CFA FCT/UNL is one of the two scientific groups of Centro de Física Atómica (CFA). Most of its members belong to Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa (FCTUNL).
Golden glazes analysis by PIGE and PIXE techniques
| Title | Golden glazes analysis by PIGE and PIXE techniques |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | M, Fonseca, H Luis, N Franco, MA Reis, PC Chaves, A Taborda, J Cruz, D Galaviz, N Fernandes, P Vieira, JP Ribeiro, and AP Jesus |
| Volume | 269 |
| Date Published | Jan |
| Keywords | analysis;, Optical, PIGE;, PIXE;, Quantitative, reflection, samples, spectroscopy, thick |
| Abstract | We present the analysis performed on the chemical composition of two golden glazes available in the market using the PIGE and PIXE techniques at the ITN ion beam laboratory. The analysis of the light elements was performed using the Emitted Radiation Yield Analysis (ERYA) code, a standard-free method for PIGE analysis on thick samples. The results were compared to those obtained on an old glaze. Consistently high concentrations of lead and sodium were found in all analyzed golden glazes. The analysis of the samples pointed to Mo and Co as the specific elements responsible of the gold colour at the desired temperature, and allowed Portuguese ceramists to produce a golden glaze at . Optical reflection spectra of the glazes are given, showing that the produced glaze has a spectrum similar to the old glaze. Also, in order to help the ceramists, the unknown compositions of four different types of frits (one of the components of glazes) were analysed. |
Research