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Method for rapidly preparing manganese-cobalt spinel coating through microwave mixed heating

A spinel coating and microwave technology, which is applied to fuel cells, electrochemical generators, electrical components, etc., can solve the problems of uncontrollable manganese-cobalt spinel coating composition, complicated preparation process, and base metal oxidation, etc. Achieve the effects of precise and controllable coating composition, simple preparation process and fast heating rate

Pending Publication Date: 2021-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of uncontrollable composition, cumbersome preparation process, long time consumption, high cost and serious oxidation of base metal when preparing manganese-cobalt spinel coating by traditional technology, and provide a fast, efficient, low-cost, composition Controllable Manganese-Cobalt Spinel Coating Preparation Method

Method used

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  • Method for rapidly preparing manganese-cobalt spinel coating through microwave mixed heating
  • Method for rapidly preparing manganese-cobalt spinel coating through microwave mixed heating
  • Method for rapidly preparing manganese-cobalt spinel coating through microwave mixed heating

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specific Embodiment approach 1

[0021] Specific Embodiment 1: In this embodiment, the method for rapidly preparing manganese-cobalt spinel coating by microwave mixing and heating is implemented according to the following steps:

[0022] 1. Weigh Co powder, MnO 2 Powder and sintering aid powder as raw materials;

[0023] 2. Put the raw materials in step 1 into a ball mill tank for wet ball milling, add absolute ethanol, mix evenly, dry and sieve to obtain a mixed powder;

[0024] 3. Surface treatment of ferritic stainless steel, after sandpaper grinding and ultrasonic cleaning, clean ferritic stainless steel is obtained;

[0025] 4. Evenly smear the mixed powder obtained in step 2 on the surface of clean ferritic stainless steel with a thickness of 50-150 μm, and then place it in a graphite mold for compression molding to obtain stainless steel with a pre-pressed coating;

[0026] 5. Embed the stainless steel with pre-pressed coating in step 4 into the high microwave absorption rate powder in the microwave ...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, Co powder, MnO 2 The average particle diameter of the powder is 0.5-5 μm.

[0031] In this embodiment, Co powder and MnO 2 The purity of the powder is above 99.9%. Co powder and MnO 2 The powder is spherical or nearly spherical.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the Co powder and MnO in step one 2 The amount ratio of powder substance is 1:1 or 1:2.

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Abstract

The invention discloses a method for rapidly preparing a manganese-cobalt spinel coating through microwave mixed heating, relates to the technical field of microwave processing and metal surface modification, and aims at solving the problems that components are uncontrollable, the preparation process is tedious, base metal is seriously oxidized and the like when the manganese-cobalt spinel coating is prepared through a traditional technology. The method for preparing the manganese-cobalt spinel coating comprises the following steps: 1, weighing Co powder, MnO2 powder and sintering aid powder as raw materials; 2, placing the raw materials in a ball-milling tank for wet ball-milling treatment; 3, carrying out surface treatment on the ferritic stainless steel; 4, evenly smearing the mixed powder on the surface of the ferritic stainless steel, and performing compression molding; and 5, imbedding the stainless steel attached with the prepressing coating in the high-microwave-absorptivity powder in the microwave sintering furnace, and performing sintering and heat preservation in the air atmosphere. The manganese-cobalt spinel protective layer is prepared by adopting a microwave mixed heating method, the heating rate is high, the heating efficiency is high, the sintering temperature is greatly reduced, the sintering time is shortened, overall uniform heating is realized, and the internal stress of the coating is small.

Description

technical field [0001] The invention relates to the technical field of microwave processing and metal surface modification, in particular to a method for preparing a manganese-cobalt spinel coating by microwave mixing and heating. Background technique [0002] A solid fuel cell is a device that directly converts chemical energy in fuels such as hydrogen and methane into electrical energy through electrochemical reactions. On the one hand, the fuel cell is not limited by the Carnot cycle effect, the theoretical efficiency can reach 85% to 90%, and the efficiency in practical application is also more than 50%; on the other hand, the fuel cell uses clean fuel and oxygen as the reaction gas, and the product for H 2 O, and because there are no mechanical transmission parts, there is no air and noise pollution. Therefore, fuel cells have the characteristics of high power generation efficiency, low pollution, and low noise, and have become a clean energy technology widely studied...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C04B35/65H01M8/2465
CPCC04B35/01C04B35/62222C04B35/65H01M8/2465C04B2235/3267C04B2235/405C04B2235/6583C04B2235/667C04B2235/763Y02E60/50
Inventor 司晓庆苏毅曹健高建伟李淳亓钧雷冯吉才
Owner HARBIN INST OF TECH
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