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

Author(s)

Goncalves, Mayra D. ; Camargo, Emerson R.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 43, n. 3, p. 3004-3009, FEB 15 2017.
• Web of Science Citations: 3

Abstract

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)

• FAPESP's process: 09/01587-0 - Synthesis by means of the OPM route of PZT perovskites modified with rare-earth and their characterization using Raman, X ray diffraction and electronic microscopies.
• Grantee: Mayra Dancini Gonçalves
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC