Influence of electron-beam bombardment upon gas-barrier property of hollow glass microspheres

In order to study the influence of β electrons from tritium decay upon hydrogen-barrier property of hollow glass microspheres(HGMs), this paper investigates the potassium ion migration and its impact on glass structure and gas-barrier property using XPS on-site characterization. Experiments reveal that, above the threshold dose of irradiation, the hydrogen-barrier property of HGM decreases with the increase of K2O in glass due to the formation of potassium ion migration net. For given glass composition and above the threshold dose, the formation of potassium ion migration net would become easier and the hydrogen-barrier property of HGM would decrease faster with the irradiation dose increasing.