SciELO - Scientific Electronic Library Online

 
vol.55 issue335Performance of advanced concretes for building site designed by computing mix proportion technique author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Cerâmica

Print version ISSN 0366-6913

Abstract

HIDAKA, M. et al. Local structures and electronic band states of α-Fe2O3 polycrystalline particles included in the red-color overglazes and the transparent glazes of the Kakiemon-style porcelains by means of X-ray absorption spectra (i). Cerâmica [online]. 2009, vol.55, n.335, pp. 223-232. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132009000300001.

Kakiemon-style porcelain is mainly characterized by the porcelain body of white color or milky-white color and the elegant and bright patterns of the colored overglazes on its white body. The porcelains were first developed and completed by Kakiemon-kiln family in 1650-80's. The red-color overglazes and the transparent glazes of the present porcelain pieces, which were produced in the early 17th century to the middle 18th century, have been investigated by means of X-ray absorption spectrum using synchrotron radiation. The structure of α-Fe2O3 as red-color emission element is slightly deformed in the red-color overglazes by the other surrounding oxides (SiO2, Al2O3, K2O, Na2O, MgO, PbO), and/or the new complexes of (SiO2-Al2O3,) systems constructed by the raw materials. The Fe ions in the transparent glazes are in the glass-state with the other oxides. However, the electronic valence, Fe3+, of Fe ions is the same with that of the α-Fe2O3 in the red-color overglazes. The lead oxides (PbO, Pb3O4) used in the Edo period to increase the brightness in the fritted red-color overglazes were perfectly decomposed, and Pb ions were in the glass-state of the porcelains.

Keywords : Kakiemon-style porcelains; red-overglaze; transparent glaze.

        · abstract in Portuguese     · text in English     · pdf in English