Combustion synthesis of Ni-Zn ferrite powder - influence of oxygen balance value

被引：77
作者：
Hwang, CC
Tsai, JS
Huang, TH
Peng, CH
Chen, SY
机构：
[1] Natl Def Univ, Chung Cheng Inst Technol, Dept Appl Chem, Taoyuan 33509, Taiwan
[2] Natl Chao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2005年 / 178卷 / 01期
关键词：
combustion synthesis; nanocrystalline; oxygen balance; nitrates; glycine;
D O I：
10.1016/j.jssc.2004.10.045
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
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.
引用
收藏
页码：382 / 389
页数：8
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