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Process for preparing ferric oxide hollow particle using core-shell structured ferric oxide-organic composite particle

A composite particle, iron oxide technology, applied in the direction of magnetic properties of inorganic materials, etc., can solve the problems of inability to obtain extensive and effective application, inability to obtain compact and complete, cumbersome preparation process, etc., and achieves easy popularization and application, wide range of uses, and high product purity. Effect

Inactive Publication Date: 2005-03-16
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the layer-by-layer adsorption of the polymer electrolyte, the spherical shell is loose after sintering and the dense and complete magnetic hollow ball cannot be obtained; and the cumbersome preparation process makes this technology unable to be widely and effectively applied in practice.

Method used

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  • Process for preparing ferric oxide hollow particle using core-shell structured ferric oxide-organic composite particle
  • Process for preparing ferric oxide hollow particle using core-shell structured ferric oxide-organic composite particle

Examples

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Effect test

Embodiment 1

[0029] Example 1: Take 50-150 grams of self-made (shell / core) iron oxide-organic composite microspheres (particle size is 240 nanometers), put them into a porcelain crucible, and put them into a 20-liter ordinary sintering furnace. Slowly rise to the sintering temperature of 550°C at a rate of 10°C / min, and keep at this temperature for 4 to 5 hours; then slowly cool to room temperature at a rate of 10°C / min to obtain a sintering temperature of 220 nanometers and a wall thickness of Iron oxide hollow microsphere particles of 50-70 nanometers.

Embodiment 2

[0030] Example 2: Take 50-150 grams of self-made (core-shell) magnetic iron oxide-organic composite microspheres (with a particle size of 240 nanometers), put them into a porcelain crucible, and put them into a 20-liter airtight sintering furnace. Then pass through high-purity nitrogen protective gas, and after excluding the oxygen in the furnace for 30 minutes, slowly rise to the sintering temperature of 550°C at a speed of 10°C / min, and keep it at this temperature for 4 to 5 hours; slow cooling down to room temperature at a rate of 1 / min to obtain hollow-structured magnetic microsphere particles with a size of 220 nanometers and a wall thickness of 50-70 nanometers. attached figure 1 The hollow microspheres in are easily adsorbed on a magnetic block or an iron block, showing magnetism.

Embodiment 3

[0031] Example 3: Take 50-150 grams of self-made (core-shell) magnetic iron oxide-organic composite microspheres (with a particle size of 350 nanometers), put them into a porcelain crucible, and put them into a 20-liter airtight sintering furnace. Then pass through high-purity argon protective gas, and after excluding the oxygen in the furnace for 30 minutes, slowly rise to the sintering temperature of 550°C at a speed of 10°C / min, and keep it at this temperature for 4 to 5 hours; Slowly cooling to room temperature at a rate of °C / min to obtain hollow magnetic microsphere particles with a size of 320 nanometers and a wall thickness of 60-80 nanometers. attached figure 2 The hollow microspheres in are easily adsorbed on a magnetic block or an iron block, showing magnetism.

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Abstract

Process for preparing magnetic hollow sub-micron particles by using core-shell structured magnetic ferric oxide-organic composite microspheres, which consists of slowly elevating temperature so as to control the heating speed during sintering, thus obtaining complete sphere hollow particles, by sintering magnetic composite microspheres of different monodispersion dimension and having core-shell structure, ferric oxide hollow particles with monodispersity and different dimensions can be otained.

Description

field of invention [0001] The invention belongs to the technical field of preparing inorganic hollow microsphere particles by using composite particles, in particular to a method for preparing magnetic iron oxide hollow particles by using core / shell structure magnetic iron oxide-organic composite particles. Background technique [0002] Recently, people have made great progress in the design and research of nanostructured materials with special functions. The value of nanomaterials lies in their optical, electrical, magnetic, mechanical, chemical and other properties. These properties are due to the properties of nanomaterials. Determined by the ordered structure of size and composition. Due to their unique magnetic properties, magnetic nanomaterials were first used in the biological field, such as biochemical drugs for separating genes and magnetically guided therapeutic drugs; now they are also widely used in information storage materials. Therefo...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/64H01F1/10H01F1/11
Inventor 唐芳琼黄忠兵
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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