CN110451962B - Submillimeter-level zirconia ceramic ball and preparation method thereof - Google Patents

Submillimeter-level zirconia ceramic ball and preparation method thereof Download PDF

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CN110451962B
CN110451962B CN201910783838.5A CN201910783838A CN110451962B CN 110451962 B CN110451962 B CN 110451962B CN 201910783838 A CN201910783838 A CN 201910783838A CN 110451962 B CN110451962 B CN 110451962B
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submillimeter
adhesive
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microbead
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CN110451962A (en
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包金小
吉依民
海文智
阮飞
谢敏
周芬
郜健全
刘国奇
宋希文
安胜利
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Inner Mongolia University of Science and Technology
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Abstract

The invention provides a submillimeter-level zirconia ceramic ball and a preparation method thereof, belonging to the technical field of grinding media. The invention mixes zirconium oxide and yttrium oxide powderThe body is preferentially and respectively mixed with the anionic dispersant and the cationic dispersant, so that the surface activity of the yttrium oxide and the zirconium oxide is improved, and the combination during subsequent mixing is facilitated; then the zirconia slurry and the yttria slurry are coated and mixed by adopting a solid phase, and Y with small grain diameter2O3ZrO capable of being formed in a large particle size2The particle surface is uniformly coated, and the 3YSZ powder obtained after spray drying has better stability, small granularity and better sintering performance, and ensures the sphericity and compactness of the subsequent submillimeter-level zirconia ceramic ball. As can be seen from the examples: the submillimeter-level zirconia ceramic ball provided by the invention has the particle size of 0.4-0.5 mm and the volume density of 5.87-5.94 g/cm3The abrasion is 0.01087-0.01533 g/(kg · h).

Description

Submillimeter-level zirconia ceramic ball and preparation method thereof
Technical Field
The invention relates to the technical field of grinding media, in particular to a submillimeter-level zirconia ceramic ball and a preparation method thereof.
Background
The zirconia ceramic grinding medium has the characteristics of high strength, high toughness, low abrasion, corrosion resistance and the like, and has great advantages in grinding performance compared with other ceramic grinding bodies, so that the zirconia ceramic grinding medium is widely applied to industries needing superfine grinding, such as electronics, coatings, ceramics, mining industry and the like. The traditional isostatic pressing method is difficult to produce ceramic balls with small grain diameter due to the limitation of a mould. The rolling forming method is an effective method for producing small-particle-size ceramic balls in the prior art, and is widely applied to the production of alumina and zirconia ceramic balls.
The rolling forming method is commonly used for producing millimeter-sized zirconia ceramic balls, theoretically, ball blanks with the particle size of 0.5-50 mm can be produced, but the traditional rolling method has the difficulties of poor roundness, poor compactness and difficult forming when preparing the ball blanks with the diameter of less than 1mm, so that the ceramic balls produced by the traditional rolling method on the market are mostly 3-10 mm in diameter.
Disclosure of Invention
In view of the above, the present invention provides a submillimeter-sized zirconia ceramic ball and a preparation method thereof. The preparation method provided by the invention can be used for obtaining the submillimeter-level zirconia ceramic ball with good sphericity and compactness.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a submillimeter-level zirconia ceramic ball, which comprises the following steps:
ZrO 2 is mixed with2Mixing with an anionic dispersant to obtain zirconia slurry; will Y2O3Mixing with a cationic dispersant to obtain yttrium oxide slurry; mixing the zirconia slurry and the yttria slurry, and then performing spray drying to obtain 3YSZ powder; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1;
mixing the 3YSZ powder with an adhesive and rolling and forming to obtain a microbead seed ball;
pressing and rolling the microsphere balls to prepare green microspheres;
and drying, firing and polishing the green microsphere blank to obtain the submillimeter-level zirconia ceramic ball.
Preferably, the ZrO2And Y2O3The mass ratio of (1): 4 to 20.
Preferably, the ZrO2The particle size of the (B) is 500 to 800 nm.
Preferably, the anionic dispersantIs a dispersing agent CE64, the anionic dispersing agent CE64 is mixed with ZrO2The mass ratio of (A) to (B) is 0.003-0.005: 1; the cationic dispersant is cetyl trimethyl ammonium bromide, and the cetyl trimethyl ammonium bromide and Y are2O3The mass ratio of (A) to (B) is 0.003-0.005: 1.
preferably, the specific process of mixing and rolling the 3YSZ powder with the binder to obtain the microbead seed ball comprises the following steps:
mixing the 3YSZ powder with an adhesive to obtain a wet material;
sieving the wet material, performing rolling forming on the obtained undersize, continuously adding an adhesive to the obtained undersize primary forming body when the undersize is primarily formed, and continuously performing rolling forming to obtain the microbead seed ball; the particle size of the microbead seed ball is 0.1-0.3 mm.
