Influence of Electron Beam Irradiation on The Nucleation of Fine Water Drops on Misted Silicate (SiO₂) Glass

Abstract

By using an electron beam irradiation, reproducible active surface condition of misting can be obtained on the silicate glass. Since an electron beam irradiation activates the SiO2 surface, it controls and enhances the nucleation frequency of fine water drops. The dangling bond is one of reasons to activate the surface condition. Based on the results of electron spin resonance (ESR) spectra, the electron beam irradiation increases the density of E'-center on the surface.

Electron Beam Processed Silica Glass with Multi-Property

“…ESR signals were observed for silica glasses irradiated by electron beam. 14) A sharp ESR signal was observed in irradiated pure silica glass corresponding to dangling bonds of an E-prime center, 15) with a chemical bonding energy of 627 kJ/mol per Si-O pair.…”

“…14,16) and charging 3) caused adsorption 17) of poled molecules. Since water molecules show poling, the water contact angle should be small on surface of silica glass irradiated by electron beam.…”

Influence of Electron Beam Irradiation on Bending Fracture Stress for Soda Glass

“…[1][2][3][4][5][6][7][8][9][10][11] Figure 1 shows the schematic diagram of the apparatus. The specimen was homogeneously irradiated by the electron beam through a titanium thin film window attached to the vacuum chamber (240 mm in diameter).…”

“…To control physical properties such as wetting, and freedom from misting and to facilitate the fracture-free sterilization of glassy ceramics, electron beam irradiation techniques are presently being developed to assist the production of dentists' mirrors, sapphire lenses for endoscopes, diamond windows, and silica glass. [1][2][3][4] Recently, EB reinforcement methods have been established for carbon fiber (CF), carbon deposited carbon fiber (C/C) composite materials and carbon fiber reinforced polymer (CFRP). [5][6][7][8][9] However, another effect of EB irradiation is the homogeneous activation of surface atoms and the breaking of the chemical bonds between the Si-O pairs in the network structure of a surface layer of silica glass.…”

“…[5][6][7][8][9] However, another effect of EB irradiation is the homogeneous activation of surface atoms and the breaking of the chemical bonds between the Si-O pairs in the network structure of a surface layer of silica glass. 4) By this means, such irradiation induces a resistance to fracture under loading in the tightly bonded network structure of silica glass. 10,11) To evaluate the load resistances to elastic and plastic deformations and fracture stress and strain, a knowledge of the stress-strain curve is important.…”