Composite-material-based thick-film circuit rare earth electrode slurry and preparation process thereof

A technology of rare earth electrode paste and thick film circuit, which is applied to the manufacture of conductive materials, circuits, cables/conductors dispersed in non-conductive inorganic materials, etc. It can solve the slow development of special electronic paste and the low efficiency of dielectric paste preparation , Popularization and application of slow development and other issues, to achieve the effect of intermolecular bond strength and process improvement, energy saving, and promotion of sintering

Inactive Publication Date: 2015-01-28
王晨 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation efficiency of dielectric slurry is low, the electrical performance and wettability are poor, the resistance slurry is single, the stability is not good, the cost is high, the electrode slurry is easy to oxidize, silver ions are easy to migrate under high temperature, and the adhesion is not strong, etc.
Coupled with the lack of intellectual property rights, the popularization and application of this technology has slowed down, and the development of special electronic pastes with high power, high density, and wide temperature coefficient has been even slower, but the prospects are excellent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] 1) Preparation of fine aluminum powder

[0029] Melt the selected aluminum alloy and place it in a fully enclosed high-speed disc atomizer. The molten metal is superheated to 250 degrees Celsius. Under the protection of inert gas, it is cooled rapidly at a rate of 105-107K / S, and atomized to make powder; The atomized aluminum powder is transported from the upper part of the container to the cyclone separator, and then sent to the spray tower with filter screen for gas-solid separation after primary separation. After drying, fine aluminum powder with an average particle size of 3-5 μm is obtained;

[0030] 2) Preparation of glass-ceramic powder

[0031] Mix well-proportioned glass-ceramic powder evenly in a vacuum mixer and put it in a bell furnace for melting; the melting temperature is 800-1200 degrees Celsius, the peak temperature is kept for 1-5 hours, and the glass slag is obtained by water quenching in ionized water; Put glass slag in a star ball mill and grind for ...

Embodiment 1

[0041] This embodiment takes the preparation technology of a Re-alsic rare earth-aluminum silicon carbide (composite ceramic) based high-power LED thick film circuit as a reference example.

[0042] Preparation of rare earth electrode paste for composite material-based thick film circuit:

[0043] 1. According to the technical scheme of the present invention, the glass-ceramic formula: SiO 2 26%, AI 2 o 3 18%, CaO19%, Bi 2 o 3 18%, B 2 o 3 8%, La 2 o 3 1-5%, TiO 2 4%, ZrO 2 2%;

[0044] 2. Glass-ceramic preparation process: heat preservation at 1100°C for 150 minutes;

[0045] 3. Aluminum powder preparation and granulation: Vibration ball mill ball mill → star ball mill → powder particle size ≮3μm;

[0046] 4. Rare earth electrode slurry ingredient formula: particle size of lanthanum and yttrium powder ≮2μm;

[0047] 5. Organic solvent formula dissolution process: 72% terpineol, 9% tributyl citrate, 6% ethyl cellulose, 6% nitrocellulose, 4% hydrogenated castor oi...

Embodiment 2

[0058] This embodiment takes the preparation technology of the electrode paste of the rare earth thick film circuit of the Re-alsic rare earth-aluminum silicon carbide (composite ceramic) based high-power LED as a reference example.

[0059] Electrode paste for Re-alsic rare earth-aluminum silicon carbide (composite ceramic) based high-power LED rare earth thick film circuit series:

[0060] 1. Glass-ceramic formula: SiO 2 32%, AI 2 o 3 18%, CaO15%, Bi 2 o 3 16%, B 2 o 3 9%, La 2 o 3 3%, TiO 2 5%, ZrO 2 2%;

[0061] 2. Glass-ceramic preparation process: heat preservation at 1200°C for 135 minutes.

[0062] 3. Preparation and granulation of aluminum powder: ball milling with vibrating ball mill → star-shaped stirring ball mill → powder particle size ≮3μm;

[0063] 4. The particle size of silver, palladium and yttrium powder is ≮2μm.

[0064] 5. Organic solvent formula dissolution process: terpineol 69%, tributyl citrate 12%, ethyl cellulose 5%, nitrocellulose 5%, ...

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Abstract

The invention discloses composite-material-based thick-film circuit rare earth electrode slurry and a preparation process thereof. The composite-material-based thick-film circuit rare earth electrode slurry is characterized in that the slurry comprises a solid-phase component, an organic solvent carrier and a rare earth oxide; the ratio of the sum of weights of the solid-phase component and the rare earth oxide to the weight of the organic solvent carrier is 70-90% to 30-10%; the weight ratio of silver-aluminum-yttrium composite powder to crystallite glass powder in the solid-phase component is 99.4-94% to 0.6-6%; and in the silver-aluminum-yttrium composite powder, the particle diameters of aluminum powder, silver powder and yttrium powder are smaller than 2 microns, and the weight ratio of aluminum powder to silver powder to yttrium powder is 0.6-10% to 99-82% to 0.4-8%. The composite-material-based thick-film circuit rare earth electrode slurry of the invention has the advantages of good conductive performance, low resistivity, wide temperature coefficient, high compatibility, high applicability, high power density, and high heat tolerance. The slurry is well matched with LED chip substrates and PTCR-xthm electrothermal chip dielectric slurry, has high thermal conductivity, and is green, environment-friendly, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of electrothermal materials, and more specifically relates to a composite material-based thick-film circuit rare earth electrode slurry and a preparation process thereof. Background technique [0002] In the sustainable development strategy established by our country, innovative technology and intellectual property rights are two important factors. At the beginning of the 21st century, DuPont of the United States came to China to develop high-tech barriers. In 2003, domestic scientific research institutions successively launched solar energy and LED electronic pastes, mostly silver pastes for aluminum substrate packaging. Dielectric paste, resistive paste, conductive paste, especially electrode paste are slow to develop due to problems such as technical cost, product quality, and limited variety and narrow application range. The preparation efficiency of dielectric slurry is low, the electrical performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00
Inventor 王晨王克政
Owner 王晨
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