Preferably, a method of pressing and rolling is adopted, and the specific process of making the microbead seed ball into the green microsphere blank comprises the following steps:
placing the microbead seedballs in a sugar-coating machine, spraying 3YSZ powder and an adhesive for multiple times, applying pressure to the microbead seedballs and stirring after spraying the adhesive and the 3YSZ powder each time, and performing cyclic operation for 1-3 hours to obtain green bodies;
and after the green body is rolled to a specified size, performing autorotation polishing on the green body to obtain the microsphere green body.
Preferably, the firing step is:
heating from room temperature to 600 ℃ at a heating rate of 150 ℃/h; then heating from 600 ℃ to 1200 ℃ at the heating rate of 100 ℃/h, and preserving the heat at 1200 ℃ for 1-2 h; heating from 1200 ℃ to 1550 ℃ at the heating rate of 120 ℃/h, preserving heat at 1550 ℃ for 2-3h, and then cooling along with the furnace.
Preferably, after the green microsphere is dried, the green microsphere further comprises pre-sintering, and the pre-sintering process comprises the following steps:
heating from normal temperature to 200 ℃ at the heating rate of 150 ℃/h, then heating from 200 ℃ to 550 ℃ at the heating rate of 60 ℃/h, preserving heat for 3h, then heating to 900 ℃ at the heating rate of 120 ℃/h, preserving heat for 3h, and furnace-cooling.
Preferably, the polishing process comprises the steps of:
and mixing the obtained sintered product with water, autogenously grinding and polishing for 2-3h, and drying to obtain the submillimeter-level zirconia ceramic ball.
The invention also provides the submillimeter-sized zirconia ceramic ball obtained by the preparation method in the technical scheme, wherein the particle size of the submillimeter-sized zirconia ceramic ball is 0.4-0.5 mm, and the volume density is 5.87-5.94 g/cm3The abrasion is 0.01087-0.01533 g/(kg · h).
The invention provides a preparation method of a submillimeter-level zirconia ceramic ball, which comprises the following steps: ZrO 2 is mixed with2Mixing with an anionic dispersant to obtain zirconia slurry; will Y2O3Mixing with a cationic dispersant to obtain yttrium oxide slurry; mixing the zirconia slurry and the yttria slurry, and then performing spray drying to obtain 3YSZ powder; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1; mixing the 3YSZ powder with an adhesive and rolling and forming to obtain a microbead seed ball; pressing and rolling the microsphere balls to prepare green microspheres; and drying, firing and polishing the green microsphere blank to obtain the submillimeter-level zirconia ceramic ball. According to the invention, zirconia and yttria are preferentially and respectively mixed with an anionic dispersant and a cationic dispersant, so that the surface activity of yttria and zirconia is improved, and the combination of the yttria and the zirconia during subsequent mixing is facilitated; then the zirconia slurry and the yttria slurry are coated and mixed by adopting a solid phase, and Y with small grain diameter2O3ZrO capable of being formed in a large particle size2The particle surface is uniformly coated, and the 3YSZ powder obtained after spray drying has better stability, small granularity and better sintering performance, and ensures the sphericity and compactness of the subsequent submillimeter-level zirconia ceramic ball. Compared with the traditional rolling forming technology, the method adopts a method of pressing and rolling simultaneously, and the micro-bead ball is made into the green microsphere blank, so that the prepared green microsphere blank has better roundness and is more compact. As can be seen from the examples: the submillimeter-level zirconia ceramic ball provided by the invention has the particle size of 0.4-0.5 mm and the volume density of 5.87-5.94g/cm3The abrasion is 0.01087-0.01533 g/(kg · h).
Furthermore, the preparation method disclosed by the invention is simple in process and high in efficiency, can finish the molding of a batch of microbeads within 1-3 h, and can be used for producing the submillimeter-level ceramic microbeads on a large scale.
The invention also provides the submillimeter-level zirconia ceramic ball in the technical scheme, and the submillimeter-level zirconia ceramic ball provided by the invention has excellent sphericity, compactness and lower abrasion.
