Abstract
Borate glasses containing Ag2O were prepared and their emission spectra were measured. The glasses showed blue emission by the excitation at 260nm and white emission at 320nm. The solubility of Ag2O decreases by the addition of SiO2 and the effect of SiO2 is similar to that of Na2O. The intensity of blue emission shows no dependence on SiO2 content, but that of white emission shows. Since the intensity of white emission also depends on Ag2O content, it is considered that this emission is caused by nano clusters of silver atoms formed by the reduction of Ag2O.
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