Superparamagnetic gama-Fe2O3/SiO2 nano-composite material and preparation method thereof

Superparamagnetic gama-Fe2O3/SiO2 nano-composite material and preparation method thereof

The invention discloses a superparamagnetic gama-Fe2O3/SiO2 nano-composite material and a preparation method thereof. The preparation method comprises the following steps of: slowly adding prepared Fe2O3 sol to SiO2 sol; continuously stirring to form Fe2O3/SiO2 nano-composite sol; aging the prepared...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GUAN FEIFEI, YAO LANFANG
Format: Patent
Sprache:chi ; eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS THEREOF
ELECTRICITY
INDUCTANCES
INORGANIC CHEMISTRY
MAGNETS
METALLURGY
NON-METALLIC ELEMENTS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Beschreibung
Zusammenfassung:The invention discloses a superparamagnetic gama-Fe2O3/SiO2 nano-composite material and a preparation method thereof. The preparation method comprises the following steps of: slowly adding prepared Fe2O3 sol to SiO2 sol; continuously stirring to form Fe2O3/SiO2 nano-composite sol; aging the prepared Fe2O3/SiO2 nano-composite sol for a period of time; adding a certain proportion of surface agent CTAB to prepare new Fe2O3/SiO2 nano-composite sol; then, aging the sol into gel; and finally, thermally processing the Fe2O3/SiO2 nano-composite gel at 700 DEG C to prepare a gama-Fe2O3/SiO2 nano-composite material with favorable superparamagnetism, evener particle distribution and even particle size. Because the surface agent CTAB is added in the preparation process, the superparamagnetic gama-Fe2O3/SiO2 nano-composite material presents obvious superparamagnetism, evener particle distribution and even particle size.