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Previous issue date: 2017-09-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Assim como a maioria dos setores industriais, o setor cer?mico tamb?m sentiu a
necessidade de desenvolvimento. Desta forma, a ind?stria cer?mica vem buscando cada
vez mais novos pigmentos para a produ??o de pisos e revestimentos, visando atender a
demanda de cer?micas para decora??o de ambientes, tanto dom?sticos quanto
comerciais. Al?m disso, h? um grande interesse em desenvolver novos materiais que
estejam de acordo com a preserva??o ambiental e que tamb?m sejam relativamente de
baixo custo. O xisto retortado (XR) ? um rejeito proveniente da ind?stria do xisto que,
armazenado de forma inadequada, pode causar danos ? sa?de e ao meio ambiente.O
objetivo deste estudo ? avaliar a viabilidade desse material, xisto retortado puro e xisto
retortado impregnado com metais, na obten??o de pigmentos que colorem, de forma
est?vel, diversas matrizes cer?micas; tentando compreender quais par?metros
influenciam na pigmenta??o dos esmaltes. Os pigmentos a base de XR foram
preparados impregnando os metais por via ?mida e calcinados a 700 e 900?C. Em
seguida foram caracterizados por Fluoresc?ncia de Raio X (FRX) An?lise
termogravim?trica (Tg), Difra??o de raios X (DRX), Espectroscopia na regi?o do
Infravermelho (FTIR), Microscopia eletr?nica de varredura (MEV/EED),
Espectroscopia na regi?o do UV-Vis?vel e Colorimetria. Os resultados confirmam a
viabilidade do uso do xisto como pigmento cer?mico al?m de ser obtido por um m?todo
simples, o pigmento ? de baixo custo e reduz o impacto ambiental causado por esse
rejeito. Os pigmentos possuem tonalidades marrom claro, vermelha e tons de cinza de
acordo com a impregna??o e suas temperaturas de calcina??o, que se tornaram mais
escuras em maior temperatura. / Like most of the industries sectors, the ceramic sector also felt the need of developing.
In this way, the ceramic industry has been seeking to create more and more pigments for
the production of floors and coatings, aiming to meet the demand of ceramics for the
decoration of domestic and commercial environments. In addition to that, there is a
great interest in developing new materials that are in accordance with the environmental
preservation that are also relatively low-cost. Retorted shale (RS) is a waste from the
shale industry that may harm health and the environment if improperly stored. The aim
of this study is to evaluate the viability of the materials, pure RS and metal-impregnated
RS, to obtain pigments that are stable in several ceramic matrices, as well as to try to
understand which parameters influence the pigmentation of the enamels. The RS-based
pigments were prepared by wet impregnating of the metals and calcined at 700 and
900?C. After that, the materials were characterized by X-ray Fluorescence (XRF),
Thermogravimetric analysis (Tg), X-ray diffraction (XRD), Fourier-Transform Infrared
Spectroscopy (FTIR), Scanning Electron Microscopy (SEM /EDS), UV-Visible
Spectroscopy and Colorimetry. The results confirm the feasibility of using RS as a
ceramic pigment obtained by a simple method, low-cost and that reduces the
environmental impacts caused by such waste. The pigments are light brown, red and
shades of gray, according to the impregnation and calcination temperatures, which get
darker at higher temperatures.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24352 |
| Date | 01 September 2017 |
| Creators | Silva, Maria de F?tima Dantas e |
| Contributors | 04514998320, Paskocimas, Carlos Alberto, 06296687877, Costa, Asenete Frutuoso da, 01230032452, Barros, Joana Maria de Farias, 85239658404, Pimentel, Patricia Mendon?a, 77858239449, Melo, Marcus Antonio de Freitas |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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