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Method for preparing Gamma-Fe2O3 magnetic material by using abandoned toner cartridge

A magnetic material, -fe2o3 technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of long production cycle, reduced production cost, high cost, low preparation cost and short production cycle , the effect of simple process

Inactive Publication Date: 2016-05-04
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic production of magnetic γ-Fe 2 o 3 The methods mainly include co-precipitation method, chemical vapor deposition method, non-aqueous medium synthesis method, hydrothermal method, microemulsion method and high-temperature ball milling method, etc., but these preparation methods generally have the disadvantages of high cost, cumbersome purification process, and long production cycle. , and the method of the present invention has not only overcome these shortcomings, but also can turn waste into treasure, and use waste toner cartridge toner as raw material, can make product production cost greatly reduce, and the particle that obtains is fine, uniform, and particle diameter only has about 200nm, has strengthened The market competitiveness of the product is γ-Fe 2 o 3 The preparation of magnetic powder provides a simple and fast method

Method used

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  • Method for preparing Gamma-Fe2O3 magnetic material by using abandoned toner cartridge
  • Method for preparing Gamma-Fe2O3 magnetic material by using abandoned toner cartridge
  • Method for preparing Gamma-Fe2O3 magnetic material by using abandoned toner cartridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A. Put the waste toner cartridge in the waste toner cartridge crushing magnetic separation device, and collect the black waste toner after crushing, magnetic separation, wind separation and other procedures;

[0020] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0021] C. Fully mix the organic toner and the organic solvent acetone at a mass ratio of 1:2, vibrate and centrifuge to obtain a black precipitate, and dry the precipitate at 60°C;

[0022] D. Subsequently, the dried precipitate is placed in a muffle furnace, calcined at 300°C for 4 hours, and cooled to room temperature to obtain γ-Fe 2 o 3 magnetic material;

[0023] E. At 55~60°C, the supernatant after centrifugation is distilled to recover acetone.

Embodiment 2

[0025] A. Put the waste toner cartridge in the waste toner cartridge crushing magnetic separation device, and collect the black waste toner after crushing, magnetic separation, wind separation and other procedures;

[0026] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0027] C. Fully mix the organic toner and the organic solvent ethyl acetate according to the mass ratio of 1:3, shake and centrifuge to obtain a black precipitate, and dry the precipitate at 70°C;

[0028] D. Subsequently, the dried precipitate is placed in a muffle furnace, calcined at a temperature of 400°C for 2 hours, and cooled to room temperature to obtain γ-Fe 2 o 3 magnetic material.

[0029] E. At 75~80°C, the supernatant after centrifugation is distilled to recover ethyl acetate.

Embodiment 3

[0031] A. Put the waste toner cartridge in the waste toner cartridge crushing magnetic separation device, and collect the black waste toner after crushing, magnetic separation, wind separation and other procedures;

[0032] B. Put the waste toner in a sieve, and sieve off the remaining inclusions to obtain a single organic toner;

[0033] C. Fully mix the organic toner and the organic solvent benzene according to the mass ratio of 1:5, shake and centrifuge to obtain a black precipitate, and dry the precipitate at 80°C;

[0034] D. Subsequently, the dried precipitate is placed in a muffle furnace, calcined at a temperature of 600°C for 1 hour, and cooled to room temperature to obtain γ-Fe 2 o 3 magnetic material.

[0035] E. At 78~82°C, the supernatant after centrifugation is distilled to recover benzene.

[0036] Using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and other characterization means to analyze the organ...

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Abstract

The invention relates to a method for preparing a Gamma-Fe2O3 magnetic material by using an abandoned toner cartridge. The method comprises the following steps: taking the abandoned toner cartridge as a raw material, using the characteristic that a black magnetic material Fe3O4 in the abandoned toner generates two variants, namely Alpha-Fe2O3 and Gamma-Fe2O3 when being calcined in air, and preparing the Gamma-Fe2O3 magnetic material by controlling a surface pretreatment process of an organic toner and the subsequent calcination temperature and time. Compared with other preparation methods (such as a coprecipitation method, a chemical vapor deposition method, a non-aqueous media synthesis method, a hydrothermal method, a micro-emulsion method and a high temperature ball milling method) of the Gamma-Fe2O3, the method of the invention has the advantages of being low in preparation cost, simple in process and short in production cycle. The method of the invention takes the abandoned toner cartridge as the raw material, thus the aim of resource utilization of waste materials can be realized, and a simple and fast method is provided for the production and preparation of nanoscale Gamma-Fe2O3 magnetic powders.

Description

technical field [0001] The present invention relates to a kind of gamma-Fe 2 o 3 A method for preparing magnetic materials, especially a method for preparing γ-Fe from waste toner cartridges 2 o 3 methods for magnetic materials. Background technique [0002] Toner cartridges are the main consumables of laser printers and are widely used by institutions, units and home users. As the modern office has higher and higher requirements on the quality and quantity of office accessories (printers, copiers, etc.), the toner cartridges that cannot meet the printing quality requirements or lose the printing function are eliminated or scrapped in large numbers. According to statistics, my country spends more than 26 billion yuan on purchasing printer consumables every year, and many of them are turned into garbage after one-time use. These discarded toner cartridges are separated from various substances such as metals (iron, aluminum), plastics and organic toners through profession...

Claims

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Application Information

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IPC IPC(8): H01F1/11H01F41/00
CPCH01F1/11H01F41/00
Inventor 程知萱史进进杨桂兴胡鹏飞徐甲强谢丽华章雨勤姜玲龚允玉
Owner SHANGHAI UNIV
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