Effect of Zirconium Dioxide in BaO-ZnO-B2O3-SiO2 system on Optical Properties of Color Conversion Glasses

Title & Authors
Effect of Zirconium Dioxide in BaO-ZnO-B2O3-SiO2 system on Optical Properties of Color Conversion Glasses
Jeong, HyeonJin; Jeon, Dae-Woo; Kim, Jin-Ho; Lee, Young Jin; Lee, MiJai; Hwang, Jonghee; Lee, Jungsoo; Yang, Yunsung; Youk, Sookyung; Park, Tae-Ho; Shin, Dongwook;

Abstract
The effect of zirconium dioxide ($\small{ZrO_2}$) on the properties of color conversion glasses was examined in the $\small{BaO-ZnO-B_2O_3-SiO_2}$ system. The difference in refractive index between glass and phosphor affect the optical properties of the color conversion glass because of light scattering. Reducing the difference in refractive index is a method to improve the luminous efficacy of color conversion glasses. As a reference, a type of glass that contains 25 mol% of each component was used. To increase the refractive index of the glass samples, the BaO content was increased from 25 to 40 mol%, and $\small{ZrO_2}$ was added at levels of 1, 3, and 5 mol%. Color conversion glasses were prepared by sintering a mixture of glass and 5 wt% $\small{YAG:Ce^{3+}}$ phosphor. As a result, the refractive index of the glass was found to be dependent on the BaO and $\small{ZrO_}$$\small{2}$ contents in the BaO-ZnO-$\small{B_2O_3-SiO_2}$ system. As the BaO and $\small{ZrO_2}$ contents were increased, the luminous efficacy of the color conversion glass was improved because the refractive index difference between the glass and the $\small{YAG:Ce^{3+}}$ phosphor decreased.
Keywords
Color conversion glass;Glass composition;YAG phosphor;Refractive index;
Language
English
Cited by
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