Untersuchungen an Kieselglas mittels Positronenannihilation

Abstract

Measurements of positron annihilation (Doppler broadening, lifetime) of different silica glasses led to statements about the degree of order of such glasses. Silica glass molten from quartz crystals showed a higher degree of order than synthetic silica glasses synthesized from SiCl4; the degree of order of silica glasses increases at heat treatments above 900 °C and is influenced by the manufacturing technology. The degree of order is considered in connection with the pre-order conception.