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A kind of conductive paste and preparation method thereof

A technology of conductive paste and conductive materials, applied in the direction of equipment for manufacturing conductive/semiconductive layers, conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, etc., can solve the problem of no reported normal emissivity , Narrow adjustable range of resistance, expensive metal copper and other issues, to achieve the effect of low production cost, good stability and short production cycle

Active Publication Date: 2021-06-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The only similar conductive paste is a copper-containing conductive adhesive reported by Yancheng Institute of Technology CN108624271A, which is obtained by ball milling uniformly with copper powder, phosphosilicate glass, antioxidant and organic carrier, and the resistance is 2.5-6.5MΩ , the resistance adjustable range is narrow and the metal copper is more expensive, and no relevant normal emissivity is reported
In addition, CN103274700A discloses a method for manufacturing ceramic dielectric slurry suitable for screen printing. The ceramic dielectric slurry is wet ball milled for 12 to 48 hours, which takes a long time
Cai Xiaofeng published in "Foshan Ceramics" "Research and Development of High-Efficiency Far-infrared Ceramics and Its Electrothermal Film Elements" through 750°C heat treatment. The emissivity of the electrothermal film element in the wavelength range of 2.5-25um is the highest at 90%, but this material is in the forefront. 24h conductivity attenuation is greater

Method used

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  • A kind of conductive paste and preparation method thereof
  • A kind of conductive paste and preparation method thereof
  • A kind of conductive paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the self-made ceramic powder prepared in this example, 8 mmol of magnesium oxide, 10 mmol of sodium silicate, 8 mmol of aluminum oxide, 9 mmol of titanium sulfate, 16 mmol of boric acid, and 32 mmol of calcium oxide were ground and mixed for 1 hour, and then ground and sieved (200 mesh) , put it into the muffle furnace and raise it to 500°C at 10°C per minute, keep it warm for two hours, and then cool down to room temperature naturally. The total amount of the prepared organic solvent is 100g, and 40g of terpineol and 60g of ethanol are prepared into a solvent system. Then add 7g of antioxidant tea polyphenols, 5g of thickener polyvinyl alcohol, 10g of self-made ceramic powder, 30g of conductive material tin powder and 15g of graphite, mix with a mixer for 3 hours until the slurry is thick. Finally, the conductive paste was screen-printed on the dielectric board with a 40-mesh screen, and the printed dielectric board was placed in a muffle furnace, raised to 400 °C a...

Embodiment 3

[0035]In the self-made ceramic powder prepared in this example, 8 mmol of magnesium oxide, 10 mmol of sodium silicate, 10 mmol of aluminum oxide, 10 mmol of titanium sulfate, 16 mmol of boric acid, and 24 mmol of calcium oxide were ground and mixed for 1 hour, and then ground and sieved (200 mesh) , put it into the muffle furnace and raise it to 500°C at 10°C per minute, keep it warm for two hours, and then cool down to room temperature naturally. The total amount of the prepared organic solvent is 100 g, and 25 g of terpineol and 75 g of ethanol are prepared into a solvent system. Then add 6g of anti-oxidant rosin, 4g of thickener polyvinyl alcohol and 6g of hydroxymethyl cellulose, take another 10g of homemade ceramic powder, 20g of conductive material tin powder and 20g of graphene, mix with a mixer for 6h until the slurry is thick . Finally, the conductive paste was screen-printed on the dielectric board with a 40-mesh screen, and the printed dielectric board was placed i...

Embodiment 4

[0037] The prior art in the table below is Example 1 in CN103274700A.

[0038] The stability test is obtained by connecting the two ends of the dielectric board with the wires of the dual-channel DC regulated power supply to pressurize 20-30V, and cooling for 10-20 minutes. Use a multimeter to test the resistance before and after pressurization, and cycle 2-6 times .

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Abstract

The invention relates to the field of materials, in particular to a high-emissivity lead-free mid-to-far infrared conductive paste and a preparation method and application thereof. In the present invention, the self-made ceramic powder, antioxidant, thickener, diluent and conductive material with medium and low temperature, medium and far infrared high normal emissivity, etc. are developed into a lead-free, medium and far infrared high normal emissivity, long-term stable Conductive paste with high performance and wide application value.

Description

technical field [0001] The present invention relates to the field of materials, in particular to mid-far infrared high normal emissivity lead-free conductive paste and its preparation method and application, more specifically a mid-far infrared high emissivity lead-free far-infrared conductive paste that can be screen-printed And its preparation method and application. Background technique [0002] As a widely applicable functional material, mid-to-far infrared radiation materials have been used in far-infrared heaters, heat-insulating coatings, and food processing. At the same time, with the development of far-infrared ceramic radiation materials, far-infrared technology has been increasingly widely used in food processing, animal and plant cultivation, fuel and water activation, and medical care. Especially now that the pressure of work and life has led to an increase in the number of people in a sub-healthy state, so people are paying more and more attention to their hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B1/24H01B13/00
CPCH01B1/22H01B1/24H01B13/0026
Inventor 宋俊玲黄昭骞潘冬生
Owner JIANGNAN UNIV
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