Stress Corrosion of a High-Transmittance Glass for Solar Applications

摘要

Measurements have been made of the stress corrosion coefficients A and n in the relationship v = AK/sub I//sup n/ (where v is the crack velocity and K/sub I/ is the stress intensity) as well as the critical stress intensity factor K/sub IC/, for a new flat glass for solar energy applications. It was found that this new glass, Corning Glass Works Code 7809, has an n of 26.6, versus 17.9 for soda-lime-silicate float glass. This implies that the 7809 has lower stress corrosion cracking susceptibility than the float glass. The critical stress intensity factor for the 7809 was 0.75 MP a sqrt m versus 0.71 for float glass. (ERA citation 07:046416)