Production method for sheet modified conductive nickel powder
A production method and technology of nickel powder are applied in the application field of conductive paste, which can solve the problems of small contact surface of powder particles, high resistivity of powder particles, and high oxygen content on the surface of powder, and achieve stable resistance value of nickel powder and particle size. The effect of uniform and improved electrical performance
Pending Publication Date: 2016-08-10
JIANGSU BOQIAN NEW MATERIALS
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Problems solved by technology
[0004] Usually, the submicron metal nickel powder produced by PVD method is used. The powder is spherical, the powder has a large porosity, the contact surface of the powder particles is small, and the electrical conductivity is poor.
The submicron spherical metal nickel powder produced by PVD method has high oxygen content on the surface of the powder, and dense nickel oxide is formed on the surface of the nickel powder. The nickel oxide is insulating, and the resistivity of the powder particles is high, which leads to , poor electrical performance
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0025] The spherical nickel powder produced by the PVD method (for the conventional method in the industry, such as can be prepared with reference to the method and device disclosed in ZL201110119245.2; can also be directly purchased from commercially available products), using absolute ethanol to prepare a solid content of The slurry with a concentration of 20% is emulsified by an emulsifier and dispersed into a uniform slurry.
[0026] After emulsification, the slurry is sieved through a 400m mesh vibrating sieve to remove particulate impurities.
[0027] The slurry is fed into the sand mill through the metering pump for grinding, and the sand mill is turned on, and the speed is controlled at 1000r / min for grinding.
[0028] During the grinding process, the sand mill is cooled by cooling water, and the cooling temperature is controlled within ≤30°C; continue to grind until the spherical nickel powder becomes flakes, with a thickness-to-diameter ratio of 1:15-20; flake nickel...
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Abstract
The invention provides a production method for sheet modified conductive nickel powder. The production method is characterized by comprising the preparation steps that firstly, spherical nickel powder produced through a PVD method is taken and placed in an organic solvent to prepare slurry, and the slurry is subjected to emulsification dispersing; secondly, the slurry subjected to emulsification dispersing is placed in a sand mill to be milled, the spherical nickel powder is made sheet, and thus sheet nickel powder is formed; and finally, the obtained sheet nickel powder is subjected to hydrogen heating reduction treatment and then cooling, so that the sheet nickel powder is obtained. According to the sheet modified conductive nickel powder prepared through the production method, the resistance value of the nickel powder is reduced, the electrical performance of the sheet nickel powder is improved, the oxygen content of the sheet nickel powder subjected to reduction treatment is smaller than or equal to 2000 ppm, and the resistivity is smaller than or equal to 102 ohm.cm.
Description
technical field [0001] The invention relates to the technical field of ultrafine metal nickel powder modification treatment methods, belongs to the field of application of conductive paste, and in particular relates to a production method of sheet-shaped modified conductive nickel powder. Background technique [0002] At present, conductive paste has been widely used in thick film hybrid integrated circuits, resistors, multilayer ceramic capacitors, resistor networks, surface assembly technology of sensitive components and other electronic industries, and is an important part of electronic information materials. Gold, silver, palladium, iridium, platinum and other precious metals are often used as the first choice for conductive paste due to their excellent properties such as strong stability, high precision, good reliability and long life. However, as the price of precious metals continues to rise in recent years, in order to reduce costs, it is the development trend of con...
Claims
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IPC IPC(8): B22F9/04B22F9/22B22F1/00
CPCB22F9/04B22F9/22B22F2009/045B22F1/068
Inventor 柴立新黄科太宋书清
Owner JIANGSU BOQIAN NEW MATERIALS