Preparation of γ-fe 2 o 3 Magnetic Nanoparticle Approach
A nanoparticle, 3·9H2O technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high cost, difficult to realize on a large scale, difficult to control, etc., and achieve the production rate. Fast, uniform size, small size effect
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[0017] Carry out according to the previous steps, only change the sintering at 100°C, 150°C, 250°C, 300°C, 350°C, 400°C, and after the sintering, take the product obtained in the crucible for corresponding tests.
[0018] The X-ray diffraction spectrum of the obtained sample is shown in Figure 2, indicating that γ-Fe will be generated at sintering temperatures of 150°C, 200°C, and 250°C 2 o 3 Nanoparticle phase, if the temperature is too low (at 100°C), γ-Fe 2 o 3 No phase formation; if the temperature is too high (300°C, 350°C, 400°C), other phases of Fe will be produced 2 o 3 , resulting in a product that is not a single pure γ-Fe 2 o 3 Mutually.
[0019] It can be seen from the scanning electron microscope observation of the obtained sample, see Figure 3, the SEM photos at different temperatures can be seen, γ-Fe 2 o 3 When the sintering temperature of nanoparticles is 150°C [figure (b)], 200°C [figure (c)], and 250°C [figure (d)], the obtained particle size is rela...
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