Thermodynamic properties of the La 2 O 3 –ZrO 2 system by Knudsen effusion mass spectrometry at high temperature
Rapid Communications in Mass Spectrometry2017Vol. 31(23), pp. 2021–2029
Citations Over TimeTop 13% of 2017 papers
Abstract
According to the XRD results combined with Rietveld refinement of the patterns, 33.3 La2 O3 -66.7 ZrO2 ceramics after solid-state synthesis are composed of well-formed cubic pyrochlore-type La2 Zr2 O7 with 5 wt.% admixture of monoclinic and cubic ZrO2 whereas 33.3 La2 O3 -66.7 ZrO2 precursor powders after cryochemical synthesis correspond to low-crystalline La(OH)3 . The components of the La2 O3 -ZrO2 system evaporate separately: there is no temperature range where lanthanum and zirconium gaseous species are present together. It was found that the activities of lanthania have low negative deviation from the ideal case.
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