Bismuth electroplating solution and method for preparing bismuth film through electroplating

Abstract

The invention discloses bismuth electroplating liquid and a preparation method for preparing a bismuth film through electroplating. The bismuth electroplating liquid comprises 0.5-2.0 mol / L of conducting salt, 0.5-3.0 mol / L of nitric acid, 0.50-3.0 mol / L of glycerinum, 0.20-1.0 mol / L of complexing agent and 0.05-0.50 mol / L of bismuth nitrate pentahydrate. According to the bismuth electroplating liquid and the preparation method for preparing the bismuth film through electroplating, a cyanide-free plating solution is adopted for preparation, the performance is stable, green and environment-protecting effects are achieved, the electroplating technology is easy to operate, a bismuth-plated film can be controlled by regulating and controlling pulse parameters and plating solution components and concentration, and the bismuth film with the characteristics of being smooth and bright in surface, low in porosity, good in binding force, easy to control the thickness and the like is prepared.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and in particular relates to a bismuth electroplating solution and a method for preparing a bismuth thin film by electroplating. Background technique [0002] Bismuth is an orthorhombic metal in the transition state, which has both covalent bonds and metal bonds. This structure makes it have a series of special physical and chemical properties, and is widely used in semiconductors, superconducting materials, electroplating, batteries and many other fields. At room temperature, bismuth has oxidation resistance under both dry and wet conditions, and has good resistance to X-rays, high sensitivity and conductivity to heat, so it is often used as a material for preparing X-ray TES absorbers. In recent years, with the development of bismuth industry and people's emphasis on environmental protection, the trend of green, environmental protection and lead-free will provide a good development pros...

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Problems solved by technology

[0003] The electroplating solution is divided into cyanide-containing plating solution and cyanide-free plating solution. Among them, the cyanide-containing plating solution is stable and reliable, has high current efficiency, good dispersion ability and covering ability, and the obtained plating layer is crystallized fine and bright, and is widely used by countries all over the world; but Due to the strong toxicity of cyanide, there are many problems in the working environment and waste liquid treatment. Especially with the improvement of people's environmental awareness, the low-toxicity cyanide-free electroplating technology is gradually getting great attention from all over the world, so the cyanide-free plating solution system It is imperative to promote the research

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