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Process for producing zinc antimonide powder at low temperature

A technology of zinc antimonide and powder, which is applied in the field of material preparation, can solve the problems of large energy consumption, high manufacturing cost, and limited utilization, and achieve the effect of simple equipment and synthesis process and low cost

Inactive Publication Date: 2007-12-05
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to obtain ZnSb materials, high-temperature heat treatment is usually used. This method consumes a lot of energy, and at the same time, the equipment and process are complicated, which makes the manufacturing cost of ZnSb materials higher and the utilization is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A) Weigh 14.377g of ZnSO 4 ·7H 2 O was put into a 1000ml beaker to prepare a 0.05mol / L aqueous solution, and the graphite was used as an electrode to electrolyze metal zinc particles under a DC voltage of 10V, then the metal zinc particles were taken out and put into water to clean the zinc salts adsorbed on the surface, and then placed in Dry in an oven at 80°C for later use;

[0013] B) Weigh 11.405g of antimony trichloride and add it into a beaker containing 1000ml of water under magnetic stirring to make a 0.05mol / L aqueous solution, then slowly add 4.0g of excessive reducing agent sodium borohydride to it, and obtain after the reaction Metal antimony particles, take out the metal antimony particles and put them in water to wash and remove the salt adsorbed on the surface, and then place them in an oven at 80°C to dry for later use;

[0014] C) Weigh 1.65g and 3.05g of the above-mentioned metal zinc and antimony particles according to the atomic ratio of 1:1, mix ...

Embodiment 2

[0016] A) Weigh 28.754g of ZnSO 4 ·7H 2 O was put into a 1000ml beaker to prepare a 0.1mol / L aqueous solution, and the graphite was used as an electrode to electrolyze metal zinc particles under a DC voltage of 10V, then the metal zinc particles were taken out and put into water to clean the zinc salts adsorbed on the surface, and then placed in Dry in an oven at 80°C for later use;

[0017] B) Weigh 22.811g of antimony trichloride and add it into a beaker containing 1000ml of water under magnetic stirring to prepare a 0.1mol / L aqueous solution, then slowly add 8.0g of excess reducing agent sodium borohydride to it, and obtain after the reaction Metal antimony particles, take out the metal antimony particles and put them in water to wash and remove the salt adsorbed on the surface, and then place them in an oven at 80°C to dry for later use;

[0018] C) Weigh 3.27g and 6.09g of the above-mentioned metal zinc and antimony particles according to the atomic ratio of 1:1, mix th...

Embodiment 3

[0020] A) Weigh 143.77g of ZnSO 4 ·7H 2 O was put into a 1000ml beaker to prepare a 0.5mol / L aqueous solution, and the graphite was used as an electrode to electrolyze metal zinc particles under a DC voltage of 10V, and then the metal zinc particles were taken out and put into water to clean the zinc salts adsorbed on the surface, and then placed in Dry in an oven at 80°C for later use;

[0021] B) Weigh 114.055g of antimony trichloride and add it into a beaker containing 1000ml of water under magnetic stirring to prepare a 0.5mol / L aqueous solution, then slowly add 12.0g of excess reducing agent sodium borohydride to it, and obtain after the reaction Metal antimony particles, take out the metal antimony particles and put them in water to wash and remove the salt adsorbed on the surface, and then place them in an oven at 80°C to dry for later use;

[0022] C) Weigh 3.27g and 6.09g of the above-mentioned metal zinc and antimony particles according to the atomic ratio of 1:1, ...

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Abstract

The process of composing ZnSb powder includes the following steps: dissolving zinc sulfate in water to compound solution and electrolysis to produce metal zinc grain dissolving antimony chloride in water to compound solution and reducing with sodium borohydride to obtain metal antimony grain, compounding metal zinc grain and metal antimony grain in the atom ratio of 1 to 1 to form reactant, and heat treating the reactant in an electric furnace at 150-200 deg.c under the protection of nitrogen to produce ZnSb. The process produces ZnSb powder at relatively low temperature, and Compared with available technology, the present invention has the advantages of simple materials, simple apparatus, simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for synthesizing zinc antimonide powder under low temperature conditions. Background technique [0002] Zinc antimonide powder (ZnSb), as a thermoelectric material with excellent performance, can convert thermal energy into electrical energy. As the problem of energy shortage becomes the focus of attention, in order to save energy, people turn their attention to the recovery and utilization of heat energy such as automobile exhaust and waste heat from power plants. So ZnSb gets more and more attention. At present, high-temperature heat treatment is usually used to obtain ZnSb materials. This method consumes a lot of energy, and at the same time, the equipment and process are complicated, which makes the manufacturing cost of ZnSb materials higher and the utilization is limited. In this patent, ZnSb can be obtained at a lower temperature through...

Claims

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Application Information

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IPC IPC(8): B22F9/16
Inventor 赵士超霍德璇吕燕飞
Owner HANGZHOU DIANZI UNIV
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