Exploring the processing conditions to optimize the interface in 2-2 composites based on Pb(Zr,Ti)O-3 and NiFe2O4

Autor(es)

Santa Rosa, W. ^[1] ; Venet, M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys, Adv Funct Mat Lab, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 42, n. 7, p. 7980-7986, MAY 15 2016.
• Citações Web of Science: 0

Resumo

The processing of laminated composites based on lead zirconate titanate and nickel ferrite was investigated. Ceramic powders were prepared by solid-state reaction and sintered by conventional and hot pressing method, under different time and temperature conditions. As expected, it is found that differences in the grain size and thermal expansion coefficients between the constituent phases can cause a shear breaking of the material and excessive crack formation. Such problems were considerably reduced with the manufacture of several layers of particulate composites to create a stepwise crossover at the interface between both laminated phases. The results in this work show the way to obtain hot-pressed magnetoelectric composites with optimized interface, and they demonstrate that micro-cracks may lower the magnetoelectric effect by several orders of magnitude. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• Processo FAPESP: 13/00134-7 - Obtenção e aprimoramento das propriedades de compósitos magnetoelétricos livres de chumbo
• Beneficiário: Michel Venet Zambrano
• Modalidade de apoio: Auxílio à Pesquisa - Regular