Preparation of Pb<SUP>2+</SUP> Ion Conducting &beta;&Prime;-Alumina and Its Application to Thermodynamic Investigation of Sulfides

Abstract

the following galvanic cell was assembled, and equilibrium emf measurements were carried out in the temperature range from 411 to 1041 K:The standard Gibbs free energy of the following exchange reaction was calculated from the emf's:Pb+Ag2S=2Ag+PbS.The Gibbs energy was in close agreement with the literature value.

Ion Selectivity of Beta‐Alumina during the Coulometric Titration of Liquid Pb‐Na Alloys

“…Na § ions in the single-crystals of 8-and 8"-alumina can be completely ion exchanged by Pb 2 § ion (18-21) with the ionic conductivity of the pb2 § the highest of all the divalent ~"-alumina (19). Na § ions in the polycrystaUine ~"-alumina also can be easily ion exchanged by Pb z § ion in a molten salt (22,23).This study was undertaken to obtain information on the stability of ~-and ~"-alumina involved in the application of the purification and separation of liquid alloys. As a first step, the ion selectivity of polycrystalline ~-and ~"-alumina during the coulometric titration experiments was investigated using a galvanic cell with a liquid Pb-Na alloy electrode.…”

“…Na § ions in the single-crystals of 8-and 8"-alumina can be completely ion exchanged by Pb 2 § ion (18)(19)(20)(21) with the ionic conductivity of the pb2 § the highest of all the divalent ~"-alumina (19). Na § ions in the polycrystaUine ~"-alumina also can be easily ion exchanged by Pb z § ion in a molten salt (22,23).…”

Activity Measurements of Copper in Solid Copper-Nickel Alloys using Copper-Beta-Alumina

“…[8][9][10][11][12][13][14][15][16][17][18][19][20] On the otherhand, in addition to ion-exchange research, there are some thermochemical researches involving the ionexchanged -or 00 -alumina. The following studies have been reported: measurements of Ag activity in solid Ag-Pd alloys using Ag þ -00 -alumina, 21) Ag activity in solid Ag-Au alloys 22) using Ag þ --alumina and Cu activity in liquid Cu-Sn alloys using Cu þ --alumina, 23) developments of SO x sensor using Ag þ --alumina 24,25) and NO x sensor using Ag þ --alumina, 26) determinations of 27) thermodynamic studies of sulfides using (Pb þ -Na þ )--alumina, 28) and so on. In this experiment, Na þ -00 -alumina was exchanged for Cu þ -00 -alumina by immersion in molten cuprous chloride.…”