Effect of Alumina on Crystallization of Low-Dielectric Lead Borosilicate Glass

Abstract

Formation of cristobalite in lead borosilicate glass at 700° C is completely prevented by addition of 5-10 vol% alumina. Thermal expansion results show that, in contrast to the sample without a sufficient amount of alumina, the thermal expansion coefficient of the cristobalite-free sample remains relatively unchanged with sintering time at the temperature investigated, and is close to those theoretically calculated.

Effect of SiO2 Addition to BaO-ZnO-B2O3 Glass on Dielectric and Thermal Properties for Application to Barrier Ribs of Plasma Display Panels

“…For these fired glass specimens (BZB and SBZB) from respective glass frits, there was no appreciable difference of dielectric constant from the as-quenched glass due to the successful densification. 2 As noted in Fig. 4, the dielectric constant of the specimens with quartz filler is even lower than the SBZB glass, indicating that the addition of quartz filler can further reduce the dielectric constant.…”

“…Lead borosilicate glasses have been mostly used as barrier ribs in plasma display panel (PDP) systems [1][2][3] due to desireable application properties such as low softening temperature, comparable coefficient of thermal expansion to aluminium borosilicate glass panels such as PD200 (8.3 × 10 −6 /K; Asahi Glass, Tokyo, Japan), low dielectric constant, and high reflectivity. In addition to the basic components such as PbO-B 2 O 3 -ZnO-SiO 2 , several minor components such as Al 2 O 3 , TiO 2 , and MgO were added to modify the properties of the glass itself.…”

Role of submicron residual fillers in improving optical reflectance of barrier rib glasses for plasma display panels

“…Lead borosilicate glasses [3][4][5] have been mainly used as barrier rib materials. In general, micronscale crystalline fillers are added to the lead borosilicate glass; thereby, it forms a filler particulate reinforced glass matrix composite system.…”

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

“…In order to enable the glass matrix to host various types of refractory ceramic fillers, it is important during the development of the composites that sintering be conducted at a reasonably low processing temperature, e.g., 550 • C, with a strong interfacial bond between the filler and the matrix. Conventionally, lead oxidecontaining borosilicate glasses have been used for the matrix of the barrier ribs [1,2] because of their good hosting capability of refractory ceramic fillers, low-softening temperature, comparable CTE to aluminum borosilicate glass panels such as PD200 (8.3× 10 −6 K −1 ; Asahi Glass, Tokyo, Japan), low dielectric constant, and high optical reflectance. Because of the deleterious influence of PbO on health and environment during processing, there has been much work to avoid the use of PbO constituents.…”