CN110526692A - The preparation method of alumina ceramic prilling powder - Google Patents
The preparation method of alumina ceramic prilling powder Download PDFInfo
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- CN110526692A CN110526692A CN201910964358.9A CN201910964358A CN110526692A CN 110526692 A CN110526692 A CN 110526692A CN 201910964358 A CN201910964358 A CN 201910964358A CN 110526692 A CN110526692 A CN 110526692A
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Abstract
The invention proposes a kind of preparation methods of alumina ceramic prilling powder, include the following steps, is dry grinded using 93-95 parts of alpha-aluminium oxide, 1-1.5 parts of magnesium aluminium spinel powder, 2-3 parts of calcium carbonate, -1.5 parts of silica 1 and 0.3-1 parts of rare earth oxide, is pulverized and mixed and is formed uniformly powder；Manufactured powder is placed in ball mill, water is added and is uniformly mixed to form slurry with powder into ball mill, wherein the solid content of slurry is 40-60%；Manufactured slurry is formed into mist projection granulating powder through mist projection granulating tower mist projection granulating；Manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
Description
[technical field]
The present invention relates to aluminium oxide ceramics technical field more particularly to a kind of preparation methods of alumina ceramic prilling powder.
[background technique]
A variety of additives are added to reduce the sintering temperature of aluminium oxide ceramics, together with this in aluminium oxide ceramics during the preparation process
When can cause into the reduction of aluminium oxide ceramics density again, and then influence intensity, the insulation performance of porcelain piece.Aluminium oxide ceramics at present
Nominal sintering temperature is generally 1630-1680 DEG C, and temperature is high, and sintering time needs more than for 24 hours, and so there is yield
Low, at high cost problem.
In consideration of it, it is really necessary to provide a kind of preparation method of novel alumina ceramic prilling powder to overcome above-mentioned lack
It falls into.
[summary of the invention]
The object of the present invention is to provide a kind of preparation methods of alumina ceramic prilling powder, can enhance the insulating properties of porcelain piece
Energy.
To achieve the goals above, the present invention provides a kind of preparation method of alumina ceramic prilling powder, including walks as follows
Suddenly,
S100: alpha-aluminium oxide 93-95 parts, 1-1.5 parts of magnesium aluminium spinel powder, 2-3 parts of calcium carbonate, silica 1-1.5 are used
Part and 0.3-1 parts of rare earth oxide dry grinded, be pulverized and mixed and be formed uniformly powder；
S101: manufactured powder is placed in ball mill, is added water and is uniformly mixed to be formed with powder into ball mill
Slurry, wherein the solid content of slurry is 40-60%；
S102: manufactured slurry is formed into mist projection granulating powder through mist projection granulating tower mist projection granulating；
S103: manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
In a preferred embodiment, the meso-position radius of the alpha-aluminium oxide is 2-60 μm.
In a preferred embodiment, the meso-position radius of the magnesium aluminium spinel powder is 2-10 μm.
In a preferred embodiment, the aluminium content in the magnesium aluminium spinel powder is 80-90%, the magnalium
Content of magnesium in spinel powder is 10-20%, and the specific surface of the magnesium aluminium spinel powder is greater than 5000m3/kg。
In a preferred embodiment, the rare earth oxide is appointing in lanthana, yttrium oxide and cerium oxide
It anticipates one kind.
In a preferred embodiment, the phosphoric acid is 19.5mm2/s；The meso-position radius of the slurry is
1.0-5.0 micron.
Compared with prior art, the preparation method of alumina ceramic prilling powder provided by the invention, beneficial effect are, tool
There is the characteristic of high insulating properties, high mechanical strength and heat shock resistance, electronic ceramics can be met to insulating properties height, heat shock resistance, machine
The strong high demand of tool.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the flow chart of the preparation method of alumina ceramic prilling powder provided by the invention.
