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Preparation method for monodisperse plate-like gold powder

A monodisperse, gold powder technology, used in metal processing equipment, transportation and packaging, etc., can solve the problem of not being able to fully meet the requirements of high-end electronic paste, and achieve the effect of good effect, strong operability and simple method.

Active Publication Date: 2016-11-16
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the rapid development of electronic technology, traditional amorphous gold powder can no longer fully meet the requirements of developing high-end electronic paste

Method used

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  • Preparation method for monodisperse plate-like gold powder
  • Preparation method for monodisperse plate-like gold powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The specific content of each substance is: 0.05mol / L of chloroauric acid solution, 1.0mol / L of ascorbic acid, 0.5g / L of linear polyethyleneimine, pH=2.0 of the reducing solution, and the temperature is 40°C. The volume ratio of stock solution is: 1:3.

[0036] Including the following process steps:

[0037] (1) First prepare the chloroauric acid solution and the reducing solution according to the experimental procedures, and adjust the temperature and pH of the reducing solution.

[0038] (2) Under the condition of stirring, slowly add the chloroauric acid solution into the reducing solution, and continue stirring for 60 minutes after adding;

[0039] (3) After repeated washing and freeze-drying of the prepared gold powder, a micron-sized monodisperse flaky gold powder containing partly spherical particles of the present invention is obtained.

[0040] The obtained micron-sized monodisperse flaky gold powder containing part of nearly spherical particles has...

Embodiment 2

[0041] Example 2: The specific content of each substance is: 0.1mol / L of chloroauric acid solution, 2.0mol / L of ascorbic acid, 0.1g / L of linear polyethyleneimine, pH=2.0 of the reducing solution, and the temperature is 40°C. The volume ratio of stock solution is: 1:3.

[0042] Including the following process steps:

[0043] (1) First prepare the chloroauric acid solution and the reducing solution according to the experimental procedures, and adjust the temperature and pH of the reducing solution.

[0044] (2) Under the condition of stirring, slowly add the chloroauric acid solution into the reducing solution, and continue stirring for 60 minutes after adding;

[0045] (3) After repeated washing and freeze-drying of the prepared gold powder, a micron-sized monodisperse flaky gold powder containing partly spherical particles of the present invention is obtained.

[0046] The obtained micron-sized monodisperse flaky gold powder containing part of near-spherical particles has go...

Embodiment 3

[0047] Example 3: The specific content of each substance is: 0.15mol / L of chloroauric acid solution, 1.5mol / L of ascorbic acid, 1.0g / L of linear polyethyleneimine, pH=2.0 of the reducing solution, and the temperature is 40°C. The volume ratio of stock solution is: 1:4.

[0048] Including the following process steps:

[0049] (1) First prepare the chloroauric acid solution and the reducing solution according to the experimental procedures, and adjust the temperature and pH of the reducing solution.

[0050] (2) Under the condition of stirring, slowly add the chloroauric acid solution into the reducing solution, and continue stirring for 60 minutes after adding;

[0051] (3) After repeated washing and freeze-drying of the prepared gold powder, a micron-sized monodisperse flaky gold powder containing partly spherical particles of the present invention is obtained.

[0052]The obtained micron-sized monodisperse flaky gold powder containing part of nearly spherical particles has ...

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Abstract

The invention discloses a preparation method for monodisperse plate-like gold powder, namely the preparation method for micron-grade monodisperse plate-like gold powder containing part of near-spherical particles, and belongs to the field of electronic paste of new materials with an informational function. The method can be used for preparing the micron-grade monodisperse plate-like gold powder containing a small part of the near-spherical particles. The size of the near-spherical particles of the gold powder is about 0.5-0.8 [mu]m, the plate-like gold powder is in the shape of an irregular polygon, the plate diameter is 4-6 [mu]m, and the plate thickness is 300 nm. The gold powder is good in dispersity, moderate in particle size and particle size distribution, good in sintering property and capable of being used for preparing various kinds of gold-based electronic paste and pigment.

Description

technical field [0001] The invention belongs to a method for preparing gold powder, and belongs to the field of electronic paste of information function new materials. Background technique [0002] The continuous renewal and progress of basic materials has become the foundation for the rapid development of electronic technology. High-precision electronic components and equipment have higher requirements for their basic materials. Due to the rapid development of electronic technology, traditional amorphous gold powder cannot fully meet the requirements of developing high-end electronic paste. Micron-sized monodisperse flaky gold powder containing some near-spherical particles is a basic material specially developed for high-end gold-based electronic pastes. In addition, this gold powder can also be used to prepare gold-containing pigments Contents of the invention [0003] The invention provides a method for preparing micron-sized monodisperse flaky gold powder containin...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/068B22F1/065
Inventor 罗慧李世鸿梁云李文琳刘继松李俊鹏
Owner SINO PLATINUM METALS CO LTD
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