Feasibility of volumetric expansion of molten chlorides by conventional pushrod dilatometry

Journal Article · Thu Nov 24 23:00:00 EST 2022 · Journal of Radioanalytical and Nuclear Chemistry

DOI:https://doi.org/10.1007/s10967-022-08641-2· OSTI ID:1899787

Parker, S. S.; Abdul-Jabbar, N. M.; Jackson, J. M.; Monreal, M.

Abstract

This study is a short communication on progress made in the adaptation of conventional push-rod dilatometry for the measurement of volumetric expansion of liquid salts up to 1300 K. A new crucible design is offered as a practical solution for measurement of liquid salts by this method. Proof-of-concept measurements of the volumetric expansion of sodium chloride (NaCl) are compared to the available data in literature. Measurement of the coefficient of thermal expansion (CTE) of solid NaCl compared favorably to the available data in literature, confirming both magnitude and trend. The average CTE of NaCl (solid) was $$$$\overline{\alpha }_{{{\text{NaCl}}\;{\text{Solid}}}} = 5.63 \cdot 10^{ - 5} {\raise0.7ex\hbox{$$1$$} \!\mathord{\left/ {\vphantom {1 K}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{$$K$$}}$$ ${\overline{\alpha }}_{\text{NaCl}\text{Solid}}=5.63·{10}^{-5}\frac{1}{K}$ . The volumetric expansion of liquid NaCl was measured as $$$$\beta_{{{\text{NaCl}}\;{\text{Liquid}}}} \approx 3.96 \cdot 10^{ - 5} 1/K$$$$ ${\beta }_{\text{NaCl}\text{Liquid}}\approx 3.96·{10}^{-5}1/K$ and is essentially constant from the melt point to 1300 K. The volumetric expansion produced by this method is in reasonable agreement with the available published data and previous measurements made by the authors by neutron radiographic technique.

• Sponsoring Organization: USDOE
• OSTI ID: 1899787
• Journal Information: Journal of Radioanalytical and Nuclear Chemistry, Journal Name: Journal of Radioanalytical and Nuclear Chemistry Journal Issue: 12 Vol. 331; ISSN 0236-5731
• Publisher: Springer Science + Business Media
• Country of Publication: Hungary
• Language: English