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Water-soluble propenoic-acids adhesive and its preparation method, ceramic slurry composition and preparation method thereof

An acrylic, ceramic slurry technology, applied in the direction of acidic copolymer adhesives, adhesive types, ceramic layered products, etc., can solve the problem of reducing the tensile strength and elongation of ceramic green sheets, reducing dryness, etc. problem, to achieve the effect of shortening drying time and good formability

Inactive Publication Date: 2004-06-30
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, when using the above method, there is a problem that, for example, due to the increase in the amount of water added, the dryness of ceramic green sheets with a thickness of 60 μm or more will be reduced, and thus the ceramic green sheets will be finely divided. Cracks, meanwhile, reduce mechanical properties such as tensile strength and elongation of the ceramic green sheet due to the reduction of the molecular weight of the solid component

Method used

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  • Water-soluble propenoic-acids adhesive and its preparation method, ceramic slurry composition and preparation method thereof
  • Water-soluble propenoic-acids adhesive and its preparation method, ceramic slurry composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0081] (Samples 1 to 18)

[0082] First, weigh barium carbonate (BaW 3 ) and titanium oxide (TiO 2 ), after wet mixing with a ball mill, dehydration and drying. Thereafter, it was calcined at 1000° C. for 2 hours, and then pulverized to obtain ceramic raw coal powder.

[0083] A water-soluble acrylic adhesive was obtained as follows.

[0084] In a 1-liter separable flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and an introduction tube, 230 g of methanol and 35 g of pure water were charged, and 0.42 g of a polymerization initiator AIBN (α-α' azo Diisobutyronitrile), heated to 65°C under nitrogen flow.

[0085] Acrylic acid, which is an unsaturated monomer containing carboxylic acid, and methyl acrylate, which is an alkyl acrylate, are as shown in "Acrylic Acid Amount [% by Weight]" in Tables 1 to 5. Regarding Samples 1 to 11, the former 1.0 g and the latter were mixed at a ratio of 99.0, and about samples 12 to 18, the former was mixed...

Embodiment 2

[0171] Example 2 is an experiment conducted to evaluate the influence of pH on a solid-containing water-soluble acrylic adhesive and the influence of pH on the obtained ceramic slurry composition.

[0172] First, weigh barium carbonate (BaCO 3 ) Titanium oxide (TiO 2 ), after wet mixing with a ball mill, dehydration and drying. Thereafter, it was calcined at 1000° C. for 2 hours, and then pulverized to obtain a ceramic raw material powder.

[0173] A water-soluble acrylic adhesive was obtained as follows.

[0174] In a 1-liter separable flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel and a gas inlet tube, add 200 g of methanol and 50 g of pure water, and at the same time, add 2 g of the polymerization initiator azobis(4-cyanovaleric acid) , heated to 65 °C under nitrogen atmosphere.

[0175] In addition, 5.0 g of acrylic acid as an unsaturated monomer containing carboxylic acid and 95.0 g of methyl acrylate as an alkyl acrylate were mixe...

experiment example 3

[0190] In Experimental Example 3, the ceramic slurry composition made in the above-mentioned Experimental Examples 1 and 2, within the scope of the present invention, is used as a laminated ceramic electronic component to make a figure 2 Multilayer ceramic capacitor 1 of the structure shown.

[0191] Using the ceramic slurry composition of the invention, process a ceramic green sheet with a thickness of 10 μm by doctor blade method, and then dry the ceramic green sheet at 80° C. for 5 minutes. This ceramic green sheet is figure 2 Dielectric ceramic layer 2 formed in .

[0192] Next, an electroconductive paste film was formed by printing an electroconductive paste on a specific main surface of the ceramic green sheet, and then, the electroconductive paste film was dried at 80° C. for 10 minutes. This conductive paste film is figure 2 The conductive film formed in the internal electrode 3.

[0193] Next, 200 ceramic green sheets on which a conductive paste film was formed ...

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Abstract

A ceramic slurry composition contains a mixture of a ceramic raw material powder, a water-soluble acrylic binder and water. A resin component of the water-soluble acrylic binder has a weight average molecular weight of about 10,000 to 500,000 and an inertial square radius in water of about 100 nm or less, and the alcohol content of the water-soluble acrylic binder is about 5% by weight or less when the resin content is 40% by weight. The pH of the ceramic slurry composition is preferably controlled to about 8.5 to 10.

Description

technical field [0001] The present invention relates to a water-soluble acrylic binder used in the production of ceramic green sheets (green bodies) and a production method thereof, a ceramic slurry composition containing the water-soluble acrylic binder and a preferred production method thereof, and A laminated ceramic electronic component manufactured using the ceramic slurry composition and a method of manufacturing the same, especially regarding the improvement of a water-soluble acrylic binder used for slurrying ceramic raw material powder. technical background [0002] According to the requirements of miniaturization, light weight and high density of electronic components, an internal conductor film like an electrode is formed on the ceramic green sheets, and these ceramic green sheets are laminated and pressed together to obtain a green laminate. After compaction, this unprocessed laminated body is fired, so that the ceramic components contained in the ceramic green s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/632B32B38/00C04B35/468C04B35/622C04B35/634C08F6/20C08F20/06C08L33/06C09D133/06C09D133/26
CPCC04B2235/5445C04B35/6263C08L33/06C04B35/6264C04B35/63B32B2309/022C04B2235/3215C04B2237/704C04B35/4682C04B2235/5481C04B35/63424C04B2235/6025C04B2235/608C04B35/62625C04B35/632B32B38/0004C04B35/62218C04B2235/61C09D133/26C09D133/064B32B18/00C04B2235/3236C08F20/06
Inventor 高田雅亲工藤胜宫崎信田中觉
Owner MURATA MFG CO LTD
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