A DATABASE FOR THE STATIC DIELECTRIC-CONSTANT OF WATER AND STEAM

All reliable sources of data for the static dielectric constant or rel ative permittivity of water and steam, many of them unpublished or ina ccessible, have been collected, evaluated, corrected when required, an d converted to the ITS-90 temperature scale, The data extend over a te mperature range from 238 to 873 K and over a pressure range from 0.1 M Pa up to 1189 MPa. The evaluative part of this work includes a review of the different types of measurement techniques, and the corrections for frequency dependence due to the impedance of circuit components, a nd to electrode polarization, It also includes a detailed assessment o f the uncertainty of each particular data source,as compared to other sources in,the same range of pressure sind temperature, Both the raw a nd the corrected data have been tabulated, and are also available on d iskette. A comprehensive list of references to the literature is inclu ded. (C) 1995 American institute of Physics and American Chemical Soci ety.