KR20190005083A - Manufacturing method of slurry for solid oxide fuel cell and slurry for solid oxide fuel cell manufactured thereby - Google Patents

Abstract

A method for manufacturing slurry for a solid oxide fuel cell and slurry for a solid oxide fuel cell manufactured thereby are provided. Specifically, a processing time can be shortened by manufacturing the slurry using resonance acoustic mixing, and the slurry manufactured thereby has a high degree of dispersion, so that slurry aggregation does not occur during a tape casting process. Also, the slurry has a low surface roughness, thereby enhancing the quality of a battery employing the slurry.

Description

TECHNICAL FIELD [0001] The present invention relates to a slurry for a solid oxide fuel cell, and a slurry for a solid oxide fuel cell produced by the method. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method for producing a slurry for a solid oxide fuel cell and a slurry for a solid oxide fuel cell produced thereby, and more particularly, to a method for shortening a processing time and dispersing a slurry using Resonance Acoustic Mixing (RAM) The present invention relates to a slurry for a solid oxide fuel cell and a slurry for a solid oxide fuel cell produced thereby.

Solid Oxide Fuel Cell (SOFC) is an environmentally friendly energy source that can significantly reduce carbon dioxide emissions compared to conventional batteries by using solid oxides with oxygen or hydrogen ion conductivity as an electrolyte. I have. Generally, a solid oxide fuel cell has a structure in which a solid electrolyte and a cathode and an anode are disposed on both sides of the solid electrolyte. Specifically, in the solid oxide fuel cell, air is electrochemically reduced in the air electrode to generate oxygen ions, and the oxygen ions are transferred to the fuel electrode through the solid electrolyte, combined with the fuel injected into the fuel electrode, and electrochemically oxidized Electricity is generated as the electrons move along the external circuit.

The anode of the solid oxide fuel cell mainly has a microstructure of the porous layer in order to improve the electrochemical activity and the electric conductivity through the increase of the reaction area and the decrease in the concentration in the process of hydrogen oxidation to hydrogen ion. Conventionally, a method of preparing a fuel electrode in the form of a pellet and arranging the electrolyte by dipping or spray coating has been used in the production of a solid oxide fuel cell. However, It is difficult to control the shrinkage ratio of the substrate, which causes cracking and peeling. Therefore, currently, a method of manufacturing a dense electrolyte layer by stacking a fuel electrode support and an electrolyte slurry in the form of a sheet by tape casting and stacking the electrolyte slurry is widely used.

However, the ball milling process or the basket milling process, which is performed during the production of the slurry, can be uniformly mixed, but requires a process time of 72 hours or longer.

Korean Patent No. 10-1222867

In order to solve the above-described problems, the present invention is to provide a slurry preparation method for a solid oxide fuel cell capable of shortening the time for slurry production, and a slurry for a solid oxide fuel cell produced thereby.

According to one aspect of the present invention, there is provided a method of manufacturing a slurry, comprising mixing raw material powder, a solvent including a dispersant, a binder and a plasticizer to prepare a slurry, wherein the mixing process is performed using resonance acoustic mixing By weight based on the total weight of the slurry for a solid oxide fuel cell.

The raw material powder may be at least one oxide powder selected from the group consisting of zirconia (Zr), ceria, lanthanum magnesite and bismuth, a metal oxide containing nickel (Ni) Powders and pore-forming agents.

The method may further include preparing the raw material powder and the solvent containing the dispersant by mixing them using resonance acoustic mixing before performing the mixing process.

Wherein the mixing step comprises a first mixing step of mixing the raw material powder and the solvent containing the dispersing agent to form a first mixture, a second mixing step of adding the binder to the first mixture, And a third mixing step of adding the plasticizer to the second mixture and then mixing to form the slurry.

The mixing step may further include adding a ball for grinding to the mixing step of at least one of the first mixing step, the second mixing step and the third mixing step.

The resonance acoustic mixing may be performed by a mixing process at an acceleration of 60 to 80 G.

The resonance acoustic mixing may be performed at an acceleration of 80 G for a time of 3 minutes to 60 minutes.

