A review of the physical and thermodynamic properties of boric oxide Page: 2 of 27
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3 1176 01436 5689
NACA RM E57B 14
C
NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS
RESEARCH MEMORANDUM
A REVIEW OF THE PHYSICAL AND THERMODYNAMIC
PROPERTIES OF BORIC OXIDE
By Paul C. Setze
SUMMARY
A review of the current literature on the thermodynamic
and physical properties of boric oxide (B203) was made. What
were considered to be the most accurate data available on each
of the following properties are presented in tabular and graph-
ical form: specific heat, sensible enthalpy, total enthalpy,
Sentropy, latent heat of vaporization, and vapor pressure for
the crystal, liquid, and vapor states. Also given are data
on specific gravity, surface tension, viscosity, and electri-
cal resistivity. In addition, basic molecular and structural
data are presented.
A discussion of each property is included, and reasons
are stated for choosing one set of data in preference to another.
INTRODUCTION
In 1951 reference 1 was published giving tabulated data
on the thermodynamic properties of a number of chemical ele-
ments and compounds. Among these compounds was boric oxide.
Since that time new data on the properties of boric oxide have
become available. This report reviews the published literature,
presents what are believed to be the most accurate data now
available on both the thermodynamic and physical properties
of boric oxide, and extends the data where possible. This re-
view is especially important in the light of some unreported
experimental observations which make the extrapolation of
existing data questionable. These cases will be discussed.
A search of the literature was made, and the data are
presented in both graphical and tabular form. Each property
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Setze, Paul C. A review of the physical and thermodynamic properties of boric oxide, report, April 24, 1957; (https://digital.library.unt.edu/ark:/67531/metadc63184/m1/2/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.