Thermal expansion coefficient of single-crystal silicon from 7 K to 293 K
- 19 November 2015
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 92 (17), 174113
- https://doi.org/10.1103/physrevb.92.174113
Abstract
We measured the absolute lengths of three single-crystal silicon samples by means of an imaging Twyman-Green interferometer in the temperature range from 7 K to 293 K with uncertainties of about 1 nm. From these measurements we extracted the coefficient of thermal expansion with uncertainties on the order of . To access the functional dependence of the length on the temperature, usually polynomials are fitted to the data. Instead we used a physically motivated model equation with seven fit parameters for the whole temperature range. The coefficient of thermal expansion is obtained from the derivative of the best fit. The measurements conducted in 2012 and 2014 demonstrate a high reproducibility, and the agreement of two independently produced samples supports single-crystal silicon as a reference material for thermal expansion. Although the results for all three samples agree with each other and with measurements performed at other institutes, they significantly differ from the currently recommended values for the thermal expansion of crystalline silicon.
Keywords
Funding Information
- European Space Agency (QT6986)
This publication has 20 references indexed in Scilit:
- A new Ultra Precision Interferometer for absolute length measurements down to cryogenic temperaturesMeasurement Science and Technology, 2012
- High-precision CTE measurement of hybrid C/SiC composite for cryogenic space telescopesCryogenics, 2012
- Ultraprecise studies of the thermal expansion coefficient of diamond using backscattering x-ray diffractionPhysical Review B, 2011
- HerschelSpace ObservatoryAstronomy & Astrophysics, 2010
- Thermal Expansion of Diamond at Low TemperaturesPhysical Review Letters, 2010
- High‐Precision CTE Measurement of SiC‐100 for Cryogenic Space TelescopesPublications of the Astronomical Society of the Pacific, 2007
- The James Webb Space TelescopeSpace Science Reviews, 2006
- Interferometric dilatometer for thermal expansion coefficient determination in the 4–300 K rangeMeasurement Science and Technology, 2006
- Linear Thermal Expansion Measurements of Single Crystal Silicon for Validation of Interferometer Based Cryogenic DilatometerAIP Conference Proceedings, 2006
- High-precision measurements of the thermal expansion at cryogenic temperature on stable materials