[specific embodiment]
It is clear in order to be more clear the purpose of the present invention, technical solution and advantageous effects, below in conjunction with attached drawing and
Specific embodiment, the present invention will be described in further detail.It should be understood that specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
Referring to Fig. 1, the present invention provides a kind of preparation method of alumina ceramic prilling powder, include the following steps,
S100: alpha-aluminium oxide 93-95 parts, 1-1.5 parts of magnesium aluminium spinel powder, 2-3 parts of calcium carbonate, silica 1-1.5 are used
Part and 0.3-1 parts of rare earth oxide dry grinded, be pulverized and mixed and be formed uniformly powder；
S101: manufactured powder is placed in ball mill, is added water and is uniformly mixed to be formed with powder into ball mill
Slurry, wherein the solid content of slurry is 40-60%；
S102: manufactured slurry is formed into mist projection granulating powder through mist projection granulating tower mist projection granulating；
S103: manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
Specifically, the meso-position radius of the alpha-aluminium oxide is 2-60 μm.
Specifically, the meso-position radius of the magnesium aluminium spinel powder is 2-10 μm.
Specifically, the aluminium content in the magnesium aluminium spinel powder is 80-90%, the magnesium in the magnesium aluminium spinel powder
Content is 10-20%, and the specific surface of the magnesium aluminium spinel powder is greater than 5000m3/kg.In this way, by alumina content
With the control of content of magnesia, the crystal phase growth after aluminium oxide ceramics magnesium aluminium spinel powder can be made is inhibited,
The sintering temperature of aluminium oxide ceramics is reduced, simultaneously to realize the quick formation of aluminium oxide ceramics densification.
Specifically, the rare earth oxide is any one in lanthana, yttrium oxide and cerium oxide.The rare earth oxygen
Compound is used to improve the microscopic appearance of alumina ceramic prilling powder, improves mechanical performance.
Specifically, the phosphoric acid is 19.5mm2/s；The meso-position radius of the slurry is 1.0-5.0 microns.
Embodiment:
Embodiment 1:
Using 95 parts of alpha-aluminium oxide, 1 part of magnesium aluminium spinel powder, 2 parts of calcium carbonate, silica 1 part and rare earth oxide
0.5 part is dry grinded, is pulverized and mixed and is formed uniformly powder；Manufactured powder is placed in ball mill, adds water to ball milling
It is uniformly mixed to form slurry with powder in machine, wherein the solid content of slurry is 40%；Manufactured slurry is sprayed through mist projection granulating tower
Mist is granulated to form mist projection granulating powder；Manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
Embodiment 2:
Using 94 parts of alpha-aluminium oxide, 1.5 parts of magnesium aluminium spinel powder, 2 parts of calcium carbonate .5 parts of silica 1 and rare-earth oxidation
0.5 part of object is dry grinded, is pulverized and mixed and is formed uniformly powder；Manufactured powder is placed in ball mill, adds water to ball
It is uniformly mixed to form slurry with powder in grinding machine, wherein the solid content of slurry is 40%；By manufactured slurry through mist projection granulating tower
Mist projection granulating forms mist projection granulating powder；Manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
Embodiment 3:
Using 93 parts of alpha-aluminium oxide, 1 part of magnesium aluminium spinel powder, 3 parts of calcium carbonate, silica 1 part and rare earth oxide
0.8 part is dry grinded, is pulverized and mixed and is formed uniformly powder；Manufactured powder is placed in ball mill, adds water to ball milling
It is uniformly mixed to form slurry with powder in machine, wherein the solid content of slurry is 40%；Manufactured slurry is sprayed through mist projection granulating tower
Mist is granulated to form mist projection granulating powder；Manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
Comparative example:
It dry grinded using 94 parts of alpha-aluminium oxide, 2 parts of calcium carbonate and .5 parts of silica 1, be pulverized and mixed and be formed uniformly powder
Material；Manufactured powder is placed in ball mill, water is added and is uniformly mixed to form slurry with powder into ball mill, wherein expecting
The solid content of slurry is 40%；Manufactured slurry is formed into mist projection granulating powder through mist projection granulating tower mist projection granulating；It will be manufactured spraying
Pelletizing removes iron, and alumina ceramic prilling powder is made and is packed.
