A method for preparing ε-phase iron oxide by ball milling
A technology of iron oxide and ball milling method, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, nanotechnology for materials and surface science, etc. It can solve the problems of long reaction time, high price of raw materials, cumbersome and complicated experimental operations, etc. problems, to achieve the effect of simple preparation method, no pollution to the environment and good repeatability
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Embodiment 1
[0022] Embodiment 1 preparation coercive force is the ε-Fe of 11kOe 2 o 3 The Whole Process of Nanoparticles
[0023] Ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), fumed nano-silica, ethanol (C 2 h 5 OH) as raw material. To prepare the nanoparticles, 100 g of grinding balls were first put into a 100 mL ball mill jar as a grinding medium. Then add 0.5gFe(NO 3 ) 3 9H 2 0 and 3g of hydrophilic fumed nano-silica, then put into a certain amount of ethanol solution (2mL) to reduce the grinding resistance. Seal the ball mill jar and grind at room temperature for 8 h. After the reaction is over, take out the sample in the tank after the temperature of the ball mill tank drops to room temperature, dry it for several hours, and anneal it in air at 1000°C for 4 hours. Get the final sample.
[0024] figure 1 Given the ε-Fe prepared under the above conditions 2 o 3 In the XRD pattern of nanoparticles, it can be seen that the diffraction peaks of the sample are consistent...
Embodiment 2
[0026] Example 2 Preparation of ε-Fe with a coercive force of 6.6kOe 2 o 3 The Whole Process of Nanoparticles
[0027] Ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), fumed nano-silica, ethanol (C 2 h 5 OH) as raw material. To prepare the nanoparticles, 100 g of grinding balls were first put into a 100 mL ball mill jar as a grinding medium. Then add 0.3gFe(NO 3 ) 3 9H 2 0 and 3g of hydrophilic fumed nano-silica, then put into a certain amount of ethanol solution (2mL) to reduce the grinding resistance. Seal the ball mill jar and grind at room temperature for 8 h. After the reaction is over, wait until the temperature of the ball mill tank drops to room temperature, and finally take out the sample in the tank and dry it for several hours, then anneal at 1000°C in air for 4 hours. Get the final sample.
[0028] Figure 4 Given the ε-Fe prepared under the above conditions 2 o 3 In the XRD pattern of nanoparticles, it can be seen that the diffraction peaks of the ...
Embodiment 3
[0029] Example 3 Preparation of ε-Fe with a coercive force of 12.5kOe 2 o 3 The Whole Process of Nanoparticles
[0030] Ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), fumed nano-silica, ethanol (C 2 h 5 OH) as raw material. To prepare the nanoparticles, 100 g of grinding balls were first put into a 100 mL milling jar as a grinding medium. Then add 0.7gFe(NO 3 ) 3 9H 20 and 3g of hydrophilic fumed nano-silica, then put into a certain amount of ethanol solution (2mL) to reduce the grinding resistance. Seal the ball mill jar and grind at room temperature for 8 h. After the reaction is over, wait until the temperature of the ball mill tank drops to room temperature, and finally take out the sample in the tank and dry it for several hours, then anneal at 1000°C in air for 4 hours. Get the final sample.
[0031] Image 6 Given the ε-Fe prepared under the above conditions 2 o 3 In the XRD pattern of nanoparticles, it can be seen that the diffraction peaks of the sam...
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