Banca de DEFESA: MARIA DE FÁTIMA DANTAS E SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : MARIA DE FÁTIMA DANTAS E SILVA
DATA : 04/09/2017
HORA: 15:00
LOCAL: Auditório do NUPPRAR
TÍTULO:

PIGMENTS BASED ON SHALE AND IMPREGNATED WITH METALS FOR APPLICATION IN CERAMIC COATINGS.

PALAVRAS-CHAVES:

Shale, Inorganic pigments, Impregnation, Ceramic enamels.

PÁGINAS: 102
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

Most industries, the ceramic industry felt the need for the development of new pigments for the production of floors and coatings, in order to meet the demand of ceramics for the decoration of domestic and commercial environments. Given this, there is a great interest in developing new materials that are in accordance with environmental preservation and that are relatively low cost. Retried shale (XR) is a waste from the shale industry, which improperly stored or stored can cause damage to the environment and health. The objective of this study is to evaluate the viability of this material, pure retort shale and retorted shale impregnated with metals, in obtaining pigments that stably color several ceramic matrices; Trying to understand which parameters influence the pigmentation of the enamels. The XR-based pigments were prepared by impregnating the metals via wet and calcined at 700 and 900°C. These pigments were characterized by X-Ray Fluorescence (FRX), X-ray Diffraction (XRD), Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) spectroscopy in UV-Visible region and Colorimetry. The results confirm the feasibility of the use of shale as a pigment indicating that the use of XR and XR impregnated with iron and chromium nitrate have been favorable processes since they have the advantage of being simple, low cost and reduces the environmental impact caused for this waste. The pigments have light brown, red and shades of gray according to the impregnation and their calcination temperatures, which have become darker at higher temperature.

MEMBROS DA BANCA:
Presidente - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Interno - 1300987 - CARLOS ALBERTO PASKOCIMAS
Externo à Instituição - ASENETE FRUTUOSO DA COSTA - UFRN
Externo à Instituição - JOANA MARIA DE FARIAS BARROS - UFPB
Externo à Instituição - PATRICIA MENDONCA PIMENTEL - UFERSA