Low temperature synthesis of spherical lanthanum aluminate nanoparticles

被引:40
作者
Behera, SK [1 ]
Sahu, PK [1 ]
Pratihar, SK [1 ]
Bhattacharyya, S [1 ]
机构
[1] Natl Inst Technol, Dept Ceram Engn, Rourkela 769008, India
关键词
lanthanum aluminate; gel-precipitation; ultrasonication; nanoparticles;
D O I
10.1016/j.matlet.2004.07.020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Lanthanum aluminate powders could be prepared by a novel ultrasonic assisted combined gel synthesis from metal chloride solutions with ammonia destabilization. The decomposition and crystallization behavior of the gel was studied by DTA/TGA. The washed and powdered gel was calcined at different temperatures and the phase evolution was studies by X-ray diffractometry. Phase pure lanthanurn aluminate was obtained for powders calcined at a temperature as low as 600 degreesC for 4 h. NMR studies confirmed that the Al in the powders were octahedrally coordinated. SEM study revealed that the powders were uniformly distributed with occasional primary agglomerates. TEM micrographs show that the powders were spherical nanoparticles with sizes in the range of 25-40 nm. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:3710 / 3715
页数:6
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