Method for preparing lithium ferrite thermal spraying powder used for conductive coating

A technology of lithium ferrite and conductive coating is applied in the field of preparation of lithium ferrite thermal spray powder for conductive coating, and can solve the problem that the conductive performance of lithium ferrite coating cannot meet the electrical performance requirements of grounding materials and the like , to achieve the effect of simple and controllable process and equipment, good electrical conductivity, and reduced voids

Active Publication Date: 2015-11-11
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +5
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In recent years, the methods for preparing ferrite powder include: chemical co-precipitation method, hydrothermal method, sol-gel method and self-propagating method, etc. The ferrite powder prepared by the above method, the lithium iron prepared by thermal spraying The conductivity of ferrite coating is difficult to meet the electrical performance requirements of grounding materials, so it is necessary to provide an improved preparation method of thermal spray powder for lithium ferrite conductive coating

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  • Method for preparing lithium ferrite thermal spraying powder used for conductive coating

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Embodiment 1

[0037] A preparation method of lithium ferrite thermal spray powder for conductive coating, the method comprising the following steps:

[0038] 1) Mixing and shaking: Li 2 CO 3 (99.9% pure) and Fe 2 o 3 (Purity is 99.9%) The powder is dried at 150°C for 3 hours to remove moisture, mixed in a double-stirring mixer with a molar ratio of 1:5, and stirred for 1 hour; the mixed powder is put into a vibrating crusher, Vibrate for 2 minutes under the oscillation condition of frequency and amplitude of 15mm to compact the powder;

[0039]2) Pelletizing and drying: After wetting the raw material powder obtained in step 1) with deionized water as the medium, manually make small balls with a diameter of 5-10mm; then place the obtained small spherical raw material powder in an electric blast In a drying oven, dry at 150°C for 6 hours to fully remove the moisture brought in during the ball forming process;

[0040] 3) Calcination and crushing: put the small spherical powder obtained i...

Embodiment 2

[0046] A preparation method of lithium ferrite thermal spray powder for conductive coating, the method comprising the following steps:

[0047] 1) Mixing and shaking: Li 2 CO 3 (99.9% pure) and Fe 2 o 3 (Purity is 99.9%) The powder is dried at 150°C for 3 hours to remove moisture, mixed in a double-stirring mixer at a molar ratio of 1:5, and stirred for 1.5 hours; the mixed powder is put into a vibrating crusher, and Vibrate for 3 minutes under the vibration condition of 50Hz frequency and 12mm amplitude to compact the powder;

[0048] 2) Pelletizing and drying: After wetting the raw material powder obtained in step 1) with deionized water as the medium, manually make small balls with a diameter of 5-10mm; then place the obtained small spherical raw material powder in an electric blast In a drying oven, dry at 150°C for 7 hours to fully remove the moisture brought in during the ball forming process;

[0049] 3) Calcination and crushing: put the small spherical powder obta...

Embodiment 3

[0055] A preparation method of lithium ferrite thermal spray powder for conductive coating, the method comprising the following steps:

[0056] 1) Mixing and shaking: Li 2 CO 3 (99.9% pure) and Fe 2 o 3 (Purity is 99.9%) The powder is dried at 150°C for 3 hours to remove moisture, mixed in a double mixer mixer at a molar ratio of 1:5, and stirred for 2 hours; the mixed powder is put into a vibrating crusher, Vibrate for 4 minutes under the oscillation condition of frequency and amplitude of 10mm to compact the powder;

[0057] 2) Pelletizing and drying: After wetting the raw material powder obtained in step 1) with deionized water as the medium, manually make small balls with a diameter of 5-10mm; then place the obtained small spherical raw material powder in an electric blast In a drying oven, dry at 150°C for 8 hours to fully remove the moisture brought in during the ball forming process;

[0058] 3) Calcination and crushing: put the small spherical powder obtained in s...

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Abstract

The invention provides a method for preparing lithium ferrite thermal spraying powder used for conductive coating. The method includes the following steps: (1) mixing the materials and jolt-ramming; (2) pelletizing and drying; (3) calcinating and crushing; (4) agglomerating; (5) carrying out spray granulation; (6) carrying out heat treatment. The lithium ferrite thermal spraying powder prepared by using the method provided by the invention is high in crystallinity, good in sphericity retaining capability and fluidity; the lithium ferrite coating prepared by using the thermal spraying powder is good in conductivity, bonding strength and corrosion resistance; the process and device of the invention are simple and controllable, convenient to operate, low in cost, short in production period, and good in repeatability; the powder yield is as high as 75% or above; demands for scale production of thermal spraying powder used for Li0.5Fe2.5O4-x conductive coating are met.

Description

technical field [0001] The invention relates to the technical field of thermal spraying powders, in particular to a preparation method of lithium ferrite thermal spraying powders for conductive coatings. Background technique [0002] Ferrite material with inverse spinel structure has excellent corrosion resistance, and its main component is Fe 2 o 3 , will not produce secondary pollution during use, and can be used as a new generation of environmentally friendly and anti-corrosion electrode materials. In the power industry, the protective coating material of the AC grounding material is not only required to have good corrosion resistance, but also requires good electrical conductivity to ensure the leakage effect. Lithium ferrite (Li 0.5 Fe 2.5 o 4-x ) material has a low resistivity, and has attracted the attention of researchers on corrosion protection of grounding materials in power transmission and transformation projects in recent years. [0003] The rapid developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26
Inventor 祝志祥陈新韩钰马壮柳彦博陈保安张强潘学东王晓芳赵蕊王斌王松杨长龙王佩林
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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