A kind of ceramic raw tape and its preparation process

A green tape and ceramic technology, applied in the field of ceramic green tape and its preparation, can solve the problem of low thermal conductivity of the substrate, achieve good thermal conductivity, low sintering densification temperature, and reduce pore defects

Active Publication Date: 2018-12-18
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the addition of a large amount of glass phases in ordinary low-temperature sintered ceramic green tapes, during tape casting, since the ceramic slurry is not under pressure, the ceramic phases in the slurry are randomly distributed and isolated by the glass phase. Low thermal conductivity of the substrate

Method used

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  • A kind of ceramic raw tape and its preparation process
  • A kind of ceramic raw tape and its preparation process
  • A kind of ceramic raw tape and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation technology of ceramic raw tape, such as figure 1 As shown, it mainly includes the following steps:

[0023] According to the total amount of 65g of ceramic material, calculate the amount of alumina powder with a median particle size of 2 μm and alumina powder with a median particle size of 50nm in a volume ratio of 90:10, and weigh them respectively; Ammonium polyacrylate was added to 12.9g of water for initial stirring, and an appropriate amount of ammonia water was added until the pH value was 10; 12g of styrene-acrylic emulsion with a concentration of 48% and 4g of polyvinyl alcohol aqueous solution with a concentration of 20% were stirred and mixed for 2 hours to prepare a mixed Adhesive, then add the prepared adhesive and 5g glycerol into the flask containing the solvent and heat and stir; then add it to the slurry that has been stirred for the first time for secondary stirring; The ratio was added to the slurry prepared above, and ball mille...

Embodiment 2

[0026] A kind of preparation technology of ceramic raw tape, such as figure 1 As shown, it mainly includes the following steps:

[0027] According to the total amount of ceramic material 68g, calculate the consumption of aluminum nitride powder with a median particle diameter of 1 μm and the alumina powder with a median particle diameter of 40nm with a volume ratio of 80:20, and weigh them respectively; Nano-alumina powder and Add 1g of ammonium polyacrylate to 12.7g of water for initial stirring, and add an appropriate amount of ammonia water until the pH value is 10; stir and mix 10g of 48% styrene-acrylic emulsion and 3.5g of 20% polyvinyl alcohol aqueous solution for 2 hours to prepare into a mixed binder, then add the prepared binder and 4.5g glycerol into a flask containing a solvent and heat and stir; then add it to the slurry that has been stirred for the first time for secondary stirring; micron nitrogen Add aluminum powder in proportion to the slurry prepared above,...

Embodiment 3

[0030] A kind of preparation technology of ceramic raw tape, such as figure 1 As shown, it mainly includes the following steps:

[0031] According to the total amount of ceramic material 70g, the amount of alumina powder with a median particle size of 3 μm and glass powder with a median particle size of 40nm is calculated with a volume ratio of 70:30, and weighed respectively; the nano glass powder and 0.9g polymer Ammonium acrylate was added to 12.5g of water for initial stirring, and an appropriate amount of ammonia water was added until the pH value was 10; 9g of styrene-acrylic emulsion with a concentration of 48% and 3.2g of polyvinyl alcohol aqueous solution with a concentration of 20% were stirred and mixed for 2 hours to prepare a mixed Adhesive, then add the prepared adhesive and 4 g glycerol into the flask containing the solvent and heat and stir; then add it to the slurry that has been stirred for the first time for secondary stirring; put micron-sized alumina powde...

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Abstract

The invention relates to a green ceramic tape and a preparing process thereof. The green ceramic tape is prepared by adopting a casting-calendering composite forming process. Solid phase powder of the green ceramic tape includes a mixture of micron powder and nanometer powder. The micron powder is one or more selected from electronic ceramic powder. The nanometer powder is one or more selected from electronic ceramic powder or glass powder. According to the green ceramic tap, the micron powder particles run through continuously at a direction perpendicular to the direction of pressure and are adopted as a skeleton, and a trans-scale micron-nanometer microscopic interconnected structure in gaps of the micron powder particle skeleton is filled with the nanometer powder particles. Through the casting-calendering composite forming process, large particles of the green ceramic tape are communicated with each other, gas pore defects are reduced, and heat conducting capability of a substrate after the green ceramic tape is sintered is greatly improved. In addition, through adding the high-activity nanometer powder, the sintering temperature for densification of the green ceramic tape is reduced. The green ceramic tape is suitable for preparing, at low sintering temperatures, composite ceramic substrate plates having excellent heat conducting properties.

Description

technical field [0001] The invention belongs to the field of preparation of fine ceramics, and in particular relates to a green ceramic belt and a preparation process thereof. Background technique [0002] As the primary material necessary for functional ceramics, ceramic green tape is widely used in electronic packaging, circuit substrates and other fields, and the quality of electronic ceramic products depends largely on the quality of ceramic green tape, so the development of high-performance ceramic green tape has become a The key to the development of functional ceramics. Tape casting is an important forming process for preparing high-performance ceramic green tape materials. This method is to add solvents, binders, plasticizers, etc. Slurry, the slurry is poured on a moving carrier belt, passes through a drying zone to remove all solvents, and is cast into a ceramic green belt of required thickness by controlling the scraper gap. The tape casting process is simple an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/111C04B35/582C04B35/622B28B1/29B28B3/12B28B17/02
CPCB28B1/29B28B3/123B28B17/026C04B35/111C04B35/581C04B35/622C04B2235/3217C04B2235/36C04B2235/5436C04B2235/5454
Inventor 王双喜黄永俊王文君张丹李少杰
Owner SHANTOU UNIV
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