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Method for preparing nano ferroferric oxide

A ferric oxide and nanotechnology, applied in the field of nanomaterials, can solve the problems of difficult control of process parameters, complex chemical process, difficult mass production, etc., and achieve the effect of realizing mass production, low equipment requirements, and simple process

Inactive Publication Date: 2013-11-13
SUQIAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical method has disadvantages such as complex process, difficult control of process parameters and small output, so it is difficult to produce in batches

Method used

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  • Method for preparing nano ferroferric oxide
  • Method for preparing nano ferroferric oxide
  • Method for preparing nano ferroferric oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Get 20 grams of ferrous oxalate and add it in the ceramic boat, the material layer thickness is 2.5cm. The ceramic boat that ferrous oxalate is housed is placed on the middle position of heating furnace heating band, then feeds high-purity argon gas into heating furnace according to the speed of 5ml / min.

[0023] After the air in the heating furnace is completely replaced by high-purity argon, continue to introduce high-purity argon, control the heating furnace to raise the temperature to 510°C at a rate of 18°C / min, and then keep it at 510°C for 18 minutes to carry out the decomposition reaction.

[0024] After the decomposition reaction, the heating furnace was powered off, and the high-purity argon gas continued to flow in. After the temperature of the heating furnace dropped to 40°C, the high-purity argon flow was stopped, and the material 1 was obtained by cooling to room temperature (18-25°C). The mass of material 1 was 11.318 g, and the yield was 56.59%.

[0025...

Embodiment 2

[0028] Get 20 grams of ferrous oxalate and add it in the ceramic boat, the material layer thickness is 2cm. The ceramic boat that ferrous oxalate is housed is placed on the middle position of the heating furnace heating band, then feeds high-purity argon into the heating furnace according to the speed of 4ml / min.

[0029] After the air in the heating furnace is completely replaced by high-purity argon, continue to feed high-purity argon, control the heating furnace to heat up to 500°C at a rate of 15°C / min, and then keep it at 500°C for 20 minutes to carry out the decomposition reaction.

[0030] After the decomposition reaction, the heating furnace was powered off, and the high-purity argon was continued to flow in. After the temperature of the heating furnace dropped to 30°C, the high-purity argon flow was stopped, and the material 2 was obtained by cooling to room temperature (18-25°C). The mass of material 2 was 11.323 g, and the yield was 56.62%.

[0031] Through the X-r...

Embodiment 3

[0034] Get 20 grams of ferrous oxalate and add it in the ceramic boat, the material layer thickness is 3cm. The ceramic boat that ferrous oxalate is housed is placed on the middle position of heating furnace heating band, then feeds high-purity argon gas into heating furnace according to the speed of 3ml / min.

[0035] After the air in the heating furnace is completely replaced by high-purity argon, continue to feed high-purity argon, control the heating furnace to raise the temperature to 520°C at a rate of 20°C / min, and then keep it at 520°C for 15 minutes to carry out the decomposition reaction.

[0036] After the reaction, the heating furnace was powered off, and the high-purity argon gas continued to flow in. After the temperature of the heating furnace dropped to 35°C, the high-purity argon flow was stopped, and the material 3 was obtained by cooling to room temperature (18-25°C). The mass of material 3 was 11.314 g, and the yield was 56.57%.

[0037] Through the X-ray d...

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Abstract

The invention discloses a method for preparing nano ferroferric oxide. According to the method, ferrous oxalate is subjected to thermal decomposition at 500-520 DEG C in the presence of an inert gas, thus obtaining the nano ferroferric oxide. The method is simple in process and convenient to operate; moreover, a thermal decomposition technology used in the method has low requirement on equipment because of low temperature; in addition, the cost is low due to the adopted ferrous oxalate, so that the method can be used for effectively realizing mass production.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a method for preparing nanometer ferric oxide. Background technique [0002] Nano-ferroferric oxide has the characteristics of superparamagnetism, large specific surface area and quantum tunneling effect, and because of its good chemical stability, low toxicity and low raw material price, it is widely used in the fields of magnetic fluid, electronic materials, biotechnology and medicine. application. [0003] There are mainly physical and chemical methods for preparing nanometer ferroferric oxide: physical methods (such as mechanical pulverization, etc.) are easy to bring in impurities and obtain irregular particle shapes, so they are generally not used. Chemical methods (such as sol-gel method, microemulsion method, precipitation oxidation method, hydrothermal method and chemical co-precipitation method, etc.) have the advantages of convenient operation and easy control of pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y30/00
Inventor 傅小明
Owner SUQIAN COLLEGE
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