CN103710001B - Preparation method of artificial snow based on strontium ferrite - Google Patents
Preparation method of artificial snow based on strontium ferrite Download PDFInfo
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- CN103710001B CN103710001B CN201310683733.5A CN201310683733A CN103710001B CN 103710001 B CN103710001 B CN 103710001B CN 201310683733 A CN201310683733 A CN 201310683733A CN 103710001 B CN103710001 B CN 103710001B
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- strontium ferrites
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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
The present invention relates to a kind of preparation method of the novel artificial snow based on strontium ferrites, belong to technical field of inorganic nonmetallic materials.
Background technology
In recent years, skiing obtains liking of people gradually.But owing to being subject to the restriction in season and region, skiing can not be carried out widely.At present, people have developed some artificial snow-makings, as water-cooled being frozen into snow or replacing avenging etc. with the material that profile is similar to snow.But these snowmaking all fundamentally can not solve the actual demand of skiing.Research finds, sintered strontium ferrites bead have after magnetizing good from agglomeration and damping dispersed, but it self is black and surface lubrication is good not.If carry out Surface coating process to it, be then expected to prepare the novel artificial snow with similar natural snow characteristic.Up to the present, on the basis of researchist's strontium ferrites bead after sintering, different methods is adopted to carry out coated to it.One method first coated powder is prepared into slurry, then by sintering after strontium ferrites bead be immersed, make strontium ferrites bead surface be wrapped by powdery pulp and fully wrap up, through super-dry, sintering, finally obtain coated after strontium ferrites bead.But, find in an experiment, the slurry that coated powder is made be difficult to sinter after strontium ferrites bead good combination, and the strontium ferrites bead taken out from slurry is very easy to inter-adhesive, and the integral coating effect obtaining sample after sintering is bad.Another kind method is strontium ferrites bead surface coated powder first after sintering, through oversintering, finally obtain coated after strontium ferrites bead.But find in the coated process of water spray, powder, the strontium ferrites bead after sintering and the binding characteristic of coated powder are good not, and sintering the sample surfaces obtained, sometimes also there will be part and separate out material, thus the covered effect of impact entirety.In addition, in above-mentioned two kinds of method for coating, all successively related to two-step sintering, its preparation technology's more complicated, preparation cost is relatively high.
In order to address these problems, the present invention's powder directly carries out coated to the spherical biscuit of strontium ferrites, spherical for strontium ferrites biscuit sintering is sintered with coated powder and once completes, so not only can effectively improve integral coating effect, and can production cost be reduced, enhance productivity, be convenient to suitability for industrialized production.
Summary of the invention
A kind of preparation method of the novel artificial snow based on strontium ferrites, first strontium ferrites powder is prepared into the spherical biscuit of strontium ferrites through dry-pressing formed technology, dry-pressing formed binding agent is the polyvinyl alcohol water solution of water, ethanol or 1-10wt%, and binding agent quality is the 1-10% of strontium ferrites powder quality; Use the spherical biscuit of powder coating strontium ferrite again, after sintering, sieve, clean, drying, finally obtain the strontium ferrites bead for the preparation of novel artificial snow.
The diameter of the spherical biscuit of above-mentioned strontium ferrites is 1-10mm.
Carrying out coated method to the spherical biscuit of above-mentioned strontium ferrites is: be first dispersed on 10-80 object sieve by spherical for described strontium ferrites biscuit, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites; Repeat to spray water and vibrate sieve, powder body vibrate sieve, until obtain the evenly coated spherical biscuit of strontium ferrites of powder, the thickness of coating layer is by controlling coated number of times to regulate and control.
The coated thickness of above-mentioned powder is the 3-20% of the spherical biscuit diameter of strontium ferrites.
Above-mentioned powder is by the SiO of 15-70wt%
2, 5-30wt% ZrO
2, 10-20wt% Al
2o
3, 10-20wt% CaO, 5-15wt% BaO composition.
Above-mentioned powder is prepared from by the following method: by SiO
2, ZrO
2, Al
2o
3, carry out ball milling after CaO, BaO mixing, dry the slurry after ball milling, after sieving, obtain powder.
The concrete technology of above-mentioned sintering is: spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, sinter at 1000-1300 DEG C, soaking time is 10-240min.
Tool of the present invention has the following advantages: the present invention adopts disposable sintering process to prepare the respond well strontium ferrites bead of integral coating, improve its condition of surface, the novel artificial snow surface of preparation is snow-white and glossiness good, coating layer is combined with matrix well, physical strength is high, long service life, the novel artificial snow after magnetizing have good from agglomeration, damping dispersed and oilness, there is the characteristic being similar to natural snow.In addition, the method effectively simplifies preparation technology, reduces preparation cost, is convenient to suitability for industrialized production.
