ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The combustion method has been employed to produce homogeneous, single phased mixed rare-earth oxides in Ce1 − xPrxO2−y system for x ranging from 0 to 0.7. A cubic fluorite structure is formed for the compositions 0 ≤ x ≤ 0.7, while for x 〉 0.7 mixed phases are obtained. The mixed oxides are formed at the furnace temperature of 500 °C in a short duration of 10 min. In view of the importance of these powders in catalysis, crystallite size, surface area and porosity measurements have been carried out. The crystallite size of the powders increases with x while the surface area decreases. As the temperature is increased to 850 °C, the surface area decreases and the effect is much pronounced in cerium rich oxides. The powders on calcination above 900 °C in air results in the demixing of Ce and Pr to give two fluorite phases.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004459024431
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