| Influence of SiO2 and Al2O3 Fillers on Thermal and Dielectric Properties of Barium Zinc Borate Glass Microcomposites for Barrier Rib of Plasma Display Panels (PDPs) |
Shiv Prakash Singh, Karan Pal, Anal Tarafder, Tarak Hazra and Basudeb Karmakar*
Pages: 75-82
DOI : 10.1080/0371750X.2010.11090821 |
| Abstract |
| In a lead-free low temperature sinterable multicomponent barium zinc borate glass system, BaO-ZnO-B2O3-SiO2-Li2O-Na2O (BZBSLN), the influence of SiO2 (amorphous) and Al2O3 (crystalline,-alumina) ceramic fillers on the softening point (Ts), glass transition temperature (Tg), coefficient of thermal expansion (CTE), and dielectric constant (r) has been investigated with a view to its use as the barrier ribs of plasma display panels (PDPs). The interaction of fillers with glass which occurred during sintering at 570oC has also been studied by XRD and FTIR spectroscopic analyses. It is observed that the filler has partially dissolved in the glass at the sintering temperature leaving some residual filler which results in ceramic-glass microcomposites. The distribution of fillers in the glass matrix and microstructures of the composites have been analyzed by SEM images. It has been seen that the Ts, Tg, CTE and r slightly increased with the increase of Al2O3 content. In the case of SiO2 filler, the Ts and Tg gradually increased whereas CTE and r gradually decreased along with the addition of SiO2. These experimentally measured properties have also been compared with the theoretically predicted values. Both the experimental and theoretical predictions of these properties with added filler contents have been found to be correlated very well. In consideration of the desired properties of barrier rib of PDPs with respect to use on PD200 glass substrates, the addition of Al2O3 filler to BZBSLN glass has been found to be more preferable than SiO2 filler. |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
|
