✍ Scribed by Arkadij Popovič; Barbara Malič; Laszlo Bencze
No coin nor oath required. For personal study only.
Knudsen effusion mass spectrometry (KEMS) was used for direct determination of lead oxide activity as a function of temperature in various regions of the PbOÀZrO 2 ÀTiO 2 system. From the results, the enthalpy, Gibbs free energy and entropy of formation of PbTiO 3 (PT), PbZrO 3 (PZ) and Pb(Zr,Ti)O 3 (PZT) were evaluated. In addition, the single phase widths of Pb(Zr 0.5 Ti 0.5 )O 3 and PbTiO 3 perovskite structures were determined at 1100 K. The reaction rate of PZT synthesis in vacuo was followed by direct measurement of the change of PbO activity with time. Lead oxide activity in stoichiometric Pb(Zr 0.5 Ti 0.5 )O 3 , PbTiO 3 and Pb 0.968 (Zr 0.5 Ti 0.5 )O 2.968 (3% lead deficient) at 850 °C was found to be 0.40, 0.45 and 0.1, respectively. PZT, PT and PZ powder samples prepared by a solid state procedure were also measured, all revealing lead deficiency.
📜 SIMILAR VOLUMES
Secondary ion mass spectrometry (SIMS) was used to analyse the formation mechanism of IrO,/ZrO, film electrodes. The coating mixtures with compositions 20% Ir+80% Zr and 50% Ir+50% Zr prepared on titanium supports from alcoholic solutions of IrCl3.3H2O and Zr0C1,.8H20 precursors were heated to speci
extended metastable solid solutions by grinding has been Solid solution formation induced by dry ball-milling under well demonstrated in metallic systems ( ), but has just an argon atmosphere has been investigated in binary mixtures begun to be investigated in oxide systems. from the TiO 2 -SnO 2 -