Artigo
Thermal decomposition of the hydrated basic carbonates of lanthanides and yttrium
Registro en:
Thermochimica Acta. Amsterdam: Elsevier B.V., v. 137, n. 2, p. 319-330, 1989.
0040-6031
10.1016/0040-6031(89)87224-7
WOS:A1989R792900016
2-s2.0-0001733703
8460531302083773
Autor
D'Assunção, L.Moscardini
Giolito, I.
Ionashiro, Massao [UNESP]
Resumen
Thermogravimetry, differential thermal analysis, differential scanning calorimetry, IR absorption spectroscopy, X-ray diffraction, and other methods of analysis have been used in the characterization and study of the thermal decomposition of the basic carbonate hydrates of lanthanides and yttrium. These compounds were obtained by precipitation from homogeneous solutions via the hydrolysis of urea, without the addition of an auxiliary anion. The results show that the TG and DTA curves are characteristic for each compound. The results also permit suggestions concerning the compositions and mechanisms of thermal decomposition of these compounds. © 1989. UNIV SAO PAULO,INST QUIM,CP 20780,CEP,BR-01498 SAO PAULO,SP,BRAZIL FUNDACAO ENSINO & TECNOL,FAC CIENCIAS AGR,ALFENAS,MG,BRAZIL UNIV ESTADUAL PAULISTA,INST QUIM,ARARAQUARA,SP,BRAZIL UNIV ESTADUAL PAULISTA,INST QUIM,ARARAQUARA,SP,BRAZIL