Preparing method of high saturation magnetization strength Mn0.8Zn0.2Fe2O4 nanoparticles and magnetic liquid of nanoparticles
A nanoparticle and magnetization technology, applied in magnetic liquids, magnetic objects, chemical instruments and methods, etc., can solve the problem that the magnetic liquid cannot meet the requirements of high saturation magnetization, and the saturation magnetization of manganese-zinc ferrite nano-magnetic particles is low. and other problems, to achieve the effect of low coercivity, low equipment requirements, and simple preparation process
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[0022] Example 1:
[0023] A high saturation magnetization Mn 0.8 Zn 0.2 Fe 2 O 4 The preparation method of nanoparticles includes the following steps:
[0024] A. Massage per ratio (0.8:0.2:2) to weigh MnCl 2 ·4H 2 O, ZnCl 2 , FeCl 3 ·4H 2 O salt was placed in 500ml of ultrapure water at 85°C, stirred until it was completely dissolved, and then poured into a reactor at a temperature of 85°C. Weigh 25g of NaOH powder, dissolve it in ultrapure water, and then quickly add it to the reaction kettle while vigorously mechanically stirring the mixture at a stirring speed of 800r / min and a stirring time of 60min.
[0025] B. Put the mixture obtained in A into a high-temperature oven for heat preservation, the temperature is 200℃, and the heat preservation time is 4h, and the high temperature is used to promote the crystallization and growth of the particles.
[0026] C. Wash and cool the mixed solution obtained from B to 70°C, adjust its pH to 6.23, add a suitable surfactant fluoroether acid...
Example Embodiment
[0029] Example 2:
[0030] A high saturation magnetization Mn 0.8 Zn 0.2 Fe 2 O 4 The preparation method of nanoparticles includes the following steps:
[0031] A. Massage per ratio (0.8:0.2:2) to weigh MnCl 2 ·4H 2 O, ZnCl 2 , FeCl 3 ·4H 2 O salt was placed in 500ml of ultrapure water at 85°C, stirred until it was completely dissolved, and then poured into a reactor at a temperature of 85°C. Weigh 28g of NaOH powder, dissolve it in ultrapure water, and then quickly add it to the reaction kettle while vigorously mechanically stirring the mixture at a stirring speed of 800r / min and a stirring time of 60min.
[0032] B. Put the mixture obtained in A into a high-temperature oven for heat preservation, the temperature is 80℃, and the heat preservation time is 4h, and the high temperature is used to promote the crystallization and growth of the particles.
[0033] C. Wash and cool the mixed solution obtained from B to 70°C and adjust its pH to 5.1. Add a suitable surfactant fluoroether aci...
Example Embodiment
[0036] Example 3:
[0037] A high saturation magnetization Mn 0.8 Zn 0.2 Fe 2 O 4 The preparation method of nanoparticles includes the following steps:
[0038] A. Massage per ratio (0.8:0.2:2) to weigh MnCl 2 ·4H 2 O, ZnCl 2 , FeCl 3 ·4H 2 O salt is placed in 500ml of ultrapure water at 85°C, stirred until it is completely dissolved, and then poured into a reactor at a temperature of 85°C. Weigh 32g of NaOH powder, dissolve it in ultrapure water, and then quickly add it to the reaction kettle while vigorously mechanically stirring the mixture at a stirring speed of 800r / min and a stirring time of 60min.
[0039] B. Put the mixture liquid obtained in A into a high-temperature oven for heat preservation, the temperature is 250℃, and the heat preservation time is 3h, and the high temperature is used to promote the crystallization and growth of the particles.
[0040] C. Wash and cool the mixed solution obtained in B to 70°C, adjust its pH to 6.96, add a suitable surfactant fluoroether a...
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