Banca de QUALIFICAÇÃO: HUGO PLÍNIO DE ANDRADE ALVES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : HUGO PLÍNIO DE ANDRADE ALVES
DATA : 15/04/2019
HORA: 09:00
LOCAL: Sala G4 - Setor de Aulas IV
TÍTULO:

Structural, magnetic and electrical properties of ZrO2 tape incorporated with magnetic particles

PALAVRAS-CHAVES:

zirconia, magnetic particles, microwave assisted combustion method, tape casting, magnetic measurements, electrical measurements.

PÁGINAS: 96
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

The ceramic zirconia (ZrO2) tapes stabilized with yttrium (Y2O3) oxide incorporated with magnetic particles drastically improve its electrical and magnetic properties, once the particles possess permanent magnetic moments, optimizing these properties of the ceramic tapes. In this paper, it was possible to produce ceramic zirconia (ZrO2) tapes stabilized with yttrium (Y2O3) oxide incorporated with magnetic particles produced by microwave assisted combustion techniques and tape casting, being systematically analyzed. The green and sintered magnetic tapes were characterized by Thermogravimetric Analysis (TGA), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and magnetic and electrical measurements. It was possible to investigate the changes in structural, magnetic and electrical properties after the sintering process, discussing the connections between them. The magnetic properties were performed on a wide range of external magnetic field and temperature. The magnetite phase of the magnetic particles dominated the magnetic and electrical properties of the green tape. However, for the sintered tape, the increase in the hematite phase led to remarkable changes both in the magnetic and electrical properties. The electrical characterization reflects the changes observed in the structural properties after the sintering process. Furthermore, the main advantage of the ceramic tape incorporated with magnetic particles lies in the possibility of producing slim and functional ceramic materials, easily moldable for application in electronic and magnetic devices.

MEMBROS DA BANCA:
Externa à Instituição - Ana Paula da Silva Peres - UFRN
Externo à Instituição - Antonio Carlos Silva da Costa - UFRN
Interno - 1474380 - MARCIO ASSOLIN CORREA
Presidente - 1149564 - WILSON ACCHAR