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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 chemical composition modification on sinterability and microstructure of bone china

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Author(s):
D. Gouvêa [1] ; S. Hirakata [2] ; H. Kahn [3]
Total Authors: 3
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 Minas e de Petróleo
Total Affiliations: 3
Document type: Journal article
Source: Cerâmica; v. 56, n. 340, p. 393-398, 2010-12-00.
Abstract

Bone china is a type of high quality porcelain body first developed in Britain in which calcined cattle bone (bone ash) is a major component (50%), but with also Cornish stone (25%) and kaolin (25%). Whiteness, strength and high translucency are the characteristic features of this ware. Cornish stone acts as a flux in the bone china, melting first and acting as a solvent for the other constituents. In this work Cornish stone was substituted by feldspar as a flux and the mixtures 50:25:25, 50:30:20 and 60:20:20 (Bone Ash:feldspar:kaolin) were sintered from 1000 to 1300 ºC (50 ºC steps). The samples were characterized by X-ray diffraction, mercury porosimetry, scanning electron microscopy, X-ray fluorescence and dilatometry. All samples sintered at temperatures lower than that of original bone china and the 60:20:20 composition presented complete densification at 1200 ºC, 80 ºC lower than the British pottery, and show a homogeneous microstructure. (AU)