Thermogravimetric analysis coupled with IR spectroscopy was used to investigate the thermal stability and decomposition products of N,N-dialkylcarbamates of zirconium(IV), hafnium(IV), and niobium(IV), M(O2CNR2)4. The niobium derivatives were less stable than the corresponding Zr(IV) and Hf(IV) derivatives, and the thermal stability was in the order of R = Et > iPr > Me. XRD analysis of the residue showed the formation of the oxides ZrO2 (tetragonal, P4 2 /nmc), HfO2, (monoclinic, P2 1/c), and Nb2O5 (orthorhombic, Pbam). TEM analysis showed that all the oxides were obtained as nanopowders with a crystal size below 30 nm.

Thermal decomposition of metal N,N-dialkylcarbamates

PICCINELLI, FABIO;
2016-01-01

Abstract

Thermogravimetric analysis coupled with IR spectroscopy was used to investigate the thermal stability and decomposition products of N,N-dialkylcarbamates of zirconium(IV), hafnium(IV), and niobium(IV), M(O2CNR2)4. The niobium derivatives were less stable than the corresponding Zr(IV) and Hf(IV) derivatives, and the thermal stability was in the order of R = Et > iPr > Me. XRD analysis of the residue showed the formation of the oxides ZrO2 (tetragonal, P4 2 /nmc), HfO2, (monoclinic, P2 1/c), and Nb2O5 (orthorhombic, Pbam). TEM analysis showed that all the oxides were obtained as nanopowders with a crystal size below 30 nm.
2016
IR spectroscopy; Metal N,N-dialkylcarbamates; Nanopowders
File in questo prodotto:
File Dimensione Formato  
J Therm An Cal(2016).pdf

solo utenti autorizzati

Licenza: Accesso ristretto
Dimensione 1.12 MB
Formato Adobe PDF
1.12 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/955446
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact