Combustion synthesis of Ni-Zn ferrite powder-influence of oxygen balance value
- Department of Applied Chemistry, Chung Cheng Institute of Technology, National Defence University, Number 190, Sanyuan First Street, Tashi Jen, Taoyuan 33509, Taiwan (China)
- Department of Materials Science and Engineering, National Chao Tung University, Hsinchu 300, Taiwan (China)
In this study, Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} powder was synthesized via an exothermic reaction between nitrates [Ni(NO{sub 3}){sub 2}.6H{sub 2}O, Zn(NO{sub 3}){sub 2}.6H{sub 2}O, Fe(NO{sub 3}){sub 3}.9H{sub 2}O, and NH{sub 4}NO{sub 3}] and glycine [NH{sub 2}CH{sub 2}COOH]. 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{sub 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.
- OSTI ID:
- 20721710
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 1; Other Information: DOI: 10.1016/j.jssc.2004.10.045; PII: S0022-4596(04)00573-0; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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