A method for preparing hard magnetic iron-platinum nanoparticles using inorganic salts as precursors
A nanoparticle and hard magnetic technology, which is applied in the field of preparing hard magnetic iron-platinum nanoparticles, can solve the problems of complex preparation process of hard magnetic L10-FePt nanoparticles, irregular shape of nanoparticles, uncontrollable size, etc., to achieve easy Industrialized production, excellent magnetic properties, and low cost of raw materials
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specific Embodiment approach 1
[0025] Embodiment 1: This embodiment is a method for preparing hard magnetic iron-platinum nanoparticles using inorganic salt as a precursor, specifically according to the following steps:
[0026] 1. Mixing and stirring under protective gas: Add ferrous chloride, potassium chloroplatinate and oleylamine into a three-necked flask, and pass nitrogen gas and exhaust air for 40 minutes under magnetic stirring and room temperature conditions to obtain a mixture; The ratio of the amount of substance of iron and potassium chloroplatinate is 1:(1~1.2); the ratio of the amount of substance of potassium chloroplatinate and oleylamine is 1:(150~160);
[0027] 2. Heating: Heat the mixture prepared in step 1 from room temperature to 200°C at a heating rate of 5°C / min to 10°C / min under the conditions of magnetic stirring and nitrogen protection, and then heat it under magnetic stirring, nitrogen protection and a temperature of 200 Keep warm for 4h~5h at ℃; heat from 200℃ to 350℃ at a heati...
specific Embodiment approach 2
[0035] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the ratio of the amount of ferrous chloride and potassium chloroplatinate described in step 1 is 1:1. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0036] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the ratio of potassium chloroplatinate and oleylamine in step 1 is 1:150. Others are the same as in the first embodiment.
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