Another aspect of the present invention provides a slurry for a solid oxide fuel cell, which is produced by mixing a raw material powder, a solvent including a dispersant, a binder and a plasticizer using resonance acoustic mixing.

The method of manufacturing a slurry for a solid oxide fuel cell using resonance acoustic mixing according to the present invention can significantly shorten a manufacturing time compared to a slurry manufacturing method using a conventional ball milling process.

In addition, the slurry for a solid oxide fuel cell produced by the above method has a uniform crushing and dispersing property, so that slurry does not aggregate in a tape casting process and can be easily utilized.

In addition, the slurry for a solid oxide fuel cell manufactured by the above method can lower the surface roughness by uniform mixing and improve the quality of the battery employing the same.

However, the effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a flow chart for explaining a method of manufacturing a slurry for a solid oxide fuel cell according to an embodiment of the present invention.
FIGS. 2A to 2C are images showing the slurry produced in Examples 1, 2, and 3 according to an embodiment of the present invention after drying by tape casting and observing the surface of the tape .
3 is an SEM image showing the surface of a slurry prepared in Comparative Example 1 and Example 1 of the present invention attached to a tape surface and observed with a scanning electron microscope.
4 is an SEM image showing the surface of the slurry prepared in Comparative Example 1 and Example 4 of the present invention observed with a scanning electron microscope.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims. Like reference numerals throughout the specification denote like elements.

In one aspect of the present invention, there is provided a method for producing a solid oxide fuel cell, comprising the steps of mixing a raw material powder, a solvent including a dispersant, a binder and a plasticizer to prepare a slurry, A method for producing a slurry can be provided.

Specifically, the resonance acoustic mixing may be a method of dispersing or mixing particles of the mixture using the principle of acoustic resonance. More specifically, the mixture can be induced to an acoustic resonance state using a natural resonant acoustic frequency capable of refining the particle size constituting the mixture. At this time, the acoustic energy including the resonance acoustic frequency may be accumulated inside the particles constituting the mixture, and the particles may be intrinsically dispersed in the structure or the surrounding medium. Accordingly, by performing the mixing process of the mixture constituting the slurry using resonance acoustic mixing using the above-mentioned principle, it is possible to increase the crushing and dispersing degree of the large particles and aggregated particles produced in the mixing process, The mixing can improve the quality of the slurry.

In one embodiment of the present invention, the resonant acoustic mixing may use a conventional resonance acoustic mixing device, and the resonance acoustic mixing device may include a converter that converts the injected electromagnetic energy into physical vibration and acoustic energy .

The kind of the raw material powder may vary depending on the use of the slurry for a solid oxide fuel cell. Specifically, when the slurry for a solid oxide fuel cell is used for producing a solid electrolyte layer, the raw material powder may include powder for forming a solid electrolyte. Specifically, for example, the powder for forming a solid electrolyte may include a powder of Yttria Stabilized Zirconia (YSZ: (Y ₂ O ₃ ) _x (ZrO ₂ ) _{1 -x} , x = 0.05 to 0.15) , But is not limited thereto. Alternatively, when the slurry for the solid oxide fuel cell is used for producing the anode support layer, the raw material powder may include powder for forming the anode support layer.

In one embodiment of the present invention, the slurry for a solid oxide fuel cell produces a slurry for use in manufacturing an anode support layer, and the raw material powder may be a powder for forming an anode support layer. Specifically, for example, the powder for forming the anode support layer may include a conductive metal oxide powder and a pore-forming agent. The conductive metal oxide may be at least one selected from the group consisting of Ni, Zr, Ce, Ti, Mg, Al, Si, Mn, Fe, Co, Cu, Zn, Mo, Y, Nb, Sn, La, Ta, V, But are not limited to, one or more compounds.

In one embodiment of the present invention, the raw material powder includes at least one oxide powder selected from the group consisting of zirconia (Zr), ceria, lanthanum magnesite (Mn), and bismuth (Bi) (Ni) oxide, and a pore-forming agent. More specifically, the raw material powder may include a yttria stabilized zirconia (YSZ) powder, a nickel oxide (NiO) powder, and a pore-forming agent.

