抄録
An original technique, using microwave plasmas in pure nitrogen and mixed with hydrogen, is implemented in the aim of surface nitridation of a sodium metaphosphate glass. The microwave discharges, ignited at pressures in the range of hundred Pa, are characterised by high concentrations of excited and ionised species. In the case of nitrogen plasmas a secondary ionisation zone, called the short - lived afterglow, appears downstream from the discharge. This latter region is presently used for glass treatments. X-ray photoelectron spectroscopy (XPS) analysis shows that a significant amount of nitrogen (0.4 - 1.3 at.%), with > N -and-NH-chemical forms, is grafted on the glass surface treated during 2 hours by both plasmas. Then, the ratio of bridging/non-bridging oxygens, deduced from XPS analysis. decreases with increasing the treatment time.
