Banca de QUALIFICAÇÃO: JULIANE GERMANO DE SOUZA GONDIM

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JULIANE GERMANO DE SOUZA GONDIM
DATA : 11/04/2018
HORA: 09:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

Study of Luminescent Properties of Calcium Aluminate Doped With Europium III Synthesized by Sol-Gel Method.

PALAVRAS-CHAVES:

Calcium aluminate, europium, photoluminescent, Sol-Gel method, 1, 4-butanediol.

PÁGINAS: 64
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
RESUMO:

Luminescent materials have been widely applied in many areas, such as illumination, movies, artificial fibers, painting, optical markers and others. Among luminous materials, aluminates have been showed its quality, even more when they are doped or codoped with rare soil, due to its great chemical and thermal stability, not forgetting its lasting photoluminescent property. In this paper, structural and optical behaviors of calcium aluminate doped with europium III (Ca_1-xEu_xAl₂O₄ with x = 0%, 1%, 2% and 4% mole) were studied. The formulations were synthesized through sol-gel method and calcined at 1300°C and 1500°C, with fractions of deionized water and 1, 4-butanediol (diol) on its medium of reaction. Those parameters affected the crystalline structure, and the photocatalytic and luminescent properties of each sample. The results show an increase of luminescence when there is a single phase. It only happens on samples synthesized with the highest temperature. Moreover, it was seen that the diol increase promoted an increase of both photoluminescence and doped concentration.

MEMBROS DA BANCA:
Interno - 1300987 - CARLOS ALBERTO PASKOCIMAS
Externo ao Programa - 1718775 - KALINE MELO DE SOUTO VIANA
Presidente - 1883170 - MAURICIO ROBERTO BOMIO DELMONTE