Published 1981
| Version v1
Miscellaneous
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Thermodynamic analysis of reduction reactions of niobium oxides
Creators
- 1. Sao Paulo Univ. (Brazil). Escola Politecnica
- 2. Universidade Estadual de Campinas (Brazil). Inst. de Fisica
- 3. Fundacao de Tecnologia Industrial, Rio de Janeiro (Brazil)
Description
Reduction processes of niobium oxides by hydrogen, carbon and aluminium are analysed thermodinamically. It is shown that reduction by hydrogen is not technically feasible. High purity of raw materials is required. In the carbothermic process impurities which react to form high stability carbides should be avoided. (Author)
Availability note (English)
MF available from INIS under the Report Number.Abstract (Portuguese)
Os processos alternativos de obtencao de niobio bruto a partir de seus oxidos (reducao por hidrogenio, por aluminio e por carbono) sao analisados sob ponto de vista termodinamico. A analise indica que a reducao por hidrogenio e praticamente inviavel. Para o controle das contaminacoes no produto reduzido ha necessidade de pureza elevada das materias primas. Na reducao carbotermica deve-se evitar componentes que sao mais fortes formadores de carbonetos que o Nb. (Autor)Files
14716755.pdf
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Additional details
Additional titles
- Original title (Portuguese)
- Analise termodinamica das reacoes de reducao de oxidos de niobio
Publishing Information
- Imprint Pagination
- 16 p.
- Report number
- INIS-mf--7613
Conference
- Title
- 36. Annual Congress of ABM.
- Dates
- 5 - 10 Jul 1981.
- Place
- Recife (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 14716755
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- IMPURITIES; NIOBIUM OXIDES; REDUCTION; THERMODYNAMICS
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; NIOBIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS