The Effect of Si3N4 and BN on the Luminescent Properties of Europium-Doped Borosilicate Glass
Europium ions are commonly found in nature as Eu3+ ;however,luminescent materials doped with europium ions can only achieve white light emission when Eu2+ and Eu3+ coexist at appropriate concentrations.During the preparation of europium-doped borosilicate glass in a reducing atmosphere,it is challenging to obtain luminescent materials with the coexistence of Eu2+ and Eu3+ ions,as Eu3+ ions tend to be completely reduced to Eu2+ .This study compared the effects of reducing agents Si3N4 and BN on the luminescent properties of europium-doped borosilicate glass under firing conditions in air atmosphere.The results showed that both Si3N4 and BN could partially reduce the europium ions in borosilicate glass under air atmosphere,with Si3N4 exhibiting stronger reducing ability than BN.When the substitution of Si3N4 reaches 5 mol％,the Eu2+ concentration dominates in the europium-doped borosilicate glass samples,with CIE coordinates of(x=0.29,y=0.34),indicating the significant potential applications of Si3N4 reduced europium-doped borosilicate glasses as fluorescent materials in the field of white light illumination.
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