The pore-forming agent may be a conventional material capable of forming a pore structure. Specifically, for example, the pore former may be selected from the group consisting of diethylglycol, polyethylene glycol, polyvinylpyrrolidone (PVP), polyvinylalcohol and polymethylmethacrylate , PMMA), but the present invention is not limited thereto.

In the solvent containing the dispersant, the solvent may be one used for mixing the additives, such as the raw material powder, the dispersant, the binder, and the plasticizer, and for controlling the fluidity of the slurry composition containing the mixture. Specifically, for example, the solvent is selected from among ethanol, toluene, triethylene glycol ethyl ether, ethylene glycol hexyl ether, diethylene glycol ethyl ether, tripropylene glycol methyl ether, ethylene glycol, and xylene But it is not limited thereto.

In the solvent containing the above-mentioned dispersant, the dispersant is used for increasing the dispersibility of the raw material powder mixed with the solvent in the solvent, and a conventional dispersant can be used. For example, the dispersant may include at least one selected from the group consisting of polyethylene glycol ether, alkylsulfonate, polycarboxylate, phosphoric acid ester, and Hypermer ™ KD. .

The binder may be one for increasing the adhesion between the raw material powder and the electrode layer or the electrolyte layer where the slurry is to be disposed. Specifically, for example, the binder may be selected from the group consisting of polyvinylbutyral (PVB), polyvinylalcohol (PVA), polyvinylpyrrolidone, polyethylene glycol, xylene, polyethylene, polypropylene, polystyrene, But is not limited to, at least one selected from the group consisting of lithium, lithium, polycarbonate, polyimide, and ethylcellulose.

The plasticizer may be added to increase the workability and flexibility of the slurry composition to be prepared. Specifically, for example, the plasticizer is selected from the group consisting of dibutyl phthalate (DBP), di-2-ethylhexyl phthalate (DOP), diisononyl phthalate (DINP) Selected from diisodecyl phthalate (DIDP), butyl benzyl phthalate (BBP), glycerol, ethylene glycol, polyethylene glycol, dioctylphthalate, triphenylphosphate, trioylphosphate, polyethylene glycol dimethylether and dimethylformamide But it is not limited thereto.

The slurry can be prepared by mixing the raw material powder, the solvent containing the dispersant, the binder and the plasticizer using a resonance mixing sound.

In one embodiment of the present invention, the method may further include preparing the raw material powder and the solvent containing the dispersant by mixing them using resonance acoustic mixing before performing the mixing process. That is, it is possible to mix only the raw material powder by resonance acoustic mixing before performing the mixing process. This may be achieved by preferentially mixing various raw materials contained in the raw material powder to improve mixing efficiency in a mixing process with a solvent. Further, only the solvent containing the dispersing agent can be prepared by mixing by resonance acoustic mixing. This is to increase the mixing efficiency by uniformly dispersing the dispersant in the solvent and widening the contact range of the raw material powder and the dispersant upon mixing with the raw material powder. In one embodiment of the present invention, the steps of mixing the raw material powder and the solvent containing the dispersant, respectively, by resonance acoustic mixing before performing the mixing process are each performed at an acceleration of 60 to 80 G for 3 to 5 Min. ≪ / RTI >

In one embodiment of the present invention, the mixing process performed in the step of mixing the raw material powder, the solvent including the dispersant, the binder, and the plasticizer to form the slurry may be performed by adding the additives contained in the slurry composition sequentially And then performing a mixing process. Specifically, this is for effectively mixing and dispersing the raw material powder contained in the slurry, the solvent containing the dispersant, the binder, and the plasticizer, and the present invention can provide a tape using a conventional slurry through such a sequential mixing process. The agglomeration of the slurry on the tape surface can be improved during the casting process.

1 is a flow chart for explaining a mixing process of a method for producing a slurry for a solid oxide fuel cell according to an embodiment of the present invention.

Referring to FIG. 1, a first mixing step of mixing the raw material powder and the dispersant-containing solvent to form a first mixture may be performed (S100). That is, a solvent containing the dispersant may be added to the raw material powder, and then the mixture may be mixed by resonance acoustic mixing to form a first mixture. Specifically, it may be to blend in a large surface area upon mixing by adding a binder and a plasticizer by effectively dispersing the raw material powder and the dispersant contained in the solvent in the solvent before adding and mixing the binder and the plasticizer .

