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Previous issue date: 2013-07-23 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The power industry generates as waste ceramic bodies of electrical fuses that are discarded after use. The formulation of ceramic bodies for porcelain electrical insulators using waste from the bodies fuse allocation promotes environmentally appropriate, through the reuse of the material. This work evaluated the technical feasibility of using waste for use in electrical porcelains with formulations containing the residue, feldspar and kaolinite. The raw materials were processed through grinding and sieving to 200 mesh. The ceramic material obtained from the proposed formulations with 25%, 30%, 34% and 40% of the residue went through a vibratory mill for grinding and homogenization, and then were sieved at 325 mesh. The samples were shaped in a uniaxial press, with the application of 25 MPa and sintered at 1100? C, 1150?C, 1200?C, 1225?C and 1250?C, at levels of 20 and 45 minutes. Were also developed bodies of evidence with reference formulations obtained without residue, to establish a comparison on physical, mechanical and electrical. The tests were conducted and technology: linear shrinkage, porosity, water absorption, resistance to bending to three points, measuring insulation resistance electrical resistivity of the material, X-ray diffraction and X-ray fluorescence Waste characterizations pointed to the existence of two phases: mullite and quartz phases are of great importance in the microstructure of the ceramic and this fact reveals a possibility for reuse in electrical porcelains. The mullite is an important constituent because it is a phase that makes it possible to increase the mechanical strength in addition to the body allows the use at high temperatures. The use of ceramic bodies residue fuses, proved feasible for application in electrical porcelain and the most significant results were obtained by the formulations with 25% waste and sintering at 1200?C / O setor el?trico gera como res?duo os corpos cer?micos de fus?veis el?tricos que s?o descartados ap?s o uso. A formula??o de massas cer?micas para porcelanas el?tricas utilizando res?duos oriundos de corpos de fus?veis promove uma destina??o ambiental adequada, por meio do reaproveitamento do material. Neste trabalho foi avaliada a viabilidade t?cnica da utiliza??o do res?duo para a aplica??o em porcelanas el?tricas com formula??es contendo o res?duo, feldspato e argila caulin?tica. As mat?rias primas foram processadas passando por moagem e peneiramento a 200 Mesh. As massas cer?micas obtidas a partir das formula??es propostas com 25%, 30%, 34% e 40% do res?duo passaram por um moinho vibrat?rio para homogeneiza??o e moagem e depois foram peneiradas a 325 Mesh. Os corpos de prova foram conformados em uma prensa uniaxial, com aplica??o de 25 Mpa e sinterizados a 1100?C, 1150?C, 1200?C, 1225?C e 1250?C, com patamares de 20 e 45 minutos. Foram desenvolvidos tamb?m corpos de provas com formula??es de refer?ncia obtidas sem o res?duo, para estabelecer um comparativo na caracteriza??o f?sica, mec?nica e el?trica. Os ensaios e tecnol?gicos realizados foram: retra??o linear, porosidade, absor??o de ?gua, resist?ncia a flex?o a tr?s pontos, medi??o de resist?ncia de isola??o el?trica, resistividade do material, difra??o de raios X e fluoresc?ncia de raios X. A caracteriza??o do res?duo apontou para a exist?ncia de duas fases: mulita e quartzo, que s?o fases de grande import?ncia na microestrutura do material cer?mico e esse fato revela uma possibilidade para o reaproveitamento em porcelanas el?tricas. A mulita ? um importante constituinte pois ? uma fase que possibilita a eleva??o da resist?ncia mec?nica al?m de permite a utiliza??o do corpo em elevadas temperaturas. O uso do res?duo cer?micos dos corpos de fus?veis, se mostrou vi?vel para a aplica??o em porcelanas el?tricas e os resultados mais significativos foram obtidos pelas formula??es com 25% de res?duo e sinteriza??o a 1200?C
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12828 |
| Date | 23 July 2013 |
| Creators | Anuncia??o, Elenise Barreto Barbosa da |
| Contributors | CPF:80732810400, http://lattes.cnpq.br/8671649752936793, Paskocimas, Carlos Alberto, CPF:06296687877, http://lattes.cnpq.br/2365059843175411, Acchar, Wilson, CPF:50580396720, http://lattes.cnpq.br/5460040602567184, Moraes, M?rcio Luiz Varela Nogueira de, CPF:01157194745, http://lattes.cnpq.br/2573306822477569, Dutra, Ricardo Peixoto Suassuna, CPF:91875838449, http://lattes.cnpq.br/0075804072604913, Nascimento, Rubens Maribondo do |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia de Materiais, UFRN, BR, Processamento de Materiais a partir do P?; Pol?meros e Comp?sitos; Processamento de Materiais a part |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| 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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