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Niobium and indium co-doped nano tin oxide powder preparation and application method

A technology of nano-tin oxide and powder, applied in the direction of tin oxide, oxide conductors, chemical instruments and methods, etc., to achieve the effects of high density, good conductivity and hardness

Active Publication Date: 2018-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above technologies still fail to solve the problem of replacing toxic indium with niobium and improving the density and conductivity of traditional silver tin oxide electrical contact materials under the condition of low silver cost.

Method used

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  • Niobium and indium co-doped nano tin oxide powder preparation and application method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1.Nb-In co-doped SnO 2 Powder synthesis

[0027] molar ratio (NbCl 5 ):(InCl 3 ):(SnCl 4 ·5H 2 O)=0.1:0.6:0.3 Weigh niobium pentachloride (NbCl 5 ), indium trichloride (InCl 3 ) and tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O), put into a beaker and fully dissolve to form a uniform mixed solution, and the NbCl in the mixed solution 5 , InCl 3 and SnCl 4 ·5H 2 The molar percentages of O are 0.1 mol%, 0.6 mol%, and 0.3 mol%, respectively. Then add the complexing agent accounting for 5wt% of the total mass of niobium pentachloride, indium trichloride and tin tetrachloride pentahydrate in the above-mentioned mixed solution, and import in the rotary evaporator and carry out the complexation reaction of metal cation, wherein The complexing agent is citric acid, ethylenediaminetetraacetic acid, oxalic acid. After sufficient complexation, an ammonia solution with a mass concentration of 28 wt.% was added to adjust the pH of the solution, wherein the pH adjustmen...

Embodiment 2

[0032] 1.Nb-In co-doped SnO 2 Powder synthesis

[0033] molar ratio (NbCl5 ):(InCl 3 ):(SnCl 4 ·5H 2 O)=0.3:0.4:0.3 Weigh niobium pentachloride (NbCl 5 ), indium trichloride (InCl 3 ) and tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O), put into a beaker and fully dissolve to form a uniform mixed solution, and the NbCl in the mixed solution 5 , InCl 3 and SnCl 4 ·5H 2 The mole percentages of O are 0.3 mol%, 0.4 mol%, and 0.3 mol%, respectively. Then add the complexing agent accounting for 5wt% of the total mass of niobium pentachloride, indium trichloride and tin tetrachloride pentahydrate in the above-mentioned mixed solution, and import in the rotary evaporator and carry out the complexation reaction of metal cation, wherein The complexing agent is citric acid. After sufficient complexation, an ammonia solution with a mass concentration of 28 wt.% is added to adjust the pH of the solution, wherein the pH adjustment range of the solution is pH=7. After that, the ...

Embodiment 3

[0038] 1.Nb-In co-doped SnO 2 Powder synthesis

[0039] molar ratio (NbCl 5 ):(InCl 3 ):(SnCl 4 ·5H 2 O)=0.5:0.2:0.3 Weigh niobium pentachloride (NbCl 5 ), indium trichloride (InCl 3 ) and tin tetrachloride pentahydrate (SnCl 4 ·5H 2 O), put into a beaker and fully dissolve to form a uniform mixed solution, and the NbCl in the mixed solution 5 , InCl 3 and SnCl 4 ·5H 2 The mole percentages of O are 0.5 mol%, 0.2 mol%, and 0.3 mol%, respectively. Then add the complexing agent accounting for 5wt% of the total mass of niobium pentachloride, indium trichloride and tin tetrachloride pentahydrate in the above-mentioned mixed solution, and import in the rotary evaporator and carry out the complexation reaction of metal cation, wherein The complexing agent is ethylenediaminetetraacetic acid. After sufficient complexation, an ammonia solution with a mass concentration of 28 wt.% is added to adjust the pH of the solution, wherein the pH adjustment range of the solution is p...

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Abstract

The invention relates to nano powder material preparation and application and provides a niobium and indium co-doped nano tin oxide powder preparation and application method. The method includes: taking and adding niobium chloride, indium trichloride and chloride pentahydrate into deionized water, and well dissolving to form uniform mixed solution; adding a complexing agent to perform complexing reaction of metal cations; adopting ammonium hydroxide solution to adjust solution pH value to 7-12, and continuing reaction to form sol; adjusting rotary evaporation temperature, and continuing reaction to form wet gel; drying, and subjecting obtained powder to grinding, screening and sintering to obtain niobium and indium co-doped nano tin oxide powder. By effective modification of tin oxide surface structural characteristics, the foundation is provided for subsequent compounding with a silver substrate, and silver-based electrical contact composite materials can be further improved in density, electricity and hardness performance.

Description

technical field [0001] The invention belongs to the preparation and application of nano powder materials, in particular to the preparation of nano tin oxide powder co-doped with niobium and indium and its application in the preparation of silver-based electrical contact composite materials. Background technique [0002] As an environmentally friendly silver-based electrical contact material commonly used in the field of low-voltage electrical appliances, silver-tin oxide composite materials often suffer from material phase separation and enrichment during service, resulting in deterioration of contact interface performance and failure. Many universities and enterprises have carried out a series of researches on doping and modifying tin oxide, in order to improve the density between silver and tin oxide, interface problems, arc erosion damage and other performance problems. Xi'an Jiaotong University, Zhejiang University, Kunming University of Science and Technology, etc. used...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01G33/00B82Y40/00H01B1/02H01B1/08
CPCB82Y40/00C01G19/02C01G33/006H01B1/02H01B1/08
Inventor 沈涛张玲洁张继杨辉樊先平
Owner ZHEJIANG UNIV
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