Thermal decomposition of Ce-Sm and Ce-Lu mixed oxalates: Influence of the Sm- and Lu-doped ceria structure
| Autor: | Cristina Artini, Giorgio Costa, Federico Locardi, Marcella Pani, Valentina Caratto, Ilaria Nelli |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Lanthanide
Inorganic chemistry Analytical chemistry 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences Oxalate chemistry.chemical_compound Rare earth oxalates Differential thermal analysis Lanthanides Physical and Theoretical Chemistry Thermal decomposition Instrumentation Structural properties Chemical process of decomposition Rare earth-doped ceria 021001 nanoscience & nanotechnology Condensed Matter Physics Decomposition 0104 chemical sciences Thermogravimetry Differential thermal analysis/thermogravimetric analysis chemistry Rare earth oxalates Rare earth-doped ceria Lanthanides Thermal decomposition Differential thermal analysis/thermogravimetric analysis Structural properties 0210 nano-technology |
| Zdroj: | Thermochimica Acta 651 (2017): 100–107. doi:10.1016/j.tca.2017.03.013 info:cnr-pdr/source/autori:Artini C.; Nelli I.; Pani M.; Costa G.A.; Caratto V.; Locardi F./titolo:Thermal decomposition of Ce-Sm and Ce-Lu mixed oxalates: Influence of the Sm-and Lu-doped ceria structure/doi:10.1016%2Fj.tca.2017.03.013/rivista:Thermochimica Acta/anno:2017/pagina_da:100/pagina_a:107/intervallo_pagine:100–107/volume:651 |
| DOI: | 10.1016/j.tca.2017.03.013 |
| Popis: | The thermal decomposition of the (Ce 1 − x RE x ) 2 (C 2 O 4 ) 3 * n H 2 O oxalates (RE Sm, Lu) has been studied over the whole compositional range by differential thermal analysis coupled to thermogravimetry. The temperature of the anhydrous oxalate → oxide transition results to be driven by two main factors, namely the mean cationic radius of the oxalate, which affects the RE O distances, and the crystal structure of the resulting oxides; the decomposition process is then discussed by taking into account the crystal properties of both compounds. In the Ce-Sm system a slope change appears in the trend of the oxide formation temperature vs. the Sm content at the composition corresponding to the upper limit of the fluorite structure. In the Ce-Lu system the oxalate decomposition of samples with x ranging between 0.4 and 0.8 occurs through a number of steps, in agreement with the polyphasicity of the resulting oxides. |
| Databáze: | OpenAIRE |
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