Glass, glass article, method of making the glass, use of the glass and flash lamp comprising the glass
AssigneeSchott AG
InventorsAndre Petershans, Carina Bronnbauer, Sebastian Heinl, Hans Lippert
Life of this patent
Estimating the term…
Abstract
A glass has a coefficient of thermal expansion in a temperature range from 20° C. to 300° C. of 4.5 ppm/K or less, and a T4 temperature, defined as the temperature at which the glass has a viscosity of 104 dPa*s, at 1500° C. or more, and having a reboil propensity score of less than 10 measured in a reboil propensity test. The reboil propensity score is determined as a number of bubbles per glass rod formed from the glass after the reboil propensity test.
Claims17
A glass having a coefficient of thermal expansion in a temperature range from 20° C. to 300° C. of 4.5 ppm/K or less, and a T4 temperature, defined as the temperature at which the glass has a viscosity of 104 dPa*s, at 1500° C. or more, and having a reboil propensity score of less than 10 measured in a reboil propensity test, wherein the reboil propensity score is determined as a number of bubbles per glass rod formed from the glass after the reboil propensity test.
At least one glass article, the at least one glass article comprising:
- a glass having a coefficient of thermal expansion in a temperature range from 20° C. to 300° C. of 4.5 ppm/K or less, and a T4 temperature, defined as the temperature at which the glass has a viscosity of 104 dPa*s, at 1500° C. or more, the glass having a water content of at least 35 mmol/l.
A flash lamp, comprising:
- a glass having a coefficient of thermal expansion in a temperature range from 20° C. to 300° C. of 4.5 ppm/K or less, and a T4 temperature, defined as the temperature at which the glass has a viscosity of 104 dPa*s, at 1500° C. or more, and having a reboil propensity score of less than 10 measured in a reboil propensity test, wherein the reboil propensity score is determined as a number of bubbles per glass rod formed from the glass.
Dependencies are inferred from the claim text.