Drawings
FIG. 1 is a photograph showing the appearance of a submillimeter-sized zirconia ceramic ball obtained in example 1;
FIG. 2 is a photograph showing the appearance of the submillimeter-sized zirconia ceramic balls obtained in example 2.
Detailed Description
The invention provides a preparation method of a submillimeter-level zirconia ceramic ball, which comprises the following steps:
ZrO 2 is mixed with2Mixing with an anionic dispersant to obtain zirconia slurry; will Y2O3Mixing with a cationic dispersant to obtain yttrium oxide slurry; mixing the zirconia slurry and the yttria slurry, and then performing spray drying to obtain 3YSZ powder; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1;
mixing the 3YSZ powder with an adhesive and rolling and forming to obtain a microbead seed ball;
pressing and rolling the microsphere spheres to prepare microsphere green compacts;
and drying, firing and polishing the green microsphere blank to obtain the submillimeter-level zirconia ceramic ball.
The invention uses ZrO2Mixing with an anionic dispersant to obtain zirconia slurry; will Y2O3Mixing with a cationic dispersant to obtain yttrium oxide slurry; mixing the zirconia slurry and the yttria slurry, and then performing spray drying to obtain 3YSZ powder; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1.
in the present invention, theZrO2The particle size of (A) is preferably 500 to 800nm, and more preferably 800 nm; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1. in the present invention, the ZrO2And Y2O3Is preferably 1: 4-20, and more preferably 1: 20. in the present invention, the anionic dispersant is preferably a dispersant CE64, the anionic dispersant CE64 is mixed with ZrO2The mass ratio of (A) to (B) is 0.003 to 0.005:1, more preferably 0.004: 1. in the present invention, the cationic dispersant is preferably cetyltrimethylammonium bromide, which is mixed with Y2O3The mass ratio of (A) is preferably 0.003 to 0.005:1, more preferably 0.004: 1.
in the present invention, the ZrO2And an anionic dispersant, said Y2O3The mixing mode with the cationic dispersant is preferably ball milling, and the ball milling time is preferably 3 h; the ball milling is preferably carried out in a ball milling jar.
In the invention, the mixing of the zirconia slurry and the yttria slurry is preferably carried out under the condition of alternating-current electric field stirring, and the stirring time is preferably 3 h; the frequency of the alternating current electric field is preferably 45-55 Hz.
The parameters of the spray drying are not particularly limited in the present invention, and spray drying parameters well known to those skilled in the art may be used.
According to the invention, the zirconia and the yttria powder are preferentially and respectively mixed with the anionic dispersant and the cationic dispersant, so that the surface activity of the yttria and the zirconia is improved, and the combination of subsequent zirconia slurry and yttria slurry during mixing is facilitated; then the zirconia slurry and the yttria slurry are coated and mixed by adopting a solid phase, and Y with small grain diameter2O3ZrO capable of being formed in a large particle size2The surface of the particles is uniformly coated, and the 3YSZ powder obtained after spray drying has better stability, small granularity and better sintering performance.
After obtaining the 3YSZ powder, the invention mixes the 3YSZ powder with the adhesive and rolls and forms to obtain the microsphere balls.
In the invention, the specific process of mixing and rolling the 3YSZ powder with the adhesive to obtain the microbead seed ball preferably comprises the following steps:
mixing the 3YSZ powder with an adhesive to obtain a wet material;
sieving the wet material, performing rolling forming on the obtained undersize, continuously adding an adhesive to the obtained undersize primary forming body when the undersize is primarily formed, and continuously performing rolling forming to obtain the microbead seed ball; the particle size of the microbead seedballs is 0.1-0.3 mm.
In the present invention, the binder is preferably an aqueous PVA solution having a mass concentration of 0.3%; in the present invention, the mass ratio of the 3YSZ powder to the binder is preferably 100: 20-30. In the present invention, the mixing is preferably performed under stirring; the stirring time and the rotation speed are not particularly limited, as long as the 3YSZ powder and the adhesive can be uniformly mixed.
In the invention, the mesh number of the screen used for screening the wet material is preferably 30-50 meshes, and more preferably 40 meshes. In the invention, the rolling forming is preferably carried out in a sugar coating machine, and the rotation speed of the sugar coating machine is preferably 35-45 r/min.
In the present invention, the amount of the binder to be continuously added is preferably 5% by mass of the wet mass. The time for continuous rolling forming is not particularly limited, and only the microbead seed ball with the particle size of 0.1-0.3 mm can be ensured to be finally obtained.
