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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Using bone ash as an additive in porcelain sintering

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Autor(es):
Gouvea, Douglas [1] ; Kaneko, Taisa Tisse [1] ; Kahn, Henrique [2] ; Conceicao, Edilene de Souza [1] ; Antoniassi, Juliana L. [2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Escola Politecn Univ Sao Paulo, Dept Met & Mat Engn, Lab Proc Ceram, BR-05580900 Sao Paulo - Brazil
[2] Escola Politecn Univ Sao Paulo, Dept Engn Minas & Petr, Lab Caracterizacao Tecnol, BR-05580900 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: CERAMICS INTERNATIONAL; v. 41, n. 1, A, p. 487-496, JAN 2015.
Citações Web of Science: 4
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
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores