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CN-122010555-A - Environment-friendly MLCC ceramic slurry, film and preparation method

CN122010555ACN 122010555 ACN122010555 ACN 122010555ACN-122010555-A

Abstract

The invention belongs to the technical field of ceramic preparation, and discloses an environment-friendly MLCC ceramic slurry, a film and a preparation method, wherein the preparation method of the environment-friendly MLCC ceramic slurry comprises the steps of carrying out first ball milling and mixing on ceramic powder, a dispersing agent and propylene carbonate to obtain a first mixture, carrying out second ball milling and mixing on an adhesive, propylene carbonate, a plasticizer and the first mixture to obtain a second mixture, and carrying out vacuum defoaming treatment on the second mixture to obtain the environment-friendly MLCC ceramic slurry.

Inventors

  • SUN HONGCHEN
  • HUANG XINDI
  • LUAN PENG
  • WANG SANHONG
  • ZHENG SHUGUANG
  • XU ZHUO

Assignees

  • 江瓷电子(苏州)有限公司

Dates

Publication Date
20260512
Application Date
20260214

Claims (10)

  1. 1. The preparation method of the environment-friendly MLCC ceramic slurry is characterized by comprising the following steps: Performing first ball milling mixing on ceramic powder, a dispersing agent and propylene carbonate to obtain a first mixture, wherein when the first mixture is prepared, the mass ratio of the ceramic powder to the dispersing agent to the propylene carbonate is (90-110) (0.5-1.5) (30-50); mixing the adhesive, propylene carbonate, plasticizer and the first mixture by a second ball mill to obtain a second mixture; And carrying out vacuum defoaming treatment on the second mixture to obtain the environment-friendly MLCC ceramic slurry.
  2. 2. The method for preparing the environment-friendly MLCC ceramic slurry according to claim 1, wherein the ceramic powder comprises one of barium titanate-based material, lead zirconate titanate-based material, aluminum oxide and aluminum nitride; The adhesive comprises one or two of polyvinyl alcohol and polyvinyl acetal resin; The dispersing agent comprises one of glycerol trioleate and fish oil; The plasticizer is citrate.
  3. 3. The method of claim 2, wherein the barium titanate-based material comprises one of Ba(Ti 0.90 Zr 0.05 Hf 0.05 )O 3 、(Ba 0.96 Ca 0.02 Mg 0.02 )(Ti 0.95 Hf 0.05 )O 3 .
  4. 4. The method for preparing an environment-friendly MLCC ceramic slurry according to claim 2, wherein the lead zirconate titanate-based material comprises Pb 0.95 La 0.02 Ce 0.01 (Zr 0.552 Sn 0.416 Ti 0.032 ) O 3 ; The polyvinyl acetal resin includes polyvinyl butyral; the citrate esters include tributyl citrate.
  5. 5. The method for preparing the environment-friendly MLCC ceramic slurry according to claim 1, wherein the first ball milling and mixing time is 10-15 h.
  6. 6. The method for preparing the environment-friendly MLCC ceramic slurry according to claim 1, wherein the mass ratio of the ceramic powder, the dispersing agent and the propylene carbonate is 100:1:40 when preparing the first mixture.
  7. 7. The preparation method of the environment-friendly MLCC ceramic slurry, according to claim 1, is characterized in that when the second mixture is prepared, the mass ratio of the adhesive, the propylene carbonate and the plasticizer is (6-8): (30-40): (3-6); and the second ball milling and mixing time is 13-18 h.
  8. 8. The method for preparing the environment-friendly MLCC ceramic slurry according to claim 1, wherein the time of the vacuum defoaming treatment is 1-3 hours.
  9. 9. An environment-friendly MLCC ceramic slurry, characterized in that the slurry is obtained based on the preparation method of the environment-friendly MLCC ceramic slurry as described in any one of claims 1-8.
  10. 10. An environment-friendly MLCC ceramic film comprising a PET film, wherein the PET film is attached with the environment-friendly MLCC ceramic slurry of claim 9.

Description

Environment-friendly MLCC ceramic slurry, film and preparation method Technical Field The invention relates to the technical field of ceramic preparation, in particular to environment-friendly MLCC ceramic slurry, a film and a preparation method. Background Multilayer ceramic capacitors (MLCCs, multi-layerCeramicCapacitor) are widely used as a key electronic component in consumer electronics, communications, industry, automotive, aerospace, etc. The MLCC has the advantages of small size, high specific volume, high precision and the like, conforms to the trend of miniaturization and light weight of consumer electronics, and has the proportion of more than 90% in the field of ceramic capacitors. The MLCC is prepared by dissolving binder resin in organic solvent to form binder solution, adding the binder solution into dispersed ceramic powder suspension in proportion, ball milling, filtering and defoaming to obtain ceramic slurry, casting the ceramic slurry to obtain stable ceramic dielectric film, printing internal electrodes on the cast ceramic dielectric film, overlapping in a staggered manner, calcining at high temperature, and sealing metal layers (terminal electrodes) at two ends. The casting coating process is a forming method for preparing large-area flat thin ceramic materials, comprising the processes of preparing ceramic slurry, forming, drying and the like, and aims to obtain a ceramic film with enough thinness and stable thickness, and has become an important technology for chip type multilayer ceramic capacitors and ceramic substrates. In the existing casting coating process, a large amount of organic solvents such as toluene and xylene are required to be used for preparing the ceramic slurry, and the organic solvents are high in toxicity and easy to volatilize, so that the ceramic slurry is extremely harmful to the health of operators and can pollute the air. The Chinese patent application with publication number of CN103130511A discloses a ceramic slurry composition containing sec-butyl acetate and application of sec-butyl acetate in preparing the ceramic slurry composition, wherein the sec-butyl acetate is used as a solvent and a dispersing agent of the ceramic slurry, can well dissolve a binding agent and has high stability of dispersing ceramic powder, but the solvent has pungent smell. Chinese patent application publication No. CN111470862a discloses ceramic slurry, a method for preparing ceramic casting film and chip type multilayer ceramic capacitor, in which ethanol is used as solvent of ceramic slurry, but ethanol has pungent smell. Therefore, a new technology capable of solving the problem of poisoning caused by the fact that the organic solvent used in the existing casting coating process is volatile is needed. Disclosure of Invention The invention aims to provide an environment-friendly MLCC ceramic slurry, a film and a preparation method, which can avoid the problems of operator poisoning risk and environmental pollution caused by volatilization of an organic solvent. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, the invention provides a method for preparing environment-friendly MLCC ceramic slurry, comprising the following steps: step 1, performing first ball milling and mixing on ceramic powder, a dispersing agent and propylene carbonate to obtain a first mixture; step 2, carrying out second ball milling mixing on the adhesive, propylene carbonate, plasticizer and the first mixture to obtain a second mixture; And step 3, carrying out vacuum defoaming treatment on the second mixture to obtain the environment-friendly MLCC ceramic slurry. In some embodiments, the ceramic powder comprises one of barium titanate-based material, lead zirconate titanate-based material, aluminum oxide (Al 2O3), aluminum nitride (AlN); The adhesive comprises one or two of polyvinyl alcohol (PVA, polyvinyl Alcohol) and polyvinyl acetal resin (PVB, polyvinyl Butyral); The dispersing agent comprises one of glycerol trioleate and fish oil; The plasticizer is citrate. In some embodiments, the barium titanate-based material comprises one of Ba(Ti0.90Zr0.05Hf0.05)O3、(Ba0.96Ca0.02Mg0.02)(Ti0.95Hf0.05)O3. In some embodiments, the lead zirconate titanate-based material comprises Pb 0.95La0.02Ce0.01(Zr0.552Sn0.416Ti0.032) O3; The polyvinyl acetal resin includes polyvinyl butyral; the citrate esters include tributyl citrate. In some embodiments, when the first mixture is prepared, the mass ratio of the ceramic powder to the dispersant to the propylene carbonate is (90-110): 0.5-1.5): 30-50; the first ball milling and mixing time is 10-15 hours. In some embodiments, the mass ratio of the ceramic powder, dispersant, and propylene carbonate is 100:1:40 when preparing the first mixture. In some embodiments, when preparing the second mixture, the mass ratio of the binder, propylene carbonate and plasticizer is (6-8): 30-40): 3-6; and the second ball