ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 43, (3) 91 - 93 (1999)


LEAD CONCENTRATION PROFILES IN THE SURFACE OF LEAD CRYSTAL GLASS
 
Rybaříková Ludmila 1, Jiříček Petr 2, Hradecká Helena 1
 
1 Department of Glass and Ceramics, Istitute of Chemical Technology, Prague, Technická 5, 166 28 Prague
2 Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 00 Prague

Concentration profiles of lead in the surface of lead crystal glass (24 wt.%) treated by products of decomposition of ammonium chloride at 280 °C and 450 °C were measured by the method of photoelectron spectroscopy. The concentration profiles showed that the dealkalization resulted in a distinct reduction of lead concentration in the glass surface already at the lower treatment temperature (280 °C). The dealkalized surfaces yielded very low extracts of lead even by long-term leaching into 4 vol.% acetic acid at room temperature.


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