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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Using bone ash as an additive in porcelain sintering

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Gouvea, Douglas [1] ; Kaneko, Taisa Tisse [1] ; Kahn, Henrique [2] ; Conceicao, Edilene de Souza [1] ; Antoniassi, Juliana L. [2]
Total Authors: 5
[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
Total Affiliations: 2
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 41, n. 1, A, p. 487-496, JAN 2015.
Web of Science Citations: 4

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)

FAPESP's process: 05/55335-0 - Sintering of crystalline materials
Grantee:Ricardo Hauch Ribeiro de Castro
Support type: Research Grants - Young Investigators Grants