Preparation method of artificial snow based on strontium ferrite

A strontium ferrite and artificial snow technology, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problem that the bonding characteristics of strontium ferrite balls and coating powder are not good enough, the preparation process is complicated, and the coating is affected. effect and other problems, to achieve the effect of facilitating industrial production, simplifying the preparation process, and good self-agglomeration

Inactive Publication Date: 2014-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the coating process of water spraying and powdering, it was found that the bonding characteristics of the sintered strontium ferrite pellets and the coating powder were not good enough, and sometimes some precipitates appeared on the surface of the sintered sample. Substance, thus affecting the overall coating effect
In addition, in the above two coating methods, two sinterings are involved successively, the preparation process is relatively complicated, and the preparation cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The powder used in this embodiment consists of 15wt% SiO 2 , 30wt% ZrO 2 , 20wt% Al 2 o 3 , 20wt% CaO, and 15wt% BaO, the powders of various components were weighed according to the above proportions, ball milled, dried and sieved to obtain the powder.

[0015] The preparation method of artificial snow is as follows: first add water accounting for 1% of the weight of strontium ferrite powder as a binder, and use dry pressing technology to prepare strontium ferrite powder into a strontium ferrite spherical green body with a diameter of 1mm . Then uniformly disperse the strontium ferrite spherical green body on the 80-mesh sieve, then evenly spray water on the surface of the strontium ferrite spherical green body and vibrate the sieve to make the surface fully wet without sticking to each other, and then sprinkle the powder And vibrate the sieve so that the powder is evenly coated on the surface of the strontium ferrite spherical green body. After repeatedly spraying...

Embodiment 2

[0017] The powder used in this example consists of 70wt% SiO 2 , 5wt% ZrO 2 , 10wt% Al 2 o 3 , 10wt% CaO, and 5wt% BaO. Weigh the powders of various components according to the above proportions, ball mill, dry and sieve to obtain the powder.

[0018] The preparation method of artificial snow is as follows: first, 10wt% polyvinyl alcohol aqueous solution accounting for 2% of the weight of strontium ferrite powder is added as a binder, and the strontium ferrite powder is prepared into strontium ferrite powder with a diameter of 5mm by dry pressing technology. Ferrite spherical green body. Then uniformly disperse the strontium ferrite spherical green body on a 60-mesh sieve, then spray water evenly on the surface of the strontium ferrite spherical green body and vibrate the sieve to make the surface fully wet without sticking to each other, and then sprinkle the powder And vibrate the sieve so that the powder is evenly coated on the surface of the strontium ferrite spherical...

Embodiment 3

[0020] The powder used in this example consists of 60wt% SiO 2 , 15wt% ZrO 2 , 10wt% Al 2 o 3 , 10wt% CaO, and 5wt% BaO. Weigh the powders of various components according to the above proportions, ball mill, dry and sieve to obtain the powder.

[0021] The preparation method of artificial snow is as follows: Firstly, 1wt% polyvinyl alcohol aqueous solution accounting for 5% of the weight of strontium ferrite powder is added as a binder, and the strontium ferrite powder is prepared into a strontium ferrite powder with a diameter of 8 mm by dry pressing technology. Ferrite spherical green body. Then uniformly disperse the strontium ferrite spherical green body on a 30-mesh sieve, then spray water evenly on the surface of the strontium ferrite spherical green body and vibrate the sieve to make the surface fully wet without sticking to each other, and then sprinkle the powder And vibrate the sieve so that the powder is evenly coated on the surface of the strontium ferrite sphe...

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Abstract

The invention discloses a preparation method of novel artificial snow based on strontium ferrite, belonging to the technical field of inorganic non-metal materials. The method comprises the following steps: preparing strontium ferrite powder into a strontium ferrite spherical biscuit by a dry press molding technique, coating the powder on the strontium ferrite spherical biscuit, sintering, screening, cleaning and drying to finally obtain the novel artificial snow. The strontium ferrite spheres with favorable integral coating effect prepared by the one-step sintering technique have improved surface conditions; the prepared novel artificial snow has the advantages of white surface, favorable glossiness, favorable combination between the coating layer and base, high mechanical strength and long service life; and the magnetized novel artificial snow has favorable self-aggregation property, damping dispersivity and lubricating property, and has the characteristics similar to natural snow. Besides, the method effectively simplifies the preparation technique, lowers the preparation cost, and is convenient for industrial production.

Description

technical field [0001] The invention relates to a method for preparing novel artificial snow based on strontium ferrite, belonging to the technical field of inorganic non-metallic materials. Background technique [0002] In recent years, skiing has gradually gained people's liking. However, due to seasonal and geographical restrictions, skiing cannot be widely carried out. At present, people have developed some artificial snow, such as freezing water into snow or replacing snow with snow-like materials. However, these artificial snows cannot fundamentally solve the actual needs of skiing. The study found that the sintered strontium ferrite pellets have good self-agglomeration and damping dispersion after magnetization, but it is black and its surface lubricity is not good enough. If it is surface-coated, it is expected to prepare a new type of artificial snow with characteristics similar to natural snow. So far, researchers have used different methods to coat sintered st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/24
Inventor 杨金龙吴甲民张笑妍王亚利
Owner TSINGHUA UNIV
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