Then, a second mixing process may be performed (S200) in which the binder is added to the first mixture mixed in step S100 and then mixed to form a second mixture. That is, the binder may be added to the first mixture in which the raw material powder and the solvent containing the dispersant are mixed, and then the mixture may be mixed by resonance acoustic mixing to form the second mixture. As described above, the raw material powder and the solvent containing the dispersant may be first mixed and dispersed to a certain level, and then the binder may be added to the mixture to improve the aggregation of the slurry.

Thereafter, a third mixing step of adding the plasticizer to the second mixture mixed in step S200 and then mixing to form a slurry may be performed (S300). That is, the plasticizer may be added to the raw material powder, the solvent containing the dispersant, and the second mixture in which the binder is mixed, and then mixed with resonance acoustic mixing to form a slurry. Specifically, it is possible to lower the surface roughness of the slurry as a final product by mixing and adding the plasticizer after mixing the constituent materials constituting the slurry except for the plasticizer, and adding the plasticizer together. More specifically, the present invention can be described in detail through the following embodiments and drawings.

In one embodiment of the present invention, the mixing process using the resonance acoustic mixing may include adding a ball for grinding to at least one of the first mixing process, the second mixing process, and the third mixing process And then mixing them. That is, in the first mixing step, the second mixing step, and the third mixing step, the constituent particles contained in the first mixture, the second mixture, and the third mixture are pulverized so that the mixture is more uniformly pulverized For example. Specifically, for example, the pulverizing ball may include at least one selected from the group consisting of Zr ball, Alumina ball, and stainless ball, but is not limited thereto. In one embodiment of the present invention, the pulverizing boro zirconia balls may be used.

In one embodiment of the invention, the resonant acoustic mixing may be to perform the mixing process at an acceleration of 60 to 80 G. When the accelerations applied to the mixture and the additives included in the mixing process are less than 60 G, uniform mixing of the materials constituting the slurry may not be performed. When the acceleration exceeds 80 G, The microstructure of the prepared slurry particles may be broken or deformed. Thus, resonance acoustic mixing can be performed within the above range.

In one embodiment of the present invention, the resonant acoustic mixing can perform the mixing process for a time of 3 minutes to 60 minutes. If the mixing time of the resonance acoustic mixing is less than 3 minutes, sufficient mixing may not be performed and the dispersion of the raw material powder may be lowered. If the mixing time of the resonance acoustic mixing exceeds 60 minutes, Lt; RTI ID = 0.0 > of < / RTI > Thus, resonance acoustic mixing can be performed within the above range.

According to an embodiment, a process of de-airing the mixed slurry may be additionally performed after the mixing process using the resonance mixing sound is performed. The defoaming process is for removing large and small bubbles contained in the mixed slurry, and can be performed using a conventional defoaming process and a defoaming device. In one embodiment of the present invention, the defoaming process may be performed for about 1 minute at an acceleration of 20G.

Another aspect of the present invention provides a slurry for a solid oxide fuel cell, which is produced by mixing a raw material powder, a solvent including a dispersant, a binder and a plasticizer using resonance acoustic mixing. The raw material powder, the solvent containing the dispersant, the binder and the plasticizer can be referred to the description of the method for producing the slurry for the solid oxide fuel cell described above.

Since the slurry for solid oxide fuel cells is formed through more uniform mixing in a shorter time than a conventional ball milling process using resonance acoustic mixing, it is possible to improve the agglomeration of slurry particles when a slurry such as a tape casting is used. In addition, the slurry for the solid oxide fuel cell can lower the surface roughness.

Specifically, the aggregation of the slurry includes large particles, which means that the additives including the raw powder contained in the slurry are not uniformly mixed. In addition, the low surface roughness means that the particles of the mixture constituting the slurry are relatively small in size, meaning that the additives including the raw material powder contained in the slurry are uniformly mixed. That is, the slurry prepared by the method for producing a slurry for a solid oxide fuel cell of the present invention can improve the performance of the electrode employing the slurry and the battery including the same. Specifically, this can be explained in detail in the following embodiments and drawings.

