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Method for metalizing aluminum oxide ceramic

An alumina ceramic and metallization technology, applied in the field of alumina ceramic metallization, can solve the problems of uneven composition of slurry, poor sealing strength of materials, insufficient air tightness, etc., to improve fluidity and sealing strength. The effect of increasing and improving viscosity

Active Publication Date: 2018-08-24
HUNAN MEICHENG CERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Mo-Mn method metallization paste formula and process are not well suitable for the metallization of alumina ceramics, and the slurry composition is often uneven, the dispersion is not good, and the thick film after sintering is prone to pores. And microcracks, so that the sealing strength of the material is poor, only about 90MPa, and the airtightness is not good enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A. Additives for preparing ointment: (1) Mix 55wt% of butyl carbitol, 20wt% of tributyl citrate, 12wt% of isobutanol, 10wt% of castor oil and 3wt% of methyl acetate. After ball milling at 48°C for 24 hours, the SA adjuvant was prepared; (2) Terpineol and SA adjuvant were mixed uniformly at a weight ratio of 71:29, and preheated at 100°C for 1.5 hours to prepare a terpineol mixed solvent; (3) ) Preheat the ethyl cellulose at 100°C for 1.5 hours; (4) Stir the terpineol mixed solvent and ethyl cellulose at a weight ratio of 96:4 at 100°C, mix well, and seal after passing through a 500 mesh sieve stand-by;

[0020] B. Preparation of metallized paste: (1) Combine 61wt% Mo, 14wt% Mn, 10wt% Al 2 O 3 , 13wt% SiO 2 , 1wt% CaO, 1wt% TiO 2 After drying, ball milling and mixing, pass through a 360-mesh sieve; (2) Mix it with the paste additive prepared in step A at a weight ratio of 100:28, and ultrasonically disperse for 1 hour, continuously stirring during this period, and store for...

Embodiment 2

[0028] A. Additives for preparing ointment: (1) Mix 60wt% of butyl carbitol, 17wt% of tributyl citrate, 12wt% of isobutanol, 5wt% of castor oil and 6wt% of methyl acetate. After ball milling at 50°C for 20 hours, it was prepared as SA adjuvant; (2) Terpineol and SA adjuvant were mixed uniformly at a weight ratio of 78:22, and preheated at 110°C for 1 hour to prepare a terpineol mixed solvent; (3) ) Preheat the ethyl cellulose at 110°C for 1 hour; (4) Stir the terpineol mixed solvent and ethyl cellulose at a weight ratio of 98:2 at 110°C, mix well, and seal after passing through a 500 mesh sieve stand-by;

[0029] B. Preparation of metallization paste: (1) Combine 75wt% Mo, 9wt% Mn, 6wt% Al 2 O 3 , 8wt% SiO 2 , 1wt% CaO, 1wt% TiO 2 After drying, ball milling and mixing, pass through a 360-mesh sieve; (2) Mix it with the paste additive prepared in step A at a weight ratio of 100:28, and ultrasonically disperse for 2 hours, continuously stirring during this period, and after storing...

Embodiment 3

[0037] A. Additives for preparing paste: (1) Mix 57wt% of butyl carbitol, 18wt% of tributyl citrate, 11wt% of isobutanol, 9wt% of castor oil and 5wt% of methyl acetate. After ball milling at 49°C for 22 hours, the SA adjuvant was formulated; (2) Terpineol and SA adjuvant were mixed uniformly at a weight ratio of 75:25, and preheated at 105°C for 1.3 hours to prepare a terpineol mixed solvent; (3) ) Preheat the ethyl cellulose at 105°C for 1.3 hours; (4) Stir the terpineol mixed solvent and ethyl cellulose at a weight ratio of 97:3 at 106°C, mix well, and seal after passing through a 500 mesh sieve stand-by;

[0038] B. Preparation of metallization paste: (1) Combine 74wt% Mo, 15wt% Mn, 1wt% Al 2 O 3 , 7.2wt% SiO 2 , 1.5wt% CaO, 1.3wt% TiO 2 After drying, ball milling and mixing, pass through a 360-mesh sieve; (2) Mix it with the paste additive prepared in step A at a weight ratio of 100:28, and ultrasonically disperse for 2 hours with constant stirring during storage, and then ul...

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PUM

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Abstract

The invention discloses a method for metalizing aluminum oxide ceramic. The method includes steps of preparing additives for paste; preparing metalizing paste; preparing auxiliary paste; carrying outprimary printing; carrying out pre-sintering; carrying out secondary printing and sintering, and the like. The method has the advantages that the viscosity of slurry can be improved by the aid of SA auxiliaries which are obtained by means of independent research and development, the flowability and the uniformity of metal slurry can be improved, and metal powder can be assuredly uniformly and flatly coated on ceramic surfaces and is effectively compatible with ceramic matrixes; formulas for the metalizing paste are adjusted after the primary printing is carried out, the secondary printing is carried out, glass phase generated by reaction on Mn in the auxiliary paste is migrated towards primary metalized layers during the secondary printing on the basis of the primary printing, and pores, defect locations and the like which are formed during primary metalizing can be filled with the glass phase; the sealing strength of the aluminum oxide ceramic can be improved by 50-60 Mpa by the aid of the method as compared with the traditional metalizing methods, and ceramic metal sealing gas tightness requirements can be effectively met.

Description

Technical field [0001] The invention relates to a method for metallizing alumina ceramics. Background technique [0002] Alumina ceramics have excellent properties such as good electrical insulation, low high-frequency loss, high thermal conductivity, and good air tightness. Alumina ceramics with metallized layers not only have the excellent properties of ceramics, but also have metal characteristics in some local areas, and can be used for ceramic packaging, electronic circuit substrates, LED heat dissipation substrates, etc. The most widely used of the existing alumina ceramic metallization methods is the Mo-Mn method, which is to add Mn and Al to Mo powder 2 O 3 , SiO 2 , MgO, CaO and other glass phase components are mixed uniformly and mixed with a binder to form a paste. After the paste is coated or printed on the ceramic, it is sintered in a reducing atmosphere at 1300-1700°C. The main mechanism of the Mo-Mn method is the glass phase migration. After Mn forms MnO, it inter...

Claims

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Application Information

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IPC IPC(8): C04B41/90
CPCC04B41/009C04B41/52C04B41/90C04B41/5138C04B41/0072C04B35/10
Inventor 方豪杰贺亦文
Owner HUNAN MEICHENG CERAMIC TECH
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