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Surface Tension of Molten Alkali Borates
Author(s) -
SHARTSIS LEO,
CAPPS WEBSTER
Publication year - 1952
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1952.tb13094.x
Subject(s) - alkali metal , surface tension , boron , chemistry , lithium (medication) , potassium , atmospheric temperature range , inorganic chemistry , sodium , thermodynamics , maximum bubble pressure method , analytical chemistry (journal) , mineralogy , organic chemistry , medicine , physics , endocrinology
The surface tensions of a series of lithium, sodium, and potassium borate melts were measured by a maximum pull‐on‐cylinder method. All the alkali oxides raised the surface tension. In the high‐alkali range the order Li + > Na + > K + was observed for surface tension and for the algebraic value of the temperature coefficient of surface tension. In the low‐alkali range (up to 15 mole %) the order of surface tension was K + > Na + > Li + and the temperature coefficients of surface tension, independent of the type or concentration of alkali ion, had approximately the same value as that of B 2 O 3 . This behavior was interpreted as a tendency toward immiscibility limited to surface phenomena. Correlation was observed between alkali content, volume expansivity, and temperature coefficient of surface tension.