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- W2389318799 abstract "Ni0.25Cu0.25Zn0.5Fe2O4/SiO2 nanocomposites were prepared by sol-gel method using tetraethylorthosilicate and nitrates as raw material. The changes of xerogel during heat treatment were studied by TGA-DTA and the structure,grain size and magnetic properties of the samples were investigated by XRD,TEM and VSM. The results show that with the increase of calcining temperature,the Hc and Ms of the nanocomposites increase at first and then decrease because of the crystallization of the silica matrix at high temperature. The particle size of Ni0.25 Cu0.25Zn0.5Fe2O4 in the samples is about 30 nm,the Ms is 50 Am2·kg–1,and the Hc is 4.22 kA·m–1 after calcining at 900 ℃." @default.
- W2389318799 created "2016-06-24" @default.
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- W2389318799 date "2008-01-01" @default.
- W2389318799 modified "2023-09-22" @default.
- W2389318799 title "Structure and magnetic properties of NiCuZn ferrite/SiO_2 nanocomposites" @default.
- W2389318799 hasPublicationYear "2008" @default.
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