Hereinafter, exemplary embodiments of the present invention will be described in order to facilitate understanding of the present invention. It should be understood, however, that the following examples are intended to aid in the understanding of the present invention and are not intended to limit the scope of the present invention.

<Examples>

Example 1: Synthesis of slurry using resonance acoustic mixing (mixing process 3 times)

(Hypermer KD-1) was added to a mixed solvent of ethanol and toluene, and the mixture was stirred at 80 G for 3 minutes using a resonance acoustic mixer. (SUNPMMA-S50C) as a pore-forming agent and a powder mixed with nickel oxide (NiO) and yttria-stabilized zirconia (TZ-8Y) were mixed at an acceleration of 80G for about 5 minutes using a resonance acoustic mixer Respectively.

The mixed raw material powder was added to a solvent containing the mixed dispersant, zirconia balls were further added thereto, and the mixture was mixed at 80 G acceleration for 5 minutes using a resonance acoustic mixer to form a first mixture Mixing process). PVB (PVB 79) as a binder was added to the first mixture, followed by mixing at 80 G acceleration for 3 minutes using a resonance acoustic mixer to form a second mixture (second mixing step). DBP as a plasticizer was added to the second mixture, followed by mixing at 80G acceleration for 3 minutes to prepare a slurry (third mixing step). The zirconia balls were removed from the prepared slurry and degassed for about 1 minute.

Example 2: Preparation of slurry using resonance acoustic mixing (mixing step 1)

(Hypermer KD-1) and DBP (plasticizer) were added to a mixed solvent of ethanol and toluene, and the mixture was stirred at 80 G for 3 minutes using a resonance acoustic mixer. PVB as a raw material powder and a binder including PMMA (SUNPMMA-S50C) as a powder and pore forming agent mixed with nickel oxide (NiO) and yttria stabilized zirconia (TZ-8Y), and zirconia balls were added, And mixed at an acceleration of 80G for 5 minutes using a mixer.

The mixture of the raw material powders and the PVB was added to a solvent in which the dispersant and DBP were mixed, and the mixture was mixed at 80G acceleration for 10 minutes using a resonance acoustic mixer to prepare a slurry. The zirconia balls were removed from the prepared slurry and degassed for about 1 minute.

Example 3: Preparation of a slurry using resonance acoustic mixing (two mixing steps)

The process of mixing the solvent containing the dispersant and the raw material powder in Example 1 was carried out in the same manner.

The mixed raw material powder and zirconia balls were added to a solvent in which the dispersant was mixed, and then the mixture was mixed with a resonance acoustic mixer at 80G for 5 minutes to form a first mixture. PVB and DBP were added to the first mixture, and the mixture was mixed with a resonance acoustic mixer at 80G acceleration for about 10 minutes to prepare a slurry. The zirconia balls were removed from the prepared slurry and degassed for about 1 minute.

Comparative Example 1: Production of slurry by ball milling

Zirconia balls were added to a mixture of powder of nickel oxide and yttria-stabilized zirconia and powder of PMMA, and a mixture of high-perfume-based dispersant in a solvent containing ethanol and toluene, And mixed by ball milling for 24 hours to form a first mixture. PVB and DBP were added to the first mixture and mixed by ball milling for 24 hours to prepare a slurry. The zirconia balls were removed from the prepared slurry and degassed for about 24 hours.

FIGS. 2A to 2C are images showing the slurry produced in Examples 1, 2, and 3 according to an embodiment of the present invention after drying by tape casting and observing the tape surface. FIG.

2A shows the slurry prepared in Example 1 of the present invention, showing that the surface of the tape was hardly agglomerated, and that the surface roughness was visually low. FIG. 2B relates to the slurry prepared in Example 2 of the present invention, showing that the surface of the tape did not show much aggregation, and the surface roughness was visually high. FIG. 2C relates to the slurry prepared in Example 3 of the present invention, and it can be confirmed that a part of the surface of the tape is agglomerated. FIG. That is, the slurry produced in the embodiment of the present invention through FIGS. 2 (a) to 2 (c) shows a significant improvement in the aggregation phenomenon that occurs during tape casting.

Also, as disclosed in Example 1 of the present invention, a binder may be added to a mixture obtained by mixing a raw material powder and a solvent including a dispersant, and a solvent containing the raw material powder and the dispersant, and mixing the raw material powder, When the mixing step is performed by three mixing steps in which a solvent containing a dispersant and a mixed plasticizer mixed with the binder are added and mixed, that is, the components constituting the slurry are sequentially added to separate the mixing step, It can be seen that the agglomeration phenomenon and the surface roughness of the slurry can be lowered as compared with the case where the slurry is prepared by the mixing step 1 or 2 described in Example 3. As described above, it is expected that the quality and efficiency of the battery employing the slurry prepared by the method for producing a slurry for a solid oxide fuel cell of the present invention can be greatly improved.

3 is an SEM image showing the surface of a slurry prepared in Comparative Example 1 and Example 1 of the present invention attached to a tape surface and observed with a scanning electron microscope.

Referring to FIG. 3, it can be seen that the slurry prepared in Comparative Example 1 of FIG. 3 (a) contains a large amount of aggregated particles. On the other hand, it can be seen that the slurry prepared in Example 1 of Fig. 3 (b) has no aggregated particles at all. That is, the slurry prepared in Example 1 of the present invention was subjected to a mixing process using resonance acoustic mixing, and thus, compared with the slurry prepared in Comparative Example 1 in which the mixing process was performed using a conventional ball milling process, It is judged that homogeneous mixing was carried out without aggregated particles. As a result, it can be confirmed that the method of manufacturing slurry for a solid oxide fuel cell according to the present invention can increase not only shortening of manufacturing process time but also crushing and dispersion by mixing using resonance acoustic mixing.

4 is an SEM image showing the surface of the slurry prepared in Comparative Example 1 and Example 4 of the present invention observed with a scanning electron microscope.

Referring to FIG. 4, it can be seen that the surface of the slurry prepared by the resonance acoustic mixing method in Example 4 of the present invention is better than the surface of the slurry of Comparative Example 1 prepared by mixing by ball milling.

In detail, the slurry prepared in Example 4 of the present invention is mixed using resonance acoustic mixing, whereby the mixture in which the raw material powder and the solvent including the dispersing agent are mixed is more easily broken, And that the surface area is widened by adding 4 to 6 g more binder and plasticizer than the binder and plasticizer added in Comparative Example 1, respectively. That is, although the slurry of Example 4 of the present invention contains more binder and plasticizer than the slurry of Comparative Example 1, it has been found that the slurry of Example 4 has a homogeneous surface with almost no macromolecule and aggregated particles by mixing using resonance acoustic mixing .

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims (8)

Mixing a raw material powder, a solvent containing a dispersant, a binder and a plasticizer to prepare a slurry,
Wherein the mixing is performed using resonance acoustic mixing. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; The method according to claim 1,
The raw material powder may be at least one oxide powder selected from the group consisting of zirconia (Zr), ceria, lanthanum magnesium and bismuth, a metal containing nickel (Ni) Oxide powder and a pore-forming agent. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; The method according to claim 1,
Prior to performing the mixing process,
Further comprising mixing the raw material powder and the solvent containing the dispersant by resonance acoustic mixing to prepare a slurry for a solid oxide fuel cell. The method according to claim 1,
A first mixing step of mixing the raw material powder and the solvent containing the dispersant to form a first mixture;
A second mixing step of adding the binder to the first mixture and then mixing to form a second mixture; And
And a third mixing step of adding the plasticizer to the second mixture and then mixing to form the slurry. 5. The method according to claim 4,
Further comprising the step of adding a ball for grinding to the mixing step of at least one of the first mixing step, the second mixing step and the third mixing step to mix the slurry for a solid oxide fuel cell &Lt; / RTI &gt; The method according to claim 1,
Wherein the resonance acoustic mixing is performed at an acceleration of 60 to 80 G. 6. A method for manufacturing a slurry for a solid oxide fuel cell, The method according to claim 1,
Wherein the resonance acoustic mixing is performed for 3 to 60 minutes. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; A slurry for a solid oxide fuel cell, which is prepared by mixing a raw material powder, a solvent containing a dispersant, a binder and a plasticizer using resonance acoustic mixing.

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