| Texto completo | |
| Autor(es): |
Gouvea, Douglas
;
Kaneko, Taisa Tisse
;
Kahn, Henrique
;
Conceicao, Edilene de Souza
;
Antoniassi, Juliana L.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CERAMICS INTERNATIONAL; v. 41, n. 1, p. 10-pg., 2015-01-01. |
| Resumo | |
Calcined bovine bone (CBB) is generally used to manufacture high-quality porcelain known as bone china. In these products, the amount of bone ash is about 50%. However, it is known that CBB, in small quantities added to raw materials such as feldspars, can reduce the liquidus temperature and thus promote liquid-phase sintering. The purpose of this study was to evaluate the potential use of bone ash as a sintering promoter of porcelain made by a classical triaxial system. Hard porcelain was prepared with 0, 1, 2, and 5 wt% CBB and sintered at temperatures ranging from 1100 to 1400 degrees C. For the sample containing 2% CBB, the sintering temperature was reduced by 50 degrees C relative to 0% CBB, while the sample's tensile strength was the highest among all samples. Two mechanisms could be observed during porcelain sintering depending on CBB quantities: for 1 and 2% of CBB, the mullite formation determined the final shrinkage without changes on initial sintering temperatures; for 5% the initial sintering temperature was decreased by liquid formation. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU) | |
| Processo FAPESP: | 05/55335-0 - Sinterização de materiais cristalinos |
| Beneficiário: | RICARDO HAUCH RIBEIRO DE CASTRO |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |