Grain growth kinetics and electrical properties of lanthanum modified lead zirconate titanate (9/65/35) based ferroelectric ceramics

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3063693· OSTI ID:21185960

Roca, R Alvarez; Guerrero, F ^[1]; Botero, E R; Garcia, D; Eiras, J A ^[1]; Guerra, J D. S. ^[2]

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1. Departamento de Fisica, Grupo de Ceramicas Ferroeletricas, UFSCar, Rod. Washington Luis, Km 235, CEP 13565-905 Sao Carlos, Sao Paulo (Brazil)
2. Grupo de Ferroeletricos e Materiais Multifuncionais, Instituto de Fisica, Universidade Federal de Uberlandia, 38400-902 Uberlandia, Minas Gerais (Brazil)

The influence of the microstructural characteristics on the dielectric and electrical properties has been investigated for Nd{sup 3+} doped lanthanum modified lead zirconate titanate ferroelectric ceramics, obtained by the conventional solid-state reaction method, by taking into account different sintering conditions. The grain growth mechanism has been investigated and a cubic-type grain growth law was observed for samples with grain size varying from 1.00 up to 2.35 {mu}m. The porosity and grain size dependences of the phase transition parameters, such as the maximum dielectric permittivity and its corresponding temperature ({epsilon}{sub m} and T{sub m}, respectively) were also investigated. The ac conductivity analyses followed the universal Jonscher law. The behavior of the frequency exponent (s) was analyzed through the correlated barrier hopping model. Both ac and dc conductivity results have been correlated with the observed microstructural features.

• OSTI ID: 21185960
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 105; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FERROELECTRIC MATERIALS
GRAIN GROWTH
GRAIN SIZE
LANTHANUM
LANTHANUM COMPOUNDS
NEODYMIUM IONS
PERMITTIVITY
PHASE TRANSFORMATIONS
POROSITY
PZT
SINTERING