Thermodynamic properties of Pb2PtO4 and PbPt2O4 and phase equilibria in the system Pb–Pt–O

Thermodynamic Properties of LaCrO4, La2CrO6, and La2Cr3O12, and Subsolidus Phase Relations in the System Lanthanum–Chromium–Oxygen

“…A leak test was performed on the (Y 2 O 3 )ZrO 2 tubes before use to ensure the absence of physical permeability. The apparatus used for the measurements and the procedure employed were similar to those described elsewhere . Hence, only a brief description of the essential points is given here.…”

Experimental phase equilibria studies of the PbO–SiO2 system

“…In this study, two types of substrates were used for equilibration, depending on the conditions: Sealed silica ampoules were used for experiments at silica saturation (900°C‐1580°C). This approach prevented the loss of PbO from the sample through evaporation at high temperatures. Gold foil or wire baskets were used for high‐PbO compositions, because, in several preliminary experiments in air, Pt foil was found to react with PbO from the slag over long time to form the compound PbPt 2 O 4 . To avoid local formation of metallic Pb that may react with gold and destroy the substrate, PbO was converted into Pb 3 O 4 by heating for 1 day in air at 450°C before using the material to make up the oxide samples.…”

Formation of Pt and Pd complex oxides using lead oxide and their solubility in hydrochloric acid

“…In this study, in the recycling of PGMs from automotive catalysts, investigated the use of PbO to convert PGMs into complex oxides. PbO is known to form complex oxides (PbPt 2 O 4 , Pb 2 PtO 4 , and PbPdO 2 ) with Pt and Pd (Muller and Roy 1971; Jacob et al 2009). The standard Gibbs energy changes ( ) for PbPt 2 O 4 and Pb 2 PtO 4 have been reported as follows (Jacob et al 2009): …”

“…PbO is known to form complex oxides (PbPt 2 O 4 , Pb 2 PtO 4 , and PbPdO 2 ) with Pt and Pd (Muller and Roy 1971; Jacob et al 2009). The standard Gibbs energy changes ( ) for PbPt 2 O 4 and Pb 2 PtO 4 have been reported as follows (Jacob et al 2009): …”