Method for preparing silver micro-powder for high-temperature sintering silver pastes

A technology of high-temperature sintering and silver micropowder, which is applied in the field of preparation of functional silver micropowder, can solve problems such as difficult batch production, difficulty in solid-liquid separation and collection, high energy consumption of high-speed centrifugal separation, etc., and achieve stable industrial production and easy collection and washing , Improve the effect of uniformity
CN101972855AActive Publication Date: 2011-02-16广东羚光新材料股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
广东羚光新材料股份有限公司
Publication Date
2011-02-16

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Abstract

The invention discloses a method for preparing silver micro-powder for high-temperature sintering silver pastes, which comprises the following steps: preparing a colloidal liquid silver system, a colloidal reduction system and protection solution firstly; then mixing the three. In the invention, a sol gel process and a solution chemical reduction method are used to effectively control the reaction process, so that the industrialized production can be performed stably, and the uniform reaction under the condition of production enlarging still can be ensured, thereby greatly improving the uniformities of shapes and other superficial characteristics of silver particles generated by reaction, and eventually generating flocculating soft silver powder wodges which are easy to carry out post-processing such as collecting and washing, and the like.
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Description

technical field

[0001] The invention relates to the preparation of functional silver micropowder, and the preparation method is suitable for industrial large-scale production of silver micropowder. The prepared silver micropowder can be matched and used in proportion to satisfy the preparation of electronic paste. Background technique

[0002] Metal ultrafine powder itself has superior catalytic properties, magnetic properties, electrical properties, etc., so it has more and more applications in aerospace, atomic energy, electronics, powder metallurgy, chemical and other industries, as well as medicine and bioengineering.

[0003] Among them, silver micropowder is widely used in the fields of electronics and electronic materials due to its excellent conductivity and application performance, and has an irreplaceable position in the electronics industry. Silver micropowder is mainly used in the preparation of conductive silver paste. The electronic silver paste series product...

Claims

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