期刊
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
卷 23, 期 4, 页码 531-538出版社
BRAZILIAN SOC CHEMICAL ENG
DOI: 10.1590/S0104-66322006000400011
关键词
thermal decomposition; thermal analysis; infrared; niobium complex
The thermal decomposition in argon of the morrohydrated ammonium tris(oxalate)niobate, (NH4)(3)NbO(C2O4)(3).H2O, has been studied by TG/DTG, DTA, DSC, IR absorption and XRD. The material decomposes stepwise by the release of CO, CO2, NH3 and water. The atomic structure of the complex. initially becomes amorphous and then crystallizes twice in the form of orthorhombic and monoclinic niobium pentoxide.
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