In the invention, the microbead spheres prepared by the method can have certain strength.
After obtaining the microsphere beads, the invention adopts a method of pressing and rolling the microsphere beads to prepare the microsphere green bodies.
In the invention, a method of pressing and rolling is adopted, and the specific process of preparing the microsphere green compact by the microsphere seed spheres preferably comprises the following steps:
placing the microbead seedballs in a sugar-coating machine, spraying 3YSZ powder and an adhesive for multiple times, applying pressure to the microbead seedballs and stirring after spraying the adhesive and the 3YSZ powder each time, and performing cyclic operation for 1-3 hours to obtain green bodies;
and after the green body is rolled to a specified size, performing autorotation polishing on the green body to obtain the microsphere green body.
In the invention, the rotating speed of the sugar-coating machine is preferably 35-45 r/min. In the present invention, the mass of the 3YSZ powder sprayed each time is preferably not more than 5% of the total mass of the microbead and seed sphere. In the invention, the mass ratio of the 3YSZ powder to the adhesive sprayed each time is preferably 5: 1; the binder is preferably an aqueous PVA solution having a mass concentration of 0.3%. In the present invention, the order of spraying the 3YSZ powder and the binder each time is preferably that the binder is sprayed first and then the 3YSZ powder is sprayed.
In the invention, the pressure of each applied pressure is preferably 4kPa, and the time of each stirring is preferably 10-50 s.
In the invention, the green body is sprayed with water and then subjected to autorotation polishing, wherein the adding amount of the water is preferably 5% of the mass of the green body; the autorotation polishing time is preferably 2-3 h.
Compared with the traditional rolling forming technology, the method of pressing and rolling simultaneously is adopted, and the prepared green microspheres have better roundness and are more compact.
After obtaining the green microsphere, the invention sequentially dries, burns and polishes the green microsphere to obtain the submillimeter-level zirconia ceramic ball.
In the present invention, before the drying, the green microsphere is preferably further dried naturally for 24 hours. In the present invention, the temperature of the drying is preferably 100 ℃ and the time is preferably 1h, and the drying is preferably performed in an oven.
According to the invention, the green microsphere blank is dried after being naturally dried, so that cracking of the green microsphere blank is avoided.
In the present invention, the firing step preferably includes the steps of:
heating from room temperature to 600 ℃ at a heating rate of 150 ℃/h; then heating from 600 ℃ to 1200 ℃ at the heating rate of 100 ℃/h, and preserving the heat at 1200 ℃ for 1-2 h; heating from 1200 ℃ to 1550 ℃ at the heating rate of 120 ℃/h, preserving heat at 1550 ℃ for 2-3h, and then cooling along with the furnace.
In the invention, the heat preservation is carried out for 1-2 h at 1200 ℃ in the firing process, so that the zirconium oxide phase change is sufficient, and the final ceramic ball has better mechanical property; the heat preservation is carried out for 2-3h at 1550 ℃, the ceramic ball can be prevented from cracking, and the quality of finished products is ensured.
In the present invention, after the drying and before the firing, it is also preferable to perform a pre-sintering; the pre-sintering process preferably comprises the steps of:
heating from normal temperature to 200 ℃ at the heating rate of 150 ℃/h, then heating from 200 ℃ to 550 ℃ at the heating rate of 60 ℃/h, preserving heat for 3h, then heating to 900 ℃ at the heating rate of 120 ℃/h, preserving heat for 3h, and furnace-cooling.
In the invention, in the pre-sintering process, the aim of removing glue is achieved by keeping the temperature at 550 ℃ for 3h, the homogenization effect is achieved by keeping the temperature at 900 ℃ for 3h, and the pre-sintered ceramic balls have smooth and transparent surfaces and better whiteness.
In the present invention, the polishing process preferably includes the steps of:
and mixing the obtained sintered product with water, and carrying out autogenous grinding polishing and drying to obtain the submillimeter-level zirconia ceramic ball.
In the present invention, the mass ratio of the fired product to water is preferably 2: 1; the self-grinding polishing time is preferably 2-3 h.
The preparation method provided by the invention has the advantages of simple process and high efficiency, can finish the molding of a batch of microbeads within 1-3 h, and can be used for producing the submillimeter-level zirconia ceramic balls on a large scale.
