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Preparation method of zirconia-coated iron oxide powder

A technology of iron oxide powder and zirconia, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve the problems of difficult preparation of coating layer, high cost, unfavorable production and promotion, etc., and achieve low production cost , easy to control, thin coating effect

Inactive Publication Date: 2011-12-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the commonly used alkoxide hydrolysis method not only needs to add a surfactant, but also because the zirconium salt precursor particles have very high chemical activity, it is difficult to prepare a uniform coating layer, and the cost is relatively expensive, which is not conducive to industrial production and to promote

Method used

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  • Preparation method of zirconia-coated iron oxide powder
  • Preparation method of zirconia-coated iron oxide powder
  • Preparation method of zirconia-coated iron oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First prepare an aqueous solution of zirconium oxychloride: take zirconium oxychloride octahydrate (ZrOCl 2 ·8H 2 (0) 0.16 g was dissolved in 80 ml of deionized water, and 2 mol / L of hydrochloric acid was added to adjust its pH value to about 0.2. Nanoscale iron oxide particles were added to the above zirconium oxychloride solution, and ultrasonically dispersed for 15 minutes. The above homogeneously dispersed system was stirred by magnetic force for 6 hours under the environment of heating in a water bath at 75°C. After completion, the above dispersion system was centrifuged at 8000r / min for 10 minutes to remove the upper liquid, washed twice with distilled water, and then dried in a vacuum oven at 60°C to obtain zirconia heterogeneously coated particles.

Embodiment 2

[0023] First prepare an aqueous solution of zirconium oxychloride: take zirconium oxychloride octahydrate (ZrOCl 2 ·8H 2 (0) 0.32 g was dissolved in 60 ml of deionized water, and 1 mol / L of hydrochloric acid was added to adjust its pH to 0.4. Nanoscale iron oxide particles were added to the above zirconium oxychloride solution, and ultrasonically dispersed for 5 minutes. The above homogeneously dispersed system was stirred with magnetic force for 24 hours under the environment of heating in a water bath at 70°C. After completion, the above dispersion system was centrifuged at 8000r / min for 10 minutes to remove the upper liquid, washed with distilled water for 3 times, and then dried in a vacuum oven at 60°C to obtain zirconia heterogeneously coated particles.

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Abstract

The invention relates to a preparation method of zirconia-coated iron oxide powder, which belongs to the field of coating materials. The present invention disperses nanoscale iron oxide particles in zirconium inorganic salt solution, adjusts its pH value by adding acid, and controls the temperature and reaction time of the dispersion system, so that the zirconium salt is hydrolyzed under specific conditions. The invention can realize the ultra-thin layer coating of amorphous zirconia on iron oxide nanoparticles, thereby preparing a heterogeneous coating powder with a core-shell structure, which has the advantages of simple process, easy control, and no need to add surfactants, etc. advantage. The prepared coated particle has a thin coating layer, can better maintain the shape and nanometer characteristics of the original particle, and is convenient for popularization to industrial production.

Description

technical field [0001] The invention relates to a preparation method of zirconia-coated iron oxide powder, which belongs to the field of coating materials. Background technique [0002] In recent years, as people have higher and higher requirements on the performance of materials, the original surface of most materials can no longer meet the specific practical conditions. Therefore, it is necessary to coat some particles with certain special functions, so that Effectively protect its original nanometer characteristics. [0003] In order to ensure the dispersibility, oxidation resistance and corrosion resistance of the particles, it is often required to coat the surface of some ultrafine nanoparticles with a protective layer of about 10nm. The traditional nanoparticle coating process is generally coated with organic polymers. Coating, or coating while preparing nanoparticles with metal salts, these existing coating processes are always difficult to meet these new requirement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/06C09C1/24
Inventor 高彦峰赵峰罗宏杰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI