WO2017150438A1 - Pâte électroconductrice, composant électronique et condensateur à base de céramique laminée - Google Patents

Pâte électroconductrice, composant électronique et condensateur à base de céramique laminée Download PDF

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WO2017150438A1
WO2017150438A1 PCT/JP2017/007447 JP2017007447W WO2017150438A1 WO 2017150438 A1 WO2017150438 A1 WO 2017150438A1 JP 2017007447 W JP2017007447 W JP 2017007447W WO 2017150438 A1 WO2017150438 A1 WO 2017150438A1
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Prior art keywords
conductive paste
dispersant
mass
powder
acid
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PCT/JP2017/007447
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English (en)
Japanese (ja)
Inventor
香織 中家
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住友金属鉱山株式会社
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Application filed by 住友金属鉱山株式会社 filed Critical 住友金属鉱山株式会社
Priority to MYPI2018703019A priority Critical patent/MY188260A/en
Priority to KR1020187026479A priority patent/KR102647944B1/ko
Priority to JP2018503286A priority patent/JP6635186B2/ja
Priority to CN201780013785.8A priority patent/CN108780673B/zh
Publication of WO2017150438A1 publication Critical patent/WO2017150438A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/30—Stacked capacitors

Definitions

  • the present invention relates to a conductive paste, an electronic component, and a multilayer ceramic capacitor.
  • Multilayer ceramic capacitors have a structure in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked. By reducing the thickness of these dielectric layers and internal electrode layers, the size and capacity can be reduced. Can be planned.
  • the conductive powder and the organic vehicle are contained under conditions used in combination with a ceramic green sheet having a thickness of 5 ⁇ m or less containing butyral resin, and the solvent in the organic vehicle
  • a conductive paste containing nyl acetate as a main component and having little change in viscosity over time is described.
  • the conductive paste used for the internal electrode may contain a dispersant in order to improve the dispersibility of the conductive powder or the like (for example, Patent Document 3).
  • the conductive powder also tends to have a smaller particle size.
  • the particle size of the conductive powder is small, the specific surface area of the particle surface increases, so that the surface activity of the conductive powder (metal powder) is increased, which may result in a decrease in dispersibility and a decrease in viscosity characteristics. .
  • Patent Documents 1 to 4 describe conductive pastes with little change in viscosity over time. However, as the thickening of the conductive paste over time becomes more problematic as the internal electrode layer becomes thinner, the conductive properties with improved viscosity characteristics have become available as the electrode pattern has become thinner in recent years. A paste is sought.
  • an object of the present invention is to provide a conductive paste that has very little change in viscosity over time and is superior in viscosity stability.
  • a conductive paste containing conductive powder, ceramic powder, a dispersant, a binder resin and an organic solvent, the dispersant containing an acid-based dispersant having a molecular weight of 500 or less, an acid
  • the conductive dispersant is provided with a conductive paste having a branched hydrocarbon group having one or more branched chains.
  • R 1 is a branched alkyl or branched alkenyl group having 10 to 20 carbon atoms having 10 to 20 carbon atoms.
  • the acid-based dispersant is preferably contained in an amount of 0.01 parts by mass or more and 3 parts by mass or less with respect to 100 parts by mass of the conductive powder. Further, it is preferable that the dispersant further contains a base dispersant. The dispersant is preferably contained in an amount of 0.01 parts by mass or more and 3 parts by mass or less with respect to 100 parts by mass of the conductive powder.
  • the conductive powder preferably contains at least one metal powder selected from Ni, Pd, Pt, Au, Ag, Cu, and alloys thereof.
  • the conductive powder preferably has an average particle size of 0.05 ⁇ m or more and 1.0 ⁇ m or less.
  • the ceramic powder preferably contains a perovskite oxide.
  • the ceramic powder preferably has an average particle size of 0.01 ⁇ m or more and 0.5 ⁇ m or less.
  • the binder resin preferably contains at least one of a cellulose resin, an acrylic resin, and a butyral resin.
  • the viscosity immediately after production of the conductive paste is 100%, the viscosity after standing for 60 days is preferably 80% or more and 120% or less.
  • the said electrically conductive paste is for internal electrodes of a multilayer ceramic component.
  • an electronic component formed using the conductive paste is provided.
  • FIG. 1 is a perspective view and a cross-sectional view showing a multilayer ceramic capacitor according to an embodiment.
  • the average particle size of the conductive powder is preferably 0.05 ⁇ m or more and 1.0 ⁇ m or less, more preferably 0.1 ⁇ m or more and 0.5 ⁇ m or less.
  • the average particle diameter of the conductive powder is in the above range, it can be suitably used as a paste for an internal electrode of a thin-film laminated ceramic capacitor, and for example, the smoothness of the dry film and the dry film density are improved.
  • the average particle diameter is a value obtained from observation with a scanning electron microscope (SEM), and refers to a particle diameter having an integrated value of 50% in the particle size distribution.
  • the content of the conductive powder is preferably 30% by mass to 70% by mass and more preferably 40% by mass to 65% by mass with respect to the total amount of the conductive paste.
  • content of electroconductive powder is the said range, it is excellent in electroconductivity and dispersibility.
  • the ceramic powder is not particularly limited.
  • a known ceramic powder is appropriately selected depending on the type of multilayer ceramic capacitor to be applied.
  • the ceramic powder include perovskite oxides containing Ba and Ti, and preferably barium titanate (BaTiO 3 ).
  • 1 type may be used for ceramic powder and 2 or more types may be used for it.
  • ceramic powder containing barium titanate as a main component and oxide as a subcomponent may be used.
  • oxide include oxides composed of one or more selected from Mn, Cr, Si, Ca, Ba, Mg, V, W, Ta, Nb, and rare earth elements.
  • the ceramic powder examples include a perovskite oxide ferroelectric ceramic powder in which Ba atoms and Ti atoms of barium titanate (BaTiO 3 ) are substituted with other atoms, for example, Sn, Pb, Zr, and the like. You can also
  • the ceramic powder in the internal electrode paste a powder having the same composition as that of the dielectric ceramic powder constituting the green sheet of the multilayer ceramic capacitor may be used. Thereby, the generation of cracks due to the shrinkage mismatch at the interface between the dielectric layer and the internal electrode layer in the sintering process is suppressed.
  • ceramic powder include, besides the perovskite oxide containing Ba and Ti, ZnO, ferrite, PZT, BaO, Al 2 O 3 , Bi 2 O 3 , R (rare earth element) 2 O 3. , TiO 2 , Nd 2 O 3 and other oxides.
  • Binder resin It does not specifically limit as binder resin, A well-known resin can be used.
  • the binder resin include cellulose resins such as methyl cellulose, ethyl cellulose, ethyl hydroxyethyl cellulose, and nitrocellulose, butyral resins such as acrylic resins and polyvinyl butyral. Among these, it is preferable to contain ethyl cellulose from the viewpoints of solubility in a solvent and combustion decomposability.
  • One type of binder resin may be used, or two or more types may be used.
  • the molecular weight of the binder resin is, for example, about 20,000 to 200,000.
  • the content of the binder resin is preferably 1 part by mass or more and 10 parts by mass or less, and more preferably 1 part by mass or more and 8 parts by mass or less with respect to 100 parts by mass of the conductive powder.
  • the content of the binder resin is preferably 0.5% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 6% by mass or less with respect to the total amount of the conductive paste.
  • content of binder resin is the said range, it is excellent in electroconductivity and dispersibility.
  • Organic solvent It does not specifically limit as an organic solvent, The well-known organic solvent which can melt
  • organic solvents include dihydroterpinyl acetate, isobornyl acetate, isobornyl propionate, isobornyl butyrate, isobornyl isobutyrate, ethylene glycol monobutyl ether acetate, dipropylene glycol methyl ether acetate, and the like.
  • terpene solvents such as terpineol and dihydroterpineol, saturated aliphatic hydrocarbon solvents such as tridecane, nonane, and cyclohexane.
  • the organic solvent may use 1 type and may use 2 or more types.
  • the organic solvent includes, for example, at least one acetate solvent (A) selected from dihydroterpinyl acetate, isobornyl acetate, isobornyl propionate, isobornyl butyrate and isobornyl isobutyrate. But you can. Among these, isobornyl acetate is more preferable.
  • the organic solvent contains the acetate solvent (A) as a main component, the acetate solvent (A) is preferably contained in an amount of 90% by mass or more and 100% by mass or less, more preferably 100% by mass with respect to the entire organic solvent. Contained.
  • the organic solvent may contain, for example, the above-mentioned acetate solvent (A) and at least one acetate solvent (B) selected from ethylene glycol monobutyl ether acetate and dipropylene glycol methyl ether acetate.
  • A acetate solvent
  • B acetate solvent selected from ethylene glycol monobutyl ether acetate and dipropylene glycol methyl ether acetate.
  • the organic solvent preferably contains 50 mass% or more and 90 mass% or less of the acetate solvent (A) with respect to the entire organic solvent. More preferably, the content is 60% by mass or more and 80% by mass or less.
  • the organic solvent contains 10% by mass to 50% by mass, more preferably 20% by mass to 40% by mass of the acetate solvent (B) with respect to 100% by mass of the whole organic solvent. .
  • the content of the organic solvent is preferably 40 parts by mass or more and 90 parts by mass or less, and more preferably 45 parts by mass or more and 85 parts by mass or less with respect to 100 parts by mass of the conductive powder.
  • the conductivity and dispersibility are excellent.
  • the content of the organic solvent is preferably 20% by mass or more and 50% by mass or less, and more preferably 25% by mass or more and 45% by mass or less with respect to the total amount of the conductive paste.
  • the conductivity and dispersibility are excellent.
  • the electrically conductive paste of this embodiment contains the acid type dispersing agent which has a branched hydrocarbon group.
  • the branched hydrocarbon group of the acid dispersant has one or more branched chains.
  • the acid dispersant preferably has a carboxyl group.
  • the reason is not limited, but the carboxyl group is adsorbed on the surface of the conductive powder, etc., neutralizing the surface potential, or inactivating the hydrogen bonding site, and the site other than the carboxyl group It is surmised that the specific three-dimensional structure as described above can effectively suppress aggregation of the conductive powder and the like, and can further improve the stability of the paste viscosity.
  • the acid dispersant may be a compound having an amide bond.
  • the acid dispersant preferably has a low molecular weight.
  • the low molecular weight acid-based dispersant refers to an acidic dispersant having a molecular weight of 500 or less, for example.
  • the lower limit of the molecular weight is preferably 100 or more, more preferably 200 or more.
  • the said dispersing agent may use 1 type and may use 2 or more types.
  • the hydrocarbon group in the acid-based dispersant may include one branched chain with respect to the main chain, or may include two or more branched chains.
  • the number of branched chains is preferably 1 or more and 3 or less. Further, the number of branched chains may be 4 or more.
  • the acid dispersant may be a mixture containing a plurality of acid dispersants having branched hydrocarbon groups having different branch positions.
  • the paste viscosity stability over time can be further improved.
  • the acid-based dispersant may be an acid-based dispersant having a complicated branched structure (for example, two or more branched chains).
  • a complicated branched structure for example, two or more branched chains.
  • Examples of the acid dispersant as described above include an acid dispersant represented by the following general formula (1).
  • R 1 represents a branched alkyl group having 10 to 20 carbon atoms (or a branched alkenyl group having 10 to 20 carbon atoms).
  • R 1 preferably has 15 to 20 carbon atoms, and more preferably 17 carbon atoms.
  • R 1 may be a branched alkyl group or a branched alkenyl group having a carbon double bond, and is preferably a branched alkyl group.
  • the presence or absence of a branched chain can be confirmed by, for example, the content of the methyl group (—CH 3 ) at the terminal of the hydrocarbon group calculated based on the 13 C-NMR or 1 H-NMR spectrum.
  • the acid dispersant represented by the general formula (1) is a mixture, or when the structure of R 1 in the general formula (1) is a complicated structure having a plurality of branches, There may be a case where a clear peak indicating the R 1 portion is not detected. Even in this case, a peak indicating a terminal methyl group (—CH 3 ) is clearly observed.
  • the content of the acid dispersant is preferably 0.5 parts by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the conductive powder. Yes, more preferably 1 part by mass or more and 2 parts by mass or less.
  • the content of the acid dispersant is preferably small, and the upper limit of the content of the acid dispersant is, for example, 1 part by mass or less. , Preferably it can be 0.5 mass part or less.
  • the conductive paste of this embodiment for example, even when the acid-based dispersant is contained in an amount of 0.1 part by mass or more and 0.5 part by mass or less, the stability of the viscosity with time is sufficiently excellent.
  • the conductive paste may contain a dispersant other than the above acid-based dispersion, for example, an acid-based dispersant having a linear hydrocarbon group.
  • a dispersant other than the above-mentioned acid dispersion include acid dispersants such as higher fatty acids and polymer surfactants. These dispersants may be used alone or in combination of two or more.
  • the higher fatty acid may be an unsaturated carboxylic acid or a saturated carboxylic acid, and is not particularly limited.
  • stearic acid, oleic acid, myristic acid, palmitic acid, linoleic acid, lauric acid, linolenic acid and the like having 11 or more carbon atoms.
  • oleic acid or stearic acid is preferred.
  • alkyl monoamine salt types represented by monoalkylamine salts
  • alkyldiamine salt types represented by N-alkyl (C14 to C18) propylenediamine dioleate.
  • Alkyltrimethylammonium salt type represented by alkyltrimethylammonium chloride
  • Alkyldimethylbenzylammonium salt type represented by coconut alkyldimethylbenzylammonium chloride
  • Quaternary ammonium salt type represented by alkyl dipolyoxyethylenemethylammonium chloride
  • Alkylpyridinium salt type tertiary amine type typified by dimethylstearylamine
  • polyoxyethylene alkylamine type typified by polyoxypropylene / polyoxyethylene alkylamine
  • surfactants selected from oxyethylene addition forms of
  • alkyl monoamine salt type for example, oleoyl sarcosine, which is a compound of glycine and oleic acid, and an amide compound using a higher fatty acid such as stearic acid or lauric acid instead of oleic acid are preferable.
  • the dispersant may include a dispersant other than the acid-based dispersant.
  • examples of the dispersant other than the acid dispersion include a base dispersant, a nonionic dispersant, and an amphoteric dispersant. These dispersants may be used alone or in combination of two or more.
  • the base dispersant examples include aliphatic amines such as laurylamine, rosinamine, cetylamine, myristylamine and stearylamine.
  • the conductive paste contains the above acid-based dispersant having a branched hydrocarbon group and a base-based dispersion, the conductive paste is more excellent in dispersibility and superior in viscosity stability over time.
  • the base dispersant may be contained in an amount of, for example, 0.2 parts by mass or more and 2.5 parts by mass or less, preferably 0.2 parts by mass or more and 1 part by mass or less with respect to 100 parts by mass of the conductive powder. May be.
  • the base dispersant is contained in an amount of about 10 parts by mass to about 300 parts by mass, preferably 50 parts by mass or more and 150 parts by mass with respect to 100 parts by mass of the acid dispersant having the branched hydrocarbon group. be able to.
  • the base dispersion is contained in the above range, the viscosity stability over time of the paste is more excellent.
  • the dispersant other than the acid-based dispersant may be contained in an amount of, for example, 0.2 parts by mass or more and 2.5 parts by mass or less with respect to 100 parts by mass of the conductive powder. Further, the dispersant other than the acid dispersant can be contained in an amount of, for example, about 50 parts by mass or more and 300 parts by mass with respect to 100 parts by mass of the acid dispersant. Moreover, as a whole dispersing agent, it is preferable to contain 0.01 mass part or more and 3 mass parts or less with respect to 100 mass parts of electroconductive powder.
  • the organic solvent for the vehicle is preferably the same as the organic solvent for the paste for adjusting the viscosity of the conductive paste in order to improve the familiarity of the organic vehicle.
  • the content of the organic solvent for the vehicle is, for example, 5 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the conductive powder.
  • the content of the organic solvent for the conductive paste is preferably 10% by mass or more and 40% by mass or less with respect to the total amount of the conductive paste.
  • the conductive paste has a viscosity after standing for 60 days, for example, 70% or more and 130% or less, preferably 80% or more and 120% or less, assuming that the viscosity immediately after the production of the conductive paste is 100%. More preferably, they are 85% or more and 115% or less, More preferably, they are 90% or more and 110% or less.
  • the conductive paste can be suitably used for electronic parts such as multilayer ceramic capacitors.
  • the multilayer ceramic capacitor has a dielectric layer formed using a dielectric green sheet and an internal electrode layer formed using a conductive paste.
  • the dielectric ceramic powder contained in the dielectric green sheet and the ceramic powder contained in the conductive paste have the same composition.
  • the multilayer ceramic device manufactured using the conductive paste of the present embodiment even when the thickness of the dielectric green sheet is, for example, 3 ⁇ m or less, sheet attack and green sheet peeling failure are suppressed.
  • the multilayer ceramic capacitor 1 includes a multilayer body 10 and external electrodes 20 in which dielectric layers 12 and internal electrode layers 11 are alternately stacked.
  • an internal electrode layer 11 made of a conductive paste is formed on a dielectric layer 12 made of a ceramic green sheet by a printing method, and a plurality of dielectric layers having the internal electrode layer on the upper surface are laminated by pressure bonding.
  • the multilayer body 10 is fired and integrated to produce a multilayer ceramic fired body (not shown) that becomes a ceramic capacitor body.
  • the multilayer ceramic capacitor 1 is manufactured by forming a pair of external electrodes at both ends of the ceramic capacitor body. This will be described in more detail below.
  • a ceramic green sheet which is an unfired ceramic sheet.
  • this ceramic green sheet for example, a dielectric layer paste obtained by adding an organic binder such as polyvinyl butyral and a solvent such as terpineol to a predetermined ceramic raw material powder such as barium titanate, a PET film or the like. Examples thereof include a sheet formed on a support film and dried to remove the solvent.
  • the thickness of the dielectric layer made of the ceramic green sheet is not particularly limited, but is preferably 0.05 ⁇ m or more and 3 ⁇ m or less from the viewpoint of the demand for downsizing of the multilayer ceramic capacitor.
  • a plurality of sheets are prepared by printing and applying the above-described conductive paste on one surface of the ceramic green sheet by a known method such as a screen printing method to form the internal electrode layer 11 made of the conductive paste.
  • the thickness of the internal electrode layer 11 made of a conductive paste is preferably set to 1 ⁇ m or less after drying from the viewpoint of a request for thinning the internal electrode layer 11.
  • the ceramic green sheets were peeled off from the support film, and the dielectric layers 12 made of the ceramic green sheets and the internal electrode layers 11 made of the conductive paste formed on one surface thereof were laminated alternately. Then, the laminated body 10 is obtained by heating and pressurizing treatment. In addition, it is good also as a structure which further arrange
  • the organic binder in the green sheet is completely removed, and the ceramic raw material powder is fired to form the ceramic dielectric layer 12. Further, the organic vehicle in the internal electrode layer 11 is removed, and the nickel powder or the alloy powder containing nickel as a main component is sintered or melted and integrated to form an internal electrode.
  • the dielectric layer 12 and the internal electrode A multilayer ceramic fired body in which a plurality of layers 11 are alternately stacked is formed. In addition, annealing may be performed on the fired multilayer ceramic fired body from the viewpoint of taking oxygen into the dielectric layer to improve reliability and suppressing reoxidation of the internal electrode.
  • the multilayer ceramic capacitor 1 is manufactured by providing a pair of external electrodes 20 to the manufactured multilayer ceramic fired body.
  • the external electrode 20 includes an external electrode layer 21 and a plating layer 22.
  • the external electrode layer 21 is electrically connected to the internal electrode layer 11.
  • copper, nickel, or these alloys can be used conveniently, for example.
  • an electronic component other than the multilayer ceramic capacitor can be used.
  • Ceramic powder As the ceramic powder, barium titanate (BaTiO 3 ; particle size 0.06 ⁇ m) was used.
  • Binder resin Ethyl cellulose was used as the binder resin.
  • Table 1 shows the dispersant used.
  • FT-IR Fourier transform infrared spectroscopy
  • Example 1 For 100 parts by mass of Ni powder, which is a conductive powder, 5.3 parts by mass of ceramic powder, 0.1 parts by mass of acid dispersant A, 5 parts by mass of binder resin, and 49 parts by mass of organic solvent are mixed. Thus, a conductive paste was produced. The viscosity (60 days later) of the produced conductive paste was evaluated by the above method. The evaluation results of the amount of change in paste viscosity are shown in Table 2 together with the content of the acid dispersant with respect to 100 parts by mass of Ni powder.
  • Example 2 A conductive paste was prepared in the same manner as in Example 1 except that the content of the acid dispersant A was 0.5 parts by mass. The evaluation results of the amount of change in paste viscosity are shown in Table 2 together with the content of the acid dispersant with respect to 100 parts by mass of Ni powder.
  • Example 3 A conductive paste was prepared in the same manner as in Example 1 except that the content of the acid dispersant A was 1.0 part by mass.
  • Table 2 shows the characteristics of the dispersant used and the evaluation results of the amount of change in paste viscosity, together with the content of the acid dispersant with respect to 100 parts by mass of the Ni powder.
  • Example 5 A conductive paste was produced in the same manner as in Example 1 except that the content of the acid dispersant A was 2.0 parts by mass. The evaluation results of the amount of change in paste viscosity are shown in Table 2 together with the content of the acid dispersant with respect to 100 parts by mass of Ni powder.