Embodiment
The present invention is described in detail below by specific embodiment, but content not thereby limiting the invention.
Embodiment 1:
In the present embodiment, powder used is by the SiO of 15wt%
2, 30wt% ZrO
2, 20wt% Al
2o
3, 20wt% the BaO composition of CaO, 15wt%, weighed the powder of each constituents according to said ratio, ball milling, oven dry after sieving, obtain powder.
The preparation method of snowmaking is as follows: first add account for strontium ferrites powder weight 1% water as binding agent, adopt dry-pressing formed technology strontium ferrites powder to be prepared into the spherical biscuit of strontium ferrites of diameter 1mm.Subsequently spherical for strontium ferrites biscuit is dispersed on 80 object sieves, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites.Constantly repeat to spray water and vibrate sieve, powder body after vibrating sieve 10 times, obtain the spherical biscuit of strontium ferrites that powder is evenly coated.Spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, put into stove and sinter, sintering temperature is 1100 DEG C, and soaking time is 120min.To be sintered complete and sample cooling after, after sieving, clean, drying, the novel artificial snow surface finally prepared is snowy white and glossiness is good, coating layer is combined well with strontium ferrites bead, coating thickness is 10% of the spherical biscuit diameter of strontium ferrites, novel artificial snow after magnetizing have good from agglomeration, damping dispersed and oilness, meet the requirement that snow pack is built.
Embodiment 2:
In the present embodiment, powder used is by the SiO of 70wt%
2, 5wt% ZrO
2, 10wt% Al
2o
3, 10wt% the BaO of CaO, 5wt% form, weighed the powder of each constituents according to said ratio, ball milling, oven dry after sieving, obtain powder.
The preparation method of snowmaking is as follows: the polyvinyl alcohol water solution first adding the 10wt% accounting for strontium ferrites powder weight 2%, as binding agent, adopts dry-pressing formed technology strontium ferrites powder to be prepared into the spherical biscuit of strontium ferrites of diameter 5mm.Subsequently spherical for strontium ferrites biscuit is dispersed on 60 object sieves, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites.Constantly repeat to spray water and vibrate sieve, powder body after vibrating sieve 3 times, obtain the spherical biscuit of strontium ferrites that powder is evenly coated.Spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, put into stove and sinter, sintering temperature is 1000 DEG C, and soaking time is 240min.To be sintered complete and sample cooling after, after sieving, clean, drying, the novel artificial snow surface finally prepared is snowy white and glossiness is good, coating layer is combined well with strontium ferrites bead, coating thickness is 3% of the spherical biscuit diameter of strontium ferrites, novel artificial snow after magnetizing have good from agglomeration, damping dispersed and oilness, meet the requirement that snow pack is built.
Embodiment 3:
In the present embodiment, powder used is by the SiO of 60wt%
2, 15wt% ZrO
2, 10wt% Al
2o
3, 10wt% the BaO of CaO, 5wt% form, weighed the powder of each constituents according to said ratio, ball milling, oven dry after sieving, obtain powder.
The preparation method of snowmaking is as follows: the polyvinyl alcohol water solution first adding the 1wt% accounting for strontium ferrites powder weight 5%, as binding agent, adopts dry-pressing formed technology strontium ferrites powder to be prepared into the spherical biscuit of strontium ferrites of diameter 8mm.Subsequently spherical for strontium ferrites biscuit is dispersed on 30 object sieves, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites.Constantly repeat to spray water and vibrate sieve, powder body after vibrating sieve 8 times, obtain the spherical biscuit of strontium ferrites that powder is evenly coated.Spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, put into stove and sinter, sintering temperature is 1250 DEG C, and soaking time is 60min.To be sintered complete and sample cooling after, after sieving, clean, drying, the novel artificial snow surface finally prepared is snowy white and glossiness is good, coating layer is combined well with strontium ferrites bead, coating thickness is 8% of the spherical biscuit diameter of strontium ferrites, novel artificial snow after magnetizing have good from agglomeration, damping dispersed and oilness, meet the requirement that snow pack is built.
Embodiment 4:
In the present embodiment, powder used is by the SiO of 50wt%
2, 10wt% ZrO
2, 15wt% Al
2o
3, 15wt% the BaO of CaO, 10wt% form, weighed the powder of each constituents according to said ratio, ball milling, oven dry after sieving, obtain powder.
