Process for synthesizing the nanometer Fe3O4 magnetic powder body with indoor temperature solid phase method

A technology of ferroferric oxide and magnetic powder, which is applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc. It can solve the problems of large grain size, lattice, distortion, etc., and achieve low production cost and high speed. The effect of fast and short preparation cycle

Inactive Publication Date: 2007-08-15
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not involve Fe 3 o 4 The preparation is only the physical refinement of large particles, and due to strong plastic deformation, it will cause Fe 3 o 4 Granular grains have large lattice distortion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of method for preparing magnetic iron ferric oxide material: 0.50mol (100.0g) ferrous chloride tetrahydrate and 0.93mol (251.6g) ferric chloride hexahydrate are mixed, add 14.3mol (572.0g) Sodium hydroxide and oleic acid 46.2g. The above materials were fully reacted, mixed and ground in a planetary ball mill for 0.5 hour, the rotating speed of the ball mill was 400rpm, and the spherical tank and balls were made of stainless steel. Take it out and wash it several times with distilled water, and dry the solid material at 110°C. The obtained magnetic ferroferric oxide material is black powder, identified as a pure phase by X-ray diffraction, and has a particle size of 20-50 nm.

Embodiment 2

[0024] Embodiment 2: A kind of method for preparing magnetic iron ferric oxide material: 3.47mol (1000.0g) ferrous nitrate hexahydrate and 6.25mol (2525.0g) ferric nitrate nonahydrate are mixed, add 38.9mol (2177.3g) hydroxide Potassium, 570.2g potassium nitrate and 57.0g polyethylene glycol. The above materials were fully reacted, mixed, and ground in a planetary ball mill for 24 hours, the rotational speed of the ball mill was 400 rpm, and the spherical tank and balls were made of stainless steel. Take it out and wash it several times with distilled water, and dry the solid material at 110°C. The obtained magnetic ferroferric oxide material is black powder, identified as a pure phase by X-ray diffraction, and has a particle size of 15-40 nm.

Embodiment 3

[0025] Embodiment three: a kind of method for preparing magnetic iron ferric oxide material: 1.44mol (400.0g) ferrous sulfate heptahydrate and 1.30mol (730.6g) ferric sulfate nonahydrate are mixed, add 24.2mol (1357.4g) hydroxide Potassium, 124.4g potassium sulfate and 24.9g sodium lauryl sulfate. The above materials were fully reacted, mixed and ground in a planetary ball mill for 4.0 hours, the rotating speed of the ball mill was 400rpm, and the spherical pot and the balls were made of agate. Take it out and wash it several times with distilled water, and dry the solid material at 110°C. The obtained magnetic ferroferric oxide material is a black powder, identified as a pure phase by X-ray diffraction, and the particle size is <100nm.

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Abstract

The provided preparation method for nano Fe3O4 magnetic powdery material comprises: 1. mixing solid Fe2+ material, Fe3+ material by mole ratio as 1:1.8~1:2; 2. adding solid strong base with mole number as 4~10 times to iron salt, as well as 0~10% dispersant and 0~5% surface protectant; 3. holding mixed material at room temperature, grinding in sealed tank for 0.5~14h; and 4. cleaning, separating and drying to obtain target product with advantages of even grain, adequate quality and no impurity phase. This invention is simple and low cost.

Description

technical field [0001] The invention relates to a preparation process of ferroferric oxide magnetic powder, in particular to a process for synthesizing nanometer ferroferric oxide magnetic powder by a solid-phase method at room temperature. Background technique [0002] Nanoscale Fe 3 o 4 It has attractive application prospects in the fields of high-density magnetic recording materials, gas-humidity sensing devices, MRI contrast imaging, and drug controlled release due to its remarkable magnetic and gas-humidity-sensing properties, and is expected to replace the traditional micron-sized Fe 3 o 4 , and are widely used in conductive magnetic particles, magnetic fluids, biomedical materials, and catalyst carriers. [0003] Nano Fe 3 o 4 The preparation methods of particles include oxidation precipitation method, hydrothermal method, forced hydrolysis method, gel-sol method, colloid chemical method, hydrosol-extraction method, microemulsion method, ultrasonic precipitation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/06H01F41/02C04B35/622
Inventor 贾永忠孙进贺景燕姚颖
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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