEB 15 2017.
• Citações Web of Science: 3

Resumo

Lanthanum-doped lead zirconate titanate (Pb0.95La0.05Zr1-xTixO3) with two different compositions, x=0.20 (PLZT20) and 0.80 (PLZT80), were successfully obtained by the oxidant peroxide method (OPM). This environmental friendly synthetic route showed to be very attractive to prepare lead based ferroelectric powders since no carbon or halides compounds were used. Tetragonal perovskite structure was observed for PLZT80 and rhombohedral perovskite for PLZT20, with single phase identified in the powders calcined at temperatures higher than 700 degrees C. Powders crystallized at 700 degrees C were used to produce ceramic samples that were sintered at 1000 degrees C for 2 h by conventional and microwaves techniques. The composition of the fractured surface of ceramics were quite close to the nominal molar composition, indicating that the OPM promotes the formation of materials with high compositional homogeneity and similar microstructures regardless the sintering method used. (AU)

• Processo FAPESP: 09/01587-0 - Perovskitas baseadas no PZT modificadas com terras raras sintetizadas usando o método dos complexos oxidantes de peróxido (OPM) e caracterizadas com uso complementar de espectroscopia Raman, difração de raios-X e microscopia eletrônica.
• Beneficiário: Mayra Dancini Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 07/50904-2 - Perovskitas baseadas no titanato de chumbo modificadas com terras raras sintetizadas usando o método dos complexos oxidantes de peróxido (OPM - the oxidant-peroxide method) e caracterizadas com uso complementar de espectroscopia Raman, infravermelho e difração de raios X
• Beneficiário: Alexandre Henrique Pinto
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica