Egan, P.
(2024),
Expansivity of fused quartz glass measured within 6 x 10^-10 K^-1, International Journal of Thermophysics, [online], https://doi.org/10.1007/s10765-024-03422-3, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935332
(Accessed April 29, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Expansivity of fused quartz glass measured within 6 x 10^-10 K^-1
Published
Author(s)
Abstract
A method is described to measure the thermal expansion coefficient of fused quartz glass. The measurement principle is to monitor the change in resonance frequency of a Fabry–Perot cavity as its temperature changes; the Fabry–Perot cavity is made from fused quartz glass. The standard uncertainty in the measurement was less than 0.6 (nm/m)/K, or 0.15 %. The limit on performance is arguably uncertainty in the reflection phase-shift temperature dependence, because neither thermooptic nor thermal expansion coefficients of thin-film coatings are reliably known. However, several other uncertainty contributors are at the same level of magnitude, and so any improvement in performance would entail significant effort. Furthermore, measurements of three different samples revealed that material inhomogeneity leads to differences in the effective thermal expansion coefficient of fused quartz; inhomogeneity in thermal expansion among samples is 24 times larger than the measurement uncertainty in a single sample.Citation
International Journal of Thermophysics
Volume
45
Issue
9
Pub Type
Journals
Download Paper
Keywords
thermal expansion, dimensional metrology, reference material
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created September 11, 2024