Published 1994 | Version v1
Miscellaneous Metadata-only

Preparation of lanthanum, neodymium and samarium oxides by thermal decomposition of oxalate salts

Creators

  • 1. Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

Description

The results of an evaluation of some physical characteristics of lanthanum, neodymium and samarium oxides obtained by drying and calcination of oxalates were reported. The influence of temperature and time of calcination has also been investigated. The thermal decomposition of the oxalates has been examined using thermogravimetric analysis. The products were characterized by X-ray diffraction, scanning electron microscopy, determination of granulometric distribution and carbon contents analysis. It has been found that the effect of the conditions of calcination in the product's characteristics is greater for compounds of lanthanum, since the particles could be disintegrated during this treatment. This effect is smaller for neodymium and samarium compounds. (author). 3 refs, 4 figs, 1 tab

Part of:
Proceedings of the 38. Brazilian Congress on Ceramics; 2. Meeting of Miners and Consumers. v. 1

Additional details

Additional titles

Original title (Portuguese)
Obtencao de oxidos de lantanio, neodimio e samario por decomposicao termica de oxalatos

Publishing Information

Imprint Title
Proceedings of the 38. Brazilian Congress on Ceramics; 2. Meeting of Miners and Consumers. v. 1
Imprint Pagination
492 p.
Journal Page Range
p. 360-365.

Conference

Title
38. Brazilian Congress on Ceramics; 2. Meeting of Miners and Consumers.
Dates
18-21 Jun 1994.
Place
Blumenau, SC (Brazil).

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
26036588
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
CALCINATION; DEHYDRATION; LANTHANUM OXIDES; NEODYMIUM OXIDES; OXALATES; PARTICLE SIZE; POWDERS; SAMARIUM OXIDES; SCANNING ELECTRON MICROSCOPY; TEMPERATURE DEPENDENCE; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION
Descriptors DEC
CARBOXYLIC ACID SALTS; CHALCOGENIDES; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; COHERENT SCATTERING; DECOMPOSITION; DIFFRACTION; ELECTRON MICROSCOPY; GRAVIMETRIC ANALYSIS; LANTHANUM COMPOUNDS; MICROSCOPY; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PYROLYSIS; QUANTITATIVE CHEMICAL ANALYSIS; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SCATTERING; SIZE; THERMAL ANALYSIS

Optional Information

Notes
Imprint:Anais do 38. Congresso Brasileiro de Ceramica; 2. Encontro de Mineradores e Consumidores. v. 1.