Abstract
The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.
Original language | English |
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Journal | Thermochimica Acta |
Volume | 612 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
ISSN | 0040-6031 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Caproate
- FTIR
- Lanthanum
- Simultaneous TG-DTA
- Thermal decomposition
- Valerate
- Decomposition
- Differential thermal analysis
- Ketones
- Pyrolysis
- X ray diffraction
- Hot-stage microscopy
- Intermediate product
- Lanthanum(III)
- Synchrotron source