Synthesis and characterization of the NiAl2O4, CoAl2O4 and ZnAl2O4 spinels by the polymeric precursors method

被引：0

作者：

Gama, L. ^{[1
]}

Ribeiro, M.A. ^{[1
]}

Barros, B.S. ^{[2
]}

Kiminami, R.H.A. ^{[3
]}

Weber, I.T. ^{[4
]}

Costa, A.C.F.M. ^{[1
]}

机构：

[1] Federal University of Campina Grande, Department of Engineering of Materials, Av. Aprígio Veloso 882, 58.109-970 Campina Grande, PB, Brazil

[2] Federal University of Rio Grande do Norte, Department of Chemistry, 59078-970 Natal, RN, Brazil

[3] Federal University of São Carlos, Department of Materials Engineering, 13565-905 São Carlos, SP, Brazil

[4] Federal University of Pernambuco, Department of Fundamental Chemistry, 50670-901 Recife, PEI, Brazil

来源：

Journal of Alloys and Compounds | 2009年 / 483卷 / 1-2期

关键词：

The spinels constitute an important group of materials with great technological appeal; being able to be applied as pigments; refractory; catalysts and electronic ceramics. In this paper; we reported the preparation of nanocrystalline NiAl2O4; CoAl2O4 and ZnAl2O4 phases by Pechini method. This method employs the dissolution of cations precursors in a citric acid aqueous solution. Due to the high chemical homogeneity; cation segregation during thermal decomposition is minimal. The resulting powders were characterized by XRD; N2 adsorption/desorption curves (BET curves) and SEM. The X-ray diffraction patterns show that the synthesis is efficient to produce single-phased NiAl2O4; CoAl2O4 and ZnAl2O4 powders and the crystallite sizes were 12; 34; and; 20; nm; respectively. The micrographs show the formation of soft agglomerates with irregular morphology constituted by the superposition of the quite fine particles. © 2008 Elsevier B.V. All rights reserved;

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摘要：

Journal article (JA)

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页码：453 / 455