9.355 GHz complex permittivity of water from 1 degrees C to 90 degrees C

Autor:	O Barajas, H A Buckmaster
Rok vydání:	1992
Předmět:	Permittivity chemistry.chemical_classification Liquid state Chemistry Enthalpy Sigma Thermodynamics General Materials Science Dielectric loss Activation energy Condensed Matter Physics Inorganic compound Microwave
Zdroj:	Journal of Physics: Condensed Matter. 4:8671-8682
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/4/45/003
Popis:	This paper reports the results of a systematic study of the 9.355 GHz complex permittivity of double-distilled, deionized water over the temperature interval from 1 degrees C to 90 degrees C in approximately 2 degrees C steps. A precision of approximately 0.03% and an accuracy of approximately 0.1% were achieved for both the permittivity epsilon ' and the dielectric loss epsilon ". It shows that the values of the thermodynamic parameters entropy ( Delta S), enthalpy ( Delta H), and free energy ( Delta F) of activation are temperature dependent, contrary to previous reports. The temperature dependence of the relaxation time in this temperature interval is in good agreement with that reported in the literature. The values of the thermodynamic functions, calculated using the various pairs of alpha and epsilon infinity values reported in the literature, agree within 1 sigma over most of the measurement temperature interval.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6aa322728f8e5da52d8fb267a5e417f6 https://doi.org/10.1088/0953-8984/4/45/003 Zobrazit plný text záznamu