Ultrafine chip high-pressure tantalum powder production process

Abstract

The invention provides an ultrafine chip high-pressure tantalum powder production process. The ultrafine chip high-pressure tantalum powder production process comprises the steps of controlling a sodium reduction process to prepare coarse-granule raw powder in a specific shape, mechanically pulverizing and grading the raw powder, screening out required chip powder, and performing acid pickling, thermal treatment and deoxygenation on the obtained chip powder to obtain finished chip powder. Compared with other disclosed chip tantalum production processes, the ultrafine chip high-pressure tantalum powder production process saves hydrogenation and stirred ball milling chip production processes, thereby being short in technical process, high in recovery rate, low in production cost and safe andenvironmentally friendly in technique.

Description

technical field [0001] The invention relates to a new production process of tantalum powder for capacitors, in particular to a new production process of chip tantalum powder for capacitors. Background technique [0002] Tantalum (Ta) powder is used to manufacture high reliability tantalum electrolytic capacitors. These capacitor elements are used in various fields such as: automation, electronic communication and computers. The latest requirements in these areas: The fundamental properties of tantalum powders must be improved to make it possible to use these components in extreme environments. It is well known that the chemical composition and physical morphology of tantalum powder will have a great influence on the performance of the completed tantalum capacitor, including, for example: withstand voltage, DC leakage current, reliability and equivalent series resistance (ESR). [0003] Currently, most tantalum powders are produced by chemical reduction of potassium fluorot...

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Problems solved by technology

[0008] Chinese patent CN 104858436A relates to a method for preparing tantalum powder for high-reliability and high-capacity electrolytic capacitors, which specifically includes the following steps: raw material tantalum powder preparation, tablet production, pickling and impurity removal, and subsequent treatment of the flaky raw powder. Using hydrogenation and dehydrogenation processes

The raw material of this patent is tantalum powder that has been pretreated by sodium r

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