Embodiment 1, embodiment 2, alumina ceramic prilling powder made of embodiment 3 and comparative example is respectively adopted in high temperature
The case where being sintered under environment such as the following table 1:
Table 1:
As shown in Table 1, the sintered body of alumina ceramic prilling powder made of embodiment 1, embodiment 2 and embodiment 3
The numerical value for accumulating density, shrinking percentage, flexural strength and dielectric strength is all larger than alumina ceramic prilling powder made of comparative example
The numerical value of bulk density, shrinking percentage, flexural strength and dielectric strength, so that embodiment 1, embodiment 2 and embodiment 3 are made
Alumina ceramic prilling powder there is the characteristic of insulating properties high, high mechanical strength and heat shock resistance.
It should be noted that alumina ceramic prilling powder made of embodiment 1, embodiment 2 and embodiment 3 sintering when
Between be no more than 24 hours, sintering time is shorter, be conducive to improve production capacity and reduce production cost.
In conclusion there is insulating properties height, mechanical strength using alumina ceramic prilling powder made of the embodiment of the present invention
High and heat shock resistance characteristic can meet electronic ceramics to insulating properties height, heat shock resistance, mechanical strong high demand.
The present invention is not only in the description and the implementation described, therefore for the personnel of familiar field
Other advantage and modification is easily implemented, therefore in the essence without departing substantially from universal defined by claim and equivalency range
In the case where mind and range, the present invention is not limited to specific details, representative equipment and diagrams shown and described herein
Example.
Claims (6)
1. a kind of preparation method of alumina ceramic prilling powder, which is characterized in that include the following steps,
S100: use 93-95 parts of alpha-aluminium oxide, 1-1.5 parts of magnesium aluminium spinel powder, 2-3 parts of calcium carbonate, -1.5 parts of silica 1 with
And 0.3-1 parts of rare earth oxide dry grinded, be pulverized and mixed and be formed uniformly powder；
S101: manufactured powder is placed in ball mill, is added water and is uniformly mixed to form slurry with powder into ball mill,
Wherein the solid content of slurry is 40-60%；
S102: manufactured slurry is formed into mist projection granulating powder through mist projection granulating tower mist projection granulating；
S103: manufactured mist projection granulating powder is removed into iron, alumina ceramic prilling powder is made and is packed.
2. the preparation method of alumina ceramic prilling powder as described in claim 1, which is characterized in that the alpha-aluminium oxide
Meso-position radius is 2-60 μm.
3. the preparation method of alumina ceramic prilling powder as described in claim 1, which is characterized in that the magnesium aluminate spinel
The meso-position radius of powder is 2-10 μm.
4. the preparation method of alumina ceramic prilling powder as described in claim 1, which is characterized in that the magnesium aluminate spinel
Aluminium content in powder is 80-90%, and the content of magnesium in the magnesium aluminium spinel powder is 10-20%, and the magnalium point is brilliant
The specific surface of mountain flour is greater than 5000m3/kg。
5. the preparation method of alumina ceramic prilling powder as described in claim 1, which is characterized in that the rare earth oxide
For any one in lanthana, yttrium oxide and cerium oxide.
6. the preparation method of alumina ceramic prilling powder as described in claim 1, which is characterized in that the phosphoric acid is
19.5mm2/s；The meso-position radius of the slurry is 1.0-5.0 microns.
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| CN110790577A (en) * | 2019-12-13 | 2020-02-14 | 东莞信柏结构陶瓷股份有限公司 | Black alumina ceramic granulated powder and preparation method thereof and black alumina ceramic |
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| EP1440937A1 (en) * | 2003-01-08 | 2004-07-28 | Aluminium-Salzschlacke Aufbereitungs GmbH | High-alumina raw material, process for its preparation and the use thereof |
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| CN101759428A (en) * | 2009-04-10 | 2010-06-30 | 宁波大学 | Method for producing aluminium oxide ceramic composition containing novel four-component sintering additive |
| CN104230315A (en) * | 2013-06-14 | 2014-12-24 | 上海好景新型陶瓷材料有限公司 | Formula of aluminum oxide ceramic pelleting powder |
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| CN110790577A (en) * | 2019-12-13 | 2020-02-14 | 东莞信柏结构陶瓷股份有限公司 | Black alumina ceramic granulated powder and preparation method thereof and black alumina ceramic |
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