A method for improving the agglomeration of bismuth-iron-titanium oxide nanopowders
A nano-powder and oxide technology, which is applied in the direction of iron compounds, chemical instruments and methods, nanotechnology, etc., can solve the problem of improving agglomeration, difficult to inhibit the agglomeration of powder particles, and expand the distance between grains, so as to improve the problem of agglomeration , good monodispersity, improve the effect of agglomeration
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Embodiment 1
[0053] 1.1 Sample preparation:
[0054] Provide mass concentration and be 0.39% acetic acid solution 50mL (concentration is the acetic acid of 98% and water are prepared by volume ratio 4:1000), slowly add the Bi prepared by co-precipitation method while stirring. 7 Fe 3 Ti 3 o 21 Nano powder 0.1g, to obtain a suspension; the resulting suspension was sealed and magnetically stirred at a low speed at a speed of 200r / min for 3h to obtain a mixed solution; the resulting mixed solution was placed in an ultrasonic disperser for ultrasonic dispersion for 1 hour (60W, 50KHz , 28°C) to obtain a dispersion; the resulting dispersion was centrifuged at a high speed of 10000r / min, and then washed with deionized water until the pH was about 7 to remove the supernatant to obtain a solid washing; the resulting solid washing was placed in 50mL of deionized water was mixed evenly, and then freeze-dried. After sublimation of ice cubes, Bi with good monodispersity and significantly reduced ag...
Embodiment 2
[0063] Carry out according to the dispersing method of embodiment 1, difference is, the concentration of acetic acid solution is 1.92% (concentration is 98% acetic acid and water prepare by volume ratio 20:1000).
[0064] Carry out X-ray diffraction test to sample according to the characterization method of embodiment 1, the result shows, before and after dispersion treatment, the X-ray collection of samples of sample is all consistent with standard collection of collections, and thing is relatively pure, proves that dispersion treatment of the present invention does not change and Destroy Bi 7 Fe 3 Ti 3 o 21 Crystal structure of nanoparticles.
[0065] Scanning electron microscopy (SEM) test is carried out to sample according to the characterization method of embodiment 1, and the result shows, after implementing dispersion method of the present invention to handle, obtained Bi 7 Fe 3 Ti 3 o 21 In the nanopowder, the phenomenon of particle agglomeration has been signif...
Embodiment 3
[0067] Carry out according to the dispersing method of embodiment 1, difference is that acetic acid solution is replaced by hydrochloric acid solution.
[0068] Carry out X-ray diffraction test to sample according to the characterization method of embodiment 1, the result shows, before and after dispersion treatment, the X-ray collection of samples of sample is all consistent with standard collection of collections, and thing is relatively pure, proves that dispersion treatment of the present invention does not change and Destroy Bi 7 Fe 3 Ti 3 o 21 Crystal structure of nanoparticles.
[0069] Scanning electron microscopy (SEM) test is carried out to sample according to the characterization method of embodiment 1, and the result shows, after implementing dispersion method of the present invention to handle, obtained Bi 7 Fe 3 Ti 3 o 21 In the nanopowder, the phenomenon of particle agglomeration has been significantly improved, and the crystal grains with a size of about...
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