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Previous issue date: 2015-02-23 / O presente estudo tem como objetivo avaliar a potencialidade da utiliza??o das
cinzas do baga?o da cana-de-a??car (CBC) como fundente, em substitui??o ao filito
e/ou ao feldspato na massa padr?o para produ??o industrial de porcelanato
esmaltado, verificando a possibilidade de as CBC contribu?rem para a redu??o do
coeficiente de expans?o t?rmica global da massa cer?mica. Para isso, como um
resultado da pesquisa, foram caracterizadas as mat?rias-primas componentes da
massa padr?o (argila, filito, caulim, feldspato, quartzo e talco) e o res?duo das CBC,
por meio de ensaios por FRX, DRX, AG, ATD e ATG. Foram confeccionados corpos
de prova (CDP) nas dimens?es de 100 mm x 50 mm x 8 mm em matriz uniaxial,
sob press?o de compacta??o de 33 MPa, reunidos em lotes de 3 unidades,
posteriormente sinterizados nas temperaturas de 1150 ?C ? 1210 ?C variando a
escala de avalia??o em 10 ?C, rampa de aquecimento e resfriamento de 50 ?C/min e
25 ?C/min, com tempo de patamares de 1 min, 3 min, 5 min, 8 min, 10 min, 15
min, 30 min e 60 min., analisando os resultados das propriedades f?sicas de
absor??o de ?gua (AA), retra??o linear de queima (RLq), an?lise dilatom?trica
(ADT), tens?o de resist?ncia ? flex?o (TRF) e MEV dos corpos sinterizados, a fim de
verificar a adequa??o dos CDP ?s normas ISO 13006, ISO 10545, NBR 13816; NBR
13817 e NBR 13818. O estudo mostrou que as formula??es que mais atendem aos
requisitos das normas s?o: a G4 ? na qual se aplicou 10% de CBC em substitui??o
ao filito, temperatura de sinteriza??o de 1210 ?C e tempo de patamar de 10 min., e
F3 ? com aplica??o de 7,5% de CBC em substitui??o ao feldspato, nas temperaturas
de sinteriza??o de 1190 ?C, 1200 ?C e 1210 ?C e tempo de patamar de 10 min.
Essas formula??es apresentaram melhor desempenho quanto ? forma??o de
cristais de mulita, com redu??o consider?vel de trincas e poros, atendendo aos pr?-
requisitos das normas para porcelanato esmaltado. A an?lise dos resultados
comprova que a utiliza??o da CBC como fundente na prepara??o de massa para
porcelanato atende aos par?metros normalizados para fabrica??o desse produto, e,
com isso, pode-se reduzir o impacto ambiental e o custo de produ??o. Portanto, ?
recomendada a utiliza??o desse res?duo na ind?stria ceramista, por conta de sua
viabilidade industrial, comercial e colaborativa para a sustentabilidade. / The present study aims to evaluate the potential use of bagasse ash from sugar cane
(CBC) as a flux, replacing phyllite and/or feldspar in standard industrial mass
production of enameled porcelain, verifying the possibility of the CBC contribute to
the overall reduction of the coefficient of thermal expansion of the ceramic mass. To
this end, as a result of the research, we characterized the raw material components
of the standard mass (clay, phyllite, kaolin, feldspar, quartz and talc) and the residue
of BCC, by testing by XRF, XRD, AG, DTA and ATG. Specimens (CDP) were
manufactured in the dimensions of 100 mm x 50 mm x 8 mm in uniaxial matrix under
compaction pressure of 33 MPa, assembled in batches of 3 units subsequently
sintered at temperatures of 1150?C to 1210?C by varying the Rating Scale at 10?C,
heating and cooling ramp of 50?C/min and 25?C/min, with levels of 1 min, 3 min, 5
min, 8 min, 10 min, 15 min, 30 min and 60 min. analyzing the results of the physical
properties of water absorption (WA), linear firing shrinkage (LFS), dilatometric
analysis (DTA), flexural strain (SFT) and SEM of the sintered bodies in order to verify
the adequacy of CDP to ISO 13006, ISO 10545, NBR 13816 standards; NBR 13817
and NBR 13818. The study showed that the formulations that best suit the
requirements of the standards are:. G4 - which was applied in 10% of replacing the
CBC phyllite, sintering temperature 1210 ? C for 10 min and porch, and F3 - with
application of 7.5% of CBC to replace the feldspar in the sintering temperatures of
1190?C, 1200?C and 1210?C for 10 min and porch. These formulations showed
better performance regarding the formation of primary and secondary mullite, with
considerable reduction of cracks and pores, meeting the prerequisites of standards
for glazed porcelain. The results shows that the use of the CBC as a flux in the
preparation of porcelain mass meets standard parameters for the manufacture of the
product, and thereby can reduce environmental impact and the cost of production.
Therefore, it is recommended to use this residue in the ceramics industry, due to its
industrial, commercial and collaborative viability for sustainability.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19889 |
| Date | 23 February 2015 |
| Creators | Paranhos, Raimundo Jorge Santos |
| Contributors | 50580396720, http://lattes.cnpq.br/5460040602567184, Peres, Ana Paula da Silva, 05724168499, http://lattes.cnpq.br/9975840346577976, Ramalho, Eduardo Galv?o, 03605359418, http://lattes.cnpq.br/3006037569302325, Dultra, Eduardo Jorge Vidal, 02551707692, http://lattes.cnpq.br/2132307633780425, Silva, Vamberto Monteiro da, 67456863415, http://lattes.cnpq.br/7962325767490100, Acchar, Wilson |
| Publisher | Universidade Federal do Rio Grande do Norte, 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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