ULE® Corning Code 7972 Ultra Low Expansion Glass is a titania silicate glass. It is used in applications ranging from machine tool reference blocks to solid and lightweight mirror blanks for large astronomical telescopes and space satellite applications. The mean linear CTE is 0 ± 30 ppb/°C from 5°C to 35°C with a 95% confidence level, and is tested on each boule. Excellent resistance to weathering. Exhibits virtually no surface clouding or electrical surface leakage when subjected to attack by water, sulfur dioxide, and other atmospheric gases. High resistance to attack by nearly all chemical agents. Information provided by Corning Incorporated. |