Effect of Frit Content in Ag Paste and Thickness of Transparent Dielectric on Yellowing Phenomenon
To determine the causes of the yellowing phenomenon on transparent dielectrics, we investigated a bus electrode and transparent dielectric, varying the amounts of frit content in the Ag paste and experimenting with the thickness of the dielectric. It was found that increasing the frit content in the Ag paste coating caused the transparent dielectric to experience greater discoloration, so that it gradually turned a deep yellow, which suggests that oxygen in the air is a factor causing discoloration of the transparent dielectric during firing.
Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee
J. S. Jeon et al., "Effect of Frit Content in Ag Paste and Thickness of Transparent Dielectric on Yellowing Phenomenon", Materials Science Forum, Vols. 510-511, pp. 506-509, 2006