Ceramics-Silikáty 43 (3) 91-93 (1999)

LEAD CONCENTRATION PROFILES IN THE SURFACE OF LEAD CRYSTAL GLASS

L. Rybaříková, P. Jiříček, H. Hradecká

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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