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Surface coating method of strontium ferrite particles for preparing novel artificial snow

A technology of strontium ferrite and particle surface, which is applied in the field of surface coating of strontium ferrite particles, can solve problems such as lack of lubricity and failure to meet the requirements of artificial snow, and achieve low equipment requirements, good self-agglomeration, combined with good effect

Inactive Publication Date: 2015-07-15
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strontium ferrite particles are black and non-lubricious, and cannot meet various requirements for artificial snow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, evenly disperse strontium ferrite particles with a diameter of 2mm on a 30-mesh sieve, then spray water evenly on the surface of the strontium ferrite particles and vibrate the sieve to make the surface fully wet without sticking to each other, then sprinkle glass white powder and The vibrating sieve makes the glass white powder evenly coat the surface of strontium ferrite particles. After repeatedly spraying water and vibrating the sieve, sprinkling glass white powder and vibrating the sieve 7 times, strontium ferrite particles evenly coated with glass white powder were obtained. Uniformly disperse the coated strontium ferrite particles into the Al 2 o 3 Put the powder into the furnace for sintering, the sintering temperature is 850°C, and the holding time is 120min. After the sintering is completed and the sample is cooled, use a sieve to remove Al 2 o 3 powder, put the obtained strontium ferrite particles into a beaker and ultrasonically clean them for 20 ...

Embodiment 2

[0018] First, evenly disperse strontium ferrite particles with a diameter of 4mm on a 30-mesh sieve, then spray water evenly on the surface of the strontium ferrite particles and vibrate the sieve to make the surface fully wet without sticking to each other, then sprinkle glass powder and The vibrating sieve makes the glass powder evenly coat the surface of strontium ferrite particles. After repeating spraying water and vibrating the sieve, sprinkling glass powder and vibrating the sieve 6 times, strontium ferrite particles evenly coated with glass powder were obtained. The coated strontium ferrite particles are evenly dispersed in the MgO powder, put into a furnace for sintering, the sintering temperature is 750° C., and the holding time is 10 minutes. After the sintering is completed and the sample is cooled, use a sieve to remove the MgO powder, put the obtained strontium ferrite particles into a beaker and clean them ultrasonically for 30 minutes. After cleaning, put the s...

Embodiment 3

[0020] First, evenly disperse strontium ferrite particles with a diameter of 3mm on a 40-mesh sieve, then spray water evenly on the surface of the strontium ferrite particles and vibrate the sieve to make the surface fully wet without sticking to each other, and then sprinkle white glaze powder And vibrate the sieve so that the white glaze powder is evenly coated on the surface of the strontium ferrite particles. After repeatedly spraying water and vibrating the sieve, sprinkling white glaze powder and vibrating the sieve 9 times, strontium ferrite particles evenly coated with white glaze powder were obtained. Uniformly disperse the coated strontium ferrite particles into the Al 2 o 3 and MgO mixed powder, put it into the furnace for sintering, the sintering temperature is 1200℃, the holding time is 60min, in which Al 2 o 3 Al in mixed powder with MgO 2 o 3 The mass ratio to MgO powder is 5:1. After the sintering is completed and the sample is cooled, use a sieve to remo...

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Abstract

The present invention discloses a surface coating method of strontium ferrite particles for preparing novel artificial snow, and belongs to the technical field of inorganic non-metal materials. According to the method, opaque glass, glass powder or white glaze powder is adopted to coat strontium ferrite particles, and sintering, screening, washing and drying are performed to obtain the strontium ferrite particles provided for preparing novel artificial snow and having a good surface coating effect. The strontium ferrite particles having the coating layer have the following characteristics that: good self-glomeration, good damping dispersibility and good lubricity are provided after magnetizing, the surface presents a snow white color, gloss is good, the coating layer and the strontium ferrite particles are well bonded, the coating later is thin, mechanical strength is good, a service life is long, good characteristics are provided at a low temperature and a high temperature, and are not affected by regions and seasons, and the particles can be widely used for snow field construction. The surface coating method of the strontium ferrite particles has characteristics of simple coating process, low equipment requirements and low production cost, and is suitable for industrial mass production.

Description

technical field [0001] The invention relates to a method for coating the surface of strontium ferrite particles used for preparing novel artificial snow, and belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Skiing is a combination of tourism, leisure and sports, and has gradually become one of the most popular outdoor sports in recent years. However, since natural snow only exists in winter in a year, and the length of the snow season is different in different regions, this greatly limits the extensive development of skiing sports. Therefore, it is of great practical significance to develop a new type of artificial snow with properties similar to natural snow. At present, people have developed some artificial snow, one is to freeze water into snow, and the other is to prepare various organic or inorganic materials that are similar in appearance to natural snow. The cost of making snow by the first method is high, and it is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/24C04B41/85
Inventor 杨金龙吴甲民孙寅贵张笑妍
Owner TSINGHUA UNIV
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