標題: Combustion synthesis of Ni-Zn ferrite powder - influence of oxygen balance value
作者: Hwang, CC
Tsai, JS
Huang, TH
Peng, CH
Chen, SY
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: combustion synthesis;nanocrystalline;oxygen balance;nitrates;glycine
公開日期: 1-Jan-2005
摘要: In this study, Ni0.5Zn0.5FC2O4 powder was synthesized via an exothermic reaction between nitrates [Ni(NO3)(2).6H(2)O, Zn(NO3)(2).6H(2)O, Fe(NO3)(3).9H(2)O, and NH4NO3] and glycine [NH2CH2COOH]. By adjusting the glycine-to-nitrates ratio, the oxygen balance (OB) values of the reactant mixtures can be varied in which the combustion phenomena is altered and thereby the as-synthesized products with different characteristics are obtained. An interpretation based on the measurement of maximum combustion temperature (T-c) and the amounts of gas evolved during reaction for various OB values has been proposed regarding the nature of combustion and its correlation with the characteristics of as-synthesized products. After instrumental analyses, it is shown that the as-synthesized powders are nanoscale crystallites with a large specific surface area and they inherit a superparamagnetic behavior. (C) 2004 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jssc.2004.10.045
http://hdl.handle.net/11536/25426
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2004.10.045
期刊: JOURNAL OF SOLID STATE CHEMISTRY
Volume: 178
Issue: 1
起始頁: 382
結束頁: 389
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