  • Example 1 A conductive paste was prepared in the same manner as in Example 1, except that the acid dispersant was oleic acid (Table 1: No. 2, no hydrocarbon group branching). The evaluation results of the amount of change in paste viscosity are shown in Table 2 together with the content of the acid dispersant with respect to 100 parts by mass of Ni powder.
  • Comparative Examples 2 to 4 Comparative Example, except that the content of the acid dispersant (oleic acid) was 0.5 parts by mass (Comparative Example 2), 1 part by mass (Comparative Example 3), and 1.5 parts by mass (Comparative Example 4), respectively.
  • a conductive paste was prepared as in 1. The evaluation results of the amount of change in paste viscosity are shown in Table 2 together with the content of the acid dispersant with respect to 100 parts by mass of Ni powder.
  • Example 6 11.6 parts by mass of ceramic powder and 0.6 parts by mass of dispersant (0.2 parts by mass of acid-based dispersant A, base) with respect to 100 parts by mass of Ni powder (particle size: 0.3 ⁇ m) as conductive powder
  • a conductive paste was prepared by mixing 0.4 part by mass of a dispersant), 5 parts by mass of a binder resin, and 51 parts by mass of an organic solvent.
  • myristylamine was used as the basic dispersant (Table 1: No. 9).
  • the amount of change in viscosity (after 60 days) of the produced conductive paste was evaluated by the above method. The evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • Example 7 A conductive paste was prepared in the same manner as in Example 6 except that the content of the acid dispersant A was 0.5 parts by mass.
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • Example 8 A conductive paste was prepared in the same manner as in Example 6 except that the content of the acid dispersant A was 2.0 parts by mass.
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • Example 9 A conductive paste was produced in the same manner as in Example 7 except that the content of the ceramic powder was 5.3 parts by mass.
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • Example 10 Using Ni powder (particle size: 0.2 ⁇ m), the basic dispersant is myristylamine (Example 10), cetylamine (Example 11), stearylamine (Example 12), and the basic dispersant content is A conductive paste was produced in the same manner as in Example 9 except that the amount was 0.5 parts by weight.
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • a conductive paste was prepared in the same manner as in Example 6 except that 0.3 parts by mass of oleic acid (Comparative Example 11) and 0.3 part by mass of stearic acid (Comparative Example 12) were used as the acid dispersant. .
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • Example 14 A conductive paste was produced in the same manner as in Example 12 except that stearic acid was used as the acid dispersant.
  • the evaluation results of the paste viscosity are shown in Table 3 together with the particle size of the Ni powder and the contents of the dispersant and the ceramic powder.
  • content (mass part) in Table 3 shows the quantity with respect to 100 mass parts of Ni powder.
  • the conductive paste of the present invention is extremely excellent in viscosity stability over time, and is particularly suitable for use as a raw material for internal electrodes of multilayer ceramic capacitors that are chip parts of electronic devices such as mobile phones and digital devices. Can do.

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Abstract

L'invention concerne une pâte électroconductrice, etc., qui a une force d'adhésion exceptionnellement bonne. L'invention concerne entre autres choses une pâte électroconductrice contenant une poudre électroconductrice, une poudre de céramique, un agent dispersant, une résine de liant et un solvant organique, l'agent dispersant comprenant un agent dispersant à base d'acide ayant une masse moléculaire de 500 ou moins, et l'agent dispersant à base d'acide ayant un groupe hydrocarbure ramifié ayant au moins une chaîne ramifiée.
PCT/JP2017/007447 2016-02-29 2017-02-27 Pâte électroconductrice, composant électronique et condensateur à base de céramique laminée WO2017150438A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MYPI2018703019A MY188260A (en) 2016-02-29 2017-02-27 Conductive paste, electronic component, and multilayer ceramic capacitor
KR1020187026479A KR102647944B1 (ko) 2016-02-29 2017-02-27 도전성 페이스트, 전자 부품 및 적층 세라믹 콘덴서
JP2018503286A JP6635186B2 (ja) 2016-02-29 2017-02-27 導電性ペースト、電子部品及び積層セラミックコンデンサ
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JP7508770B2 (ja) 2019-10-31 2024-07-02 住友金属鉱山株式会社 積層セラミックコンデンサ内部電極用の導電性ペースト組成物およびその製造方法、並びに、導電性ペースト
WO2021177420A1 (fr) * 2020-03-04 2021-09-10 住友金属鉱山株式会社 Pâte électriquement conductrice, composant électronique et condensateur céramique stratifié

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