The invention also provides the submillimeter-sized zirconia ceramic ball obtained by the preparation method in the technical scheme, the particle size of the submillimeter-sized zirconia ceramic ball is 0.4-0.5 mm, the sphericity is more than 97%, and the bulk density is 5.87-5.94 g/cm3The abrasion is 0.01087-0.01533 g/(kg · h).
The submillimeter-level zirconia ceramic ball provided by the invention has excellent sphericity and compactness.
The present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Selecting a particle size ratio of 16: 1 ZrO2(particle size 800nm) and Y2O3(particle size 50nm) as a starting material, CE64 as an anionic dispersant, and CTAB as a cationic dispersant; ZrO 2 is mixed with2And CE64, Y2O3Adding the mixture and CTAB into a ball milling tank respectively, and uniformly dispersing for 3h to obtain zirconia slurry and yttria slurry respectively, wherein ZrO is2And Y2O3The mass ratio of (A) to (B) is 20: 1; the ZrO2Mass ratio to CE64 was 1: 0.004, Y2O3Mass ratio to CTAB is 1: 0.004; and stirring the zirconia slurry and the yttria slurry for 3 hours under an alternating current electric field, and then performing spray drying to obtain 3YSZ powder with the particle size of 150 nm.
1kg of 3YSZ powder and 200mL of adhesive (PVA aqueous solution with mass concentration of 0.3%) are stirred and mixed uniformly to obtain wet material; and (3) sieving the wet material by a 40-mesh sieve, dropping the sieved material into a sugar coating machine, continuously spraying an adhesive on the surface of small particles below the sieve (the mass of the continuously sprayed adhesive is 5% of the mass of the wet material), and rolling to obtain the microbead seed balls with the particle size of 0.1-0.3 mm and certain strength.
Adding the micro-bead spheres into a sugar-coating machine according to the weight ratio of 3YSZ powder to adhesive (PVA aqueous solution with mass concentration of 0.3%) of 5:1, firstly spraying a binder, then adding 3YSZ powder, applying certain pressure (the pressure is 4kPa) to the microbead seed balls and stirring for 10s after adding the 3YSZ powder (the mass of the 3YSZ powder is 5 percent of the total mass of the microbead seed balls) and the binder each time, and performing circulating operation for 2h to obtain green bodies with the particle size of 0.5 mm; and spraying a small amount of deionized water on the surface of the green body, and performing autorotation polishing in a sugar coating machine for 2 hours to obtain the microbead green body.
And naturally drying the microbead green compact for 24 hours, and then drying the microbead green compact in a drying oven at 100 ℃ for 1 hour to obtain a dried product.
Sintering the obtained dried product according to the following sintering process: and (3) placing the dried product into a furnace, heating the dried product from normal temperature to 600 ℃ in the furnace at the heating rate of 150 ℃/h, then heating the dried product to 1200 ℃ at the heating rate of 100 ℃/h, preserving the heat for 1h at 1200 ℃, then heating the dried product to 1550 ℃ at the heating rate of 120 ℃/h, preserving the heat for 3h, and cooling the product along with the furnace to obtain a fired product.
And mixing the obtained sintered product with water, and then carrying out self-grinding and polishing for 2 hours to obtain the submillimeter-level zirconia ceramic ball with the particle size of 0.4-0.5 mm.
And (3) performance determination: measuring the volume density of the submillimeter-level zirconia ceramic ball by adopting an Archimedes drainage method; according to the national building material industry standard: the abrasion of the submillimeter-sized zirconia ceramic balls was determined by the method described in "JC/T2136-.
The results were: the bulk density of the submillimeter-sized zirconia ceramic balls obtained in this example was 5.87g/cm3The abrasion was 0.01533 g/(kg. h).
Example 2
The other steps are the same as example 1, but the pre-sintering process is performed after the baking step and before the firing process:
the pre-sintering process comprises the following steps: heating the temperature in the furnace from normal temperature to 200 ℃ at a heating rate of 150 ℃/h, then heating the temperature from 200 ℃ to 550 ℃ at a heating rate of 60 ℃/h, preserving the heat for 3h, then heating the temperature to 900 ℃ at a heating rate of 120 ℃/h, preserving the heat for 3h, and cooling along with the furnace.
The particle diameter of the obtained submillimeter-level zirconia ceramic ball is 0.4-0.5 mm, and the volume density is 5.94g/cm3The abrasion was 0.01087 g/(kg. h).
