Proton Implantation into Tungsten Phosphate Glass Using Corona Discharging

Phosphate glass with composition of 35NaO1/2–20WO3–45PO5/2 prepared by a conventional melt-quenching method was treated by a positive corona discharging at room temperature. It was found that the OH concentration in the top surface layer of the glass increased by the treatment of +6.0–7.5 kV, for 10 h in 5%H2-95%N2 atmosphere and 5.0 mm in positive electrode and glass surface distance. On the other hand, the Na ion in the same area of 15 μm thickness diffused and precipitated to the bottom surface. It was found by the infrared and Raman spectra that the Na was replaced by implanted proton without notable structural change.