Thermophysical Properties of Ceramic Filler-Added BaO–ZnO–B2O3–P2O5 Glass Composites for Barrier Ribs of Plasma Display Panels

Abstract

The capability of BaO-ZnO-B 2 O 3 -P 2 O 5 glass in hosting various ceramic fillers (up to 20 mass% of Al 2 O 3 , TiO 2 , and ZnO) has been investigated. All the investigated filler-added glasses have demonstrated a reasonable densification at 550 • C to form stable ceramic filler-glass composites. Modifications of the thermophysical properties, such as coefficient of thermal expansion (CTE), glass transition temperature, and dilatometric softening temperature, by the addition of the fillers have been investigated and correlated to phase and microstructural evolution. The CTE of the fabricated composites with varying filler addition is well correlated with theoretical predictions based on the Turner equation considering the modification by phase evolution, which indicates the thermal property tuning potential of the BZBP-based glass composites for application to barrier ribs of plasma display panels.

Dielectric Constant and Optical Reflectance of Ceramic Filler‐Added BaO–ZnO–B2O3–P2O5 Glass Composites

“…Therefore, the unusually high optical reflectance of the glass frit sintered at 550°C is due to light scattering by these submicroscopic seeds. The formation of the submicroscopic nuclei of the crystals was previously reported in terms of thermal analysis 13 . The change in the DTA trace at temperatures <615°C 13 is attributed to the formation of the submicroscopic nuclei because the glass changed to a weakly opaque state in the temperature range from T g +20°C to <615°C while no crystalline phases appeared after the heat treatment in the same temperature range 13 .…”

“…The change in the DTA trace at temperatures <615°C 13 is attributed to the formation of the submicroscopic nuclei because the glass changed to a weakly opaque state in the temperature range from T g +20°C to <615°C while no crystalline phases appeared after the heat treatment in the same temperature range 13 . Therefore, the points marked in the DTA result, 515 and 567°C, 13 are believed to be the starting temperatures of the broad exothermic peaks for the formation of submicroscopic nuclei.…”

“…The crystalline phases of the fabricated composites are summarized in Table II 13 . For all the filler types investigated, BaZn 2 (PO 4 ) 2 turns out to be the major phase in light of the XRD intensity at 20 wt% filler addition at 550°C (Table II).…”

“…One of the key issues to be solved before a soda lime glass‐based panel can be used is the development of a barrier rib material that can be sintered at approximately 500°C, which is lower than the required sintering temperature to be used with the PD200 panel 9 . The addition of P 2 O 5 to the BaO–ZnO–B 2 O 3 –P 2 O 5 (BZBP) glass can lower the sintering temperature, but it needs to be confirmed whether or not the P 2 O 5 ‐containing glass can successfully form a composite with a reasonable densification and good dispersion of the added fillers but without excessive dissolution of the fillers 10–13 . Furthermore, it is important to know if the BZBP glass‐based composites have the appropriate dielectric and optical properties.…”

Synthesis and characterization of barium borosilicate glass–Al2O3 composites

“…Various authors have studied the influence of aluminum oxide in borate and borosilicate glasses and have made structure-property correlation of these glasses [8][9][10][11][12]. In the present study, the effect of addition of different wt% of crystalline Al 2 O 3 (alumina) powder on the thermal, dielectric and spectroscopic properties of 30BaO-60B 2 O 3 -10SiO 2 glass have been examined.…”