The preparation method of snowmaking is as follows: first add account for strontium ferrites powder weight 10% ethanol as binding agent, adopt dry-pressing formed technology strontium ferrites powder to be prepared into the spherical biscuit of strontium ferrites of diameter 10mm.Subsequently spherical for strontium ferrites biscuit is dispersed on 10 object sieves, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites.Constantly repeat to spray water and vibrate sieve, powder body after vibrating sieve 20 times, obtain the spherical biscuit of strontium ferrites that powder is evenly coated.Spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, put into stove and sinter, sintering temperature is 1300 DEG C, and soaking time is 10min.To be sintered complete and sample cooling after, after sieving, clean, drying, the novel artificial snow surface finally prepared is snowy white and glossiness is good, coating layer is combined well with strontium ferrites bead, coating thickness is 20% of the spherical biscuit diameter of strontium ferrites, novel artificial snow after magnetizing have good from agglomeration, damping dispersed and oilness, meet the requirement that snow pack is built.
Claims (5)
1. the preparation method based on the snowmaking of strontium ferrites, it is characterized in that, first strontium ferrites powder is prepared into the spherical biscuit of strontium ferrites through dry-pressing formed technology, dry-pressing formed binding agent is the polyvinyl alcohol water solution of water, ethanol or 1-10wt%, and binding agent quality is the 1-10% of strontium ferrites powder quality; Use the spherical biscuit of powder coating strontium ferrite again, through sintering, sieving, clean, dry, obtain snowmaking;
Described powder is by the SiO of 15-70wt%
2, 5-30wt% ZrO
2, 10-20wt% Al
2o
3, 10-20wt% CaO, 5-15wt% BaO composition;
Carrying out coated method to the spherical biscuit of described strontium ferrites is: be first dispersed on 10-80 object sieve by spherical for described strontium ferrites biscuit, then spray water at the spherical biscuit surface uniform of strontium ferrites and vibrate sieve, make its surface fully moistening, but it is not inter-adhesive, powder body vibrate sieve subsequently, makes powder evenly be coated on the spherical biscuit surface of strontium ferrites; Repeat to spray water and vibrate sieve, powder body vibrate sieve, until obtain the evenly coated spherical biscuit of strontium ferrites of powder, the thickness of coating layer is by controlling coated number of times to regulate and control.
2. preparation method according to claim 1, is characterized in that, the diameter of the spherical biscuit of described strontium ferrites is 1-10mm.
3. preparation method according to claim 1, is characterized in that, the thickness of described coating layer is the 3-20% of the spherical biscuit diameter of strontium ferrites.
4. preparation method according to claim 1, is characterized in that, described powder is prepared from by the following method: by SiO
2, ZrO
2, Al
2o
3, carry out ball milling after CaO, BaO mixing, dry the slurry after ball milling, after sieving, obtain powder.
5. preparation method according to claim 1, is characterized in that, the concrete technology of described sintering is: spherical for the strontium ferrites being coated with powder biscuit is evenly spread to Al
2o
3in powder, sinter at 1000-1300 DEG C, soaking time is 10-240min.
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|---|---|---|---|
| CN201310683733.5A CN103710001B (en) | 2013-12-12 | 2013-12-12 | Preparation method of artificial snow based on strontium ferrite |
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|---|---|---|---|
| CN201310683733.5A CN103710001B (en) | 2013-12-12 | 2013-12-12 | Preparation method of artificial snow based on strontium ferrite |
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| CN103710001B true CN103710001B (en) | 2014-12-24 |
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Families Citing this family (4)
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| CN104402418B (en) * | 2014-10-17 | 2016-08-17 | 北矿磁材科技股份有限公司 | A kind of preparation method of the snowmaking with magnetic material as matrix |
| CN104861931B (en) * | 2015-04-24 | 2017-05-10 | 北矿磁材科技股份有限公司 | Artificial snow preparation method |
| TWI570229B (en) * | 2015-12-11 | 2017-02-11 | 蕭倍昌 | Artificial snow material and method of producing the same |
| CN111704893B (en) * | 2020-05-26 | 2021-11-05 | 北京理工大学 | Magnetic gel ice and snow material and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63110709A (en) * | 1986-10-29 | 1988-05-16 | Michio Ueno | Ferrite magnet coated with powder |
| ES2394853T3 (en) * | 2005-06-30 | 2013-02-06 | Jingming Lang | Artificial snow, and artificial ski track or ground |
| CN101219475A (en) * | 2007-01-11 | 2008-07-16 | 潘喜峰 | Process for producing nickel phosphor alloy coating strontium ferrite magnetic electromagnetic wave absorption powder |
| CN101276668A (en) * | 2008-02-02 | 2008-10-01 | 河北工业大学 | Method for preparing nano soft magnetic manganese-zinc ferrite |
| CN102942367B (en) * | 2012-11-20 | 2014-07-09 | 上海工程技术大学 | Method for preparing heat resisting plate for processing of soft magnetic ferrite |
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Granted publication date: 20141224 Termination date: 20171212 |