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

Effect of calcination temperature on the properties of bovine bone ash for the fabrication of bone china

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Author(s):
D. Gouvêa [1] ; S. Bernard [2] ; G. A. V. Alatrista [3] ; S. M. Tofolli [4]
Total Authors: 4
Affiliation:
[1] Universidade de S. Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
[2] Universidade de S. Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
[3] Universidade de S. Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
[4] Universidade de S. Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
Total Affiliations: 4
Document type: Journal article
Source: Cerâmica; v. 53, n. 328, p. 423-428, 2007-12-00.
Abstract

Calcined bovine bones comprise the main raw material for the fabrication of Bone China (more than 50 wt.%). This special kind of porcelain has never been produced in Brazil. In this paper, the influence of the following preparation steps: firing, grinding, and washing of the bones, on the physicochemical characteristics of the obtained bone ash particles was investigated. Powders calcined at temperatures between 700 and 1000 ºC, washed and ground, were analyzed in terms of their particle size distribution, chemical composition (X-ray fluorescence), density (He picnometry), specific surface area (BET method), infrared spectroscopy (FTIR-DRIFT), and also in a scanning electron microscopy. The results indicated that bones processed at different temperatures exhibit great homogeneity either in chemical terms (chemical composition and electrophoretic mobility) or in physical terms (particle size and phase composition), show slight increase in particle size with increasing firing temperatures and must be calcined under oxidizing atmospheres in order to develop good processing characteristics. (AU)