Determination of standard enthalpies of formation of member oxides in the Pb system

この論文をさがす

説明

Abstract The heats of solution of four kinds of superconducting oxides, (Pb, Cu) (La, Sr) 2 CuO y (Pb−1201), (Pb, Cu)Sr 2 (Y, Ca)Cu 2 O y (Pb-1212), (Pb 2 , Cu) (La, Sr) 2 CuO y (Pb-3201), (Pb 2 , Cu)Sr 2 (Y, Ca)Cu 2 O y (Pb-3212), and their related oxides in the Pb system were determined by means of a multicalorimeter, and the heats of formation Δ H of complex oxides from reference simple oxides were calculated. The enthalpies of formation Δ f H O were also calculated. The heats of formation in terms of mole of atoms, Δ H R , were calculated by dividing Δ H by v , the number of atoms in a formula unit, and the chemical stability of each complex oxide was discussed. It was found that the 120 and 1212 phases treated in high oxygen pressure are stable, whereas the 3201 and 3212 phases are less stable than the former two.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