A kind of preparation method of superfine monodisperse silver-palladium composite powder
A technology of monodisperse and composite powder, which is applied in the field of preparation of ultrafine monodisperse silver-palladium composite powder, can solve the problems of less industrial scale production and less silver-palladium alloy powder, achieve fast reduction speed, low cost, and is suitable for promotion The effect of using
Active Publication Date: 2017-01-04
江苏创卫电电气科技有限公司
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Problems solved by technology
At this stage, there are few domestic research reports on silver-palladium alloy powder, and fewer reports on industrial scale production
Method used
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Embodiment Construction
[0012] The present invention will be further described below in conjunction with embodiment.
[0013] A kind of preparation method of superfine monodisperse silver-palladium composite powder, it is characterized in that comprising the following steps: put silver simple substance, palladium simple substance into nitric acid and mix, after adjusting pH value to 3~5, add polyacrylamide, deionized water , adjust the pH value to 10~12, and use it as a raw material solution; mix hydroxylamine with deionized water, drop the raw material solution into it, and react for 30~50 minutes to obtain it.
[0014] The mass ratio of the silver element to the palladium element is (10-12):1.
[0015] The molar ratio of polyacrylamide to silver is (0.01-0.05):1.
[0016] The reaction is carried out at 15-24° C. for 30-50 minutes.
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The invention relates to a precious metal composite powder material, in particular to a preparation method for superfine monodisperse silver-palladium composite powder. The method is characterized by including the steps of placing silver single substances and palladium single substances into metric acid, mixing the mixture, adding polyacrylamide and deionized water after the ph value is adjusted to 3 to 5, adjusting the ph value to 10 to 12, using the mixture as raw material liquid, mixing hydramine with deionized water, dropping the raw material liquid into the mixture to react for 30 minutes to 50 minutes, and obtaining the precious metal composite powder material. The high-quality precious metal composite powder prepared through the liquid phase is high in purity and low in impurity content, the grain size ranges from about 120 nm to 150 nm, cost is low, operation is convenient, the process is standard and simple, and the preparation method is suitable for application and popularization.
Description
technical field [0001] The invention relates to a precious metal composite powder material, in particular to a preparation method of an ultrafine monodisperse silver-palladium composite powder. Background technique [0002] With its excellent sintering resistance, solderability, migration resistance and moderate price, silver palladium paste is widely used in hybrid integrated circuits as interconnecting conductive strips and welding areas of circuits, and is widely used in chip resistors, MLCC Capacitors, chip inductors and other externally mounted components as electrodes, etc. In recent years, with the rapid development of aerospace, communication technology and artificial intelligence technology, the requirements for multi-function, high reliability and high integration of electronic components have become increasingly fierce, and the thickness of the conductive film is required to be less than 10um. The line width and line spacing requirements are narrower, and it can ...
Claims
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IPC IPC(8): B22F1/00B22F9/24
Inventor 蒋达伟蒋洁张潇潇毛宗宁
Owner 江苏创卫电电气科技有限公司