FIG. 1 is a photograph showing the appearance of a submillimeter-sized zirconia ceramic ball obtained in example 1; FIG. 2 is a photograph showing the appearance of the submillimeter-sized zirconia ceramic balls obtained in example 2; as can be seen from fig. 1 and 2: the sphericity of the submillimeter-sized zirconia ceramic balls obtained in examples 1 and 2 is good; at the same time, the pre-sintered pellets (fig. 2) are a little more whiteness-neutral.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (4)

1. A preparation method of a submillimeter-level zirconia ceramic ball is characterized by comprising the following steps:
ZrO 2 is mixed with2Mixing with an anionic dispersant to obtain zirconia slurry; will Y2O3Mixing with a cationic dispersant to obtain yttrium oxide slurry; mixing the zirconia slurry and the yttria slurry, and then performing spray drying to obtain 3YSZ powder; the ZrO2And Y2O3Has a particle diameter ratio of 16: 1;
mixing the 3YSZ powder with an adhesive and rolling and forming to obtain a microbead seed ball;
pressing and rolling the microsphere balls to prepare green microspheres;
drying, sintering and polishing the microsphere green body in sequence to obtain the submillimeter-level zirconia ceramic ball;
the method for pressing and rolling the microspheres simultaneously comprises the following steps of:
placing the microbead seedballs in a sugar-coating machine, spraying 3YSZ powder and an adhesive for multiple times, applying pressure to the microbead seedballs and stirring after spraying the adhesive and the 3YSZ powder each time, and performing cyclic operation for 1-3 hours to obtain green bodies;
after the green body is rolled to a specified size, performing autorotation polishing on the green body to obtain the microsphere green body;
the rotating speed of the sugar coating machine is 35-45 r/min; the mass of the 3YSZ powder sprayed each time is not more than 5% of the total mass of the microbead and the seed ball; the mass ratio of the 3YSZ powder to the adhesive sprayed each time is 5: 1; the adhesive is a PVA aqueous solution with the mass concentration of 0.3%; the 3YSZ powder and the adhesive are sprayed in sequence of firstly spraying the adhesive and then spraying the 3YSZ powder each time; the pressure intensity of each applied pressure is 4kPa, and the stirring time is 10-50 s;
the firing process comprises the following steps:
heating from room temperature to 600 ℃ at a heating rate of 150 ℃/h; then heating from 600 ℃ to 1200 ℃ at the heating rate of 100 ℃/h, and preserving the heat at 1200 ℃ for 1-2 h; heating from 1200 ℃ to 1550 ℃ at a heating rate of 120 ℃/h, preserving heat at 1550 ℃ for 2-3h, and then cooling along with the furnace;
after the green microsphere blank is dried, the method also comprises the step of pre-sintering, wherein the pre-sintering process comprises the following steps:
heating from normal temperature to 200 ℃ at the heating rate of 150 ℃/h, then heating from 200 ℃ to 550 ℃ at the heating rate of 60 ℃/h, preserving heat for 3h, heating to 900 ℃ at the heating rate of 120 ℃/h, preserving heat for 3h, and cooling along with the furnace;
the ZrO2The particle size of the (B) is 500-800 nm;
the anionic dispersant is a dispersant CE64, and the anionic dispersant CE64 and ZrO2The mass ratio of (A) to (B) is 0.003-0.005: 1; the cationic dispersant is cetyl trimethyl ammonium bromide, and the cetyl trimethyl ammonium bromide and Y are2O3The mass ratio of (A) to (B) is 0.003-0.005: 1.
2. the preparation method according to claim 1, wherein the specific process of mixing the 3YSZ powder with the binder and rolling and forming to obtain the microbead seed ball comprises the following steps:
mixing the 3YSZ powder with an adhesive to obtain a wet material;
sieving the wet material, performing rolling forming on the obtained undersize, continuously adding an adhesive to the obtained undersize primary forming body when the undersize is primarily formed, and continuously performing rolling forming to obtain the microbead seed ball; the particle size of the microbead seed ball is 0.1-0.3 mm.
3. The method for manufacturing a ceramic electronic component according to claim 1, wherein the polishing step includes the steps of:
and mixing the obtained sintered product with water, autogenously grinding and polishing for 2-3h, and drying to obtain the submillimeter-level zirconia ceramic ball.
4. The method according to any one of claims 1 to 3, wherein the submillimeter-sized zirconia ceramic balls have a particle size of 0.4 to 0.5mm and a bulk density of 5.87 to 5.94g/cm3The abrasion is 0.01087 to 0.01533g/(kg·h)。
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