Preparation method of high-purity iridium powder

A high-purity, iridium ammonium salt technology, applied in the field of preparation of high-purity iridium powder, can solve the problems of slow speed and low purity of iridium powder, and achieve the effects of stable product quality, simple process flow and reasonable connection

Pending Publication Date: 2021-10-08
安徽拓思贵金属有限公司
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Problems solved by technology

This method prepares iridium powder speed slowly, and purity is not high

Method used

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  • Preparation method of high-purity iridium powder

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Embodiment Construction

[0027] The technical solutions in the method embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the method embodiments. Obviously, the described embodiments are only part of the embodiments of the method, not all of them. Based on the embodiments in this method, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this method.

[0028] see figure 1 , this method provides a kind of technical scheme: a kind of preparation method of high-purity iridium powder comprises the following steps:

[0029] (1) Clean the iridium-containing material;

[0030] (2) Crushing the iridium-containing material after cleaning;

[0031] (3) Wash and filter the crushed iridium-containing material again;

[0032] (4) Dissolution: Dissolve the iridium-containing material with hydrochloric acid;

[0033] (5) Oxidation and reduction: add nitric acid to the s...

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Abstract

The invention discloses a preparation method of high-purity iridium powder. The preparation method comprises the following steps that (1) cleaning an iridium-containing material; (2) crushing the cleaned iridium-containing material; (3) cleaning and filtering the crushed iridium-containing material again; (4) dissolving; (5) oxidation reduction; (6) oxidation reduction; (7) ion exchange; (8) oxidizing and precipitating; (9) calcining and reducing to obtain metal iridium powder; and (10) boiling and washing with mixed acid, specifically, boiling and washing the iridium powder with a mixed solution of aqua regia and hydrofluoric acid, filtering, fully washing with deionized water, and drying to obtain the high-purity iridium powder. Compared with the prior art, the method has the beneficial effects that the method has the advantages of simple process flow, convenience in operation, reasonable connection among procedures, short period, low cost and stable product quality; and the method is simple in process, and the prepared iridium powder is high in purity.

Description

technical field [0001] The method relates to the technical field of precious metal powder preparation, in particular to a preparation method of high-purity iridium powder. Background technique [0002] The melting point of iridium is as high as 2466°C, and its chemical properties are stable. It can maintain good mechanical properties in an atmosphere above 1600°C, and has good oxidation resistance at high temperatures. It can also withstand strong acids, strong alkalis, molten reagents and High temperature silicate corrosion. Therefore, iridium and its alloys are widely used in high-temperature and corrosion-resistant fields, such as electrical contacts of gas turbines and spacecraft engines, ultra-high temperature thermocouples, crucibles for growing lasers with high melting point single crystal materials, and coatings for rocket engine combustion chambers Type composite nozzle, container of sealed radioactive nuclear fuel in nuclear power plant, spark plug ignition electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26B22F1/00
CPCB22F9/26
Inventor 庞帅王志
Owner 安徽拓思贵金属有限公司
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