Effects of Filler Size and Distribution on Viscous Behavior of Glass Composites

Abstract

We study the viscous behavior of glass composites with respect to type of filler, filler size, distribution, and interaction between the matrix and filler for industrial applications. Here, the viscosities of the composites were analyzed as a function of the type/size of the fillers (up to 20 wt% of Al2O3, ZnO, and TiO2) in a glass (Bi2O3–B2O3–ZnO) matrix. The particle size was varied from 1 to 10 μm, which influenced the fluidity of the glass matrix in the composite. Characterizations of the composites were carried out by dilatometry, differential thermal analysis, hot‐stage microscopy, and scanning electron microscopy. Fillers having the same particle size as that of the parent glass showed better fluidity behavior. With higher filler content, the filler plays no role in the composite's behavior, whereas a lower to medium amount of filler plays a significant role in the composite's behavior. Fillers with smaller sizes than those of the glass matrix show good dispersion throughout the matrix but agglomeration was observed in some areas.

Calibration and Use of the Heating Microscope for Indirect Evaluation of the Viscosity and Meltability of Archeological Glasses

“…), and its presence did not induce any other crystalline phase to be generated during the HSM heating treatment. Moreover, a recent study by Samal et al . deals with the effects of crystalline fillers, which were intentionally added to a glass matrix, on the HSM characteristic temperatures to build the viscosity curves for glass‐composite or glass‐ceramic materials.…”

Glassy Polymers—Diffusion, Sorption, Ageing and Applications

“…The mechanisms of the production of composites with varied particle sizes are depicted schematically. (a) Fillers with larger particles sizes (10 µm) than the glass particles (5 µm); (b) Same filler and glass particle sizes (5 µm); (c) Fillers with smaller particle sizes (1 µm) than the glass particles (5 µm) (used with copyright permission)[95].…”

Influences of Liquid‐Phase Sintering on Structure, Grain Growth, and Dielectric Behavior of PbZr0.52Ti0.48O3 Ceramics

“…The uniformly melted glass phase accelerates the densification of sintered bodies. The rate of melting of glass phase depends on the viscosity, which is a function of temperature and content of glass in ceramics . Thus, the activation energy of viscous flow, which is particularly important for sintering, is also a function of content of glass.…”

“…The rate of melting of glass phase depends on the viscosity, which is a function of temperature and content of glass in ceramics. 29 Thus, the activation energy of viscous flow, which is particularly important for sintering, is also a function of content of glass. The highest rate of densification observed for 1%ZB in the present work attributes to low activation energy of viscous flow, which can penetrate easily in the voids between PZT particles and enhance sinterability.…”