Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for nickel-doped nano-stannum oxide (Ni-doped nano-SnO2) powder

A nano-tin oxide and powder technology, applied in the direction of nickel oxide/nickel hydroxide, etc., can solve the problems of miscellaneous products, poor mechanical properties, and low binding force, etc., achieve low hydrothermal reaction temperature, shorten synthesis cycle, The effect of short reaction times

Inactive Publication Date: 2017-03-22
ZHEJIANG UNIV OF TECH
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to SnO 2 own properties, making Ag / SnO 2 The material also has its own shortcomings: (1) high contact resistance, fast temperature rise, (2) SnO 2 Wettability with Ag is poor, the binding force between the two is not high, and the mechanical properties are poor
However, the traditional high-temperature solid-phase synthesis method not only wastes resources, but the product is prone to miscellaneous items, and the product size is large. In the hydrothermal synthesis process, the Oswald ripening principle is used to control the nucleation and growth of crystal grains and reduce sintering. This process shortens the powder synthesis cycle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for nickel-doped nano-stannum oxide (Ni-doped nano-SnO2) powder
  • Preparation method for nickel-doped nano-stannum oxide (Ni-doped nano-SnO2) powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of precursor solution

[0022] Weigh 0.637g SnCl 4 ·5H 2 O and 5.287g Ni(NO 3 ) 2 ·6H 2 O(n Sn :n Ni The molar ratio is 1:10), added to 100mL deionized water to dissolve completely, and pipetted into a 100mL volumetric flask with a glass rod to constant volume, and configured as a transparent precursor solution with a total concentration of 0.2mol / L.

[0023] (2) Preparation of nickel-doped nano-tin oxide powder

[0024] Introduce 0.2mol / L sodium hydroxide solution dropwise into the precursor solution placed in magnetic stirring, adjust the pH value of the mixed solution to 8, form a transparent solution, continue magnetic stirring for 1h, and use the mixed solution obtained by stirring The glass rod was introduced into the reaction kettle, and a white precipitate was obtained after hydrothermal reaction at 180°C for 24 hours. The precipitate was repeatedly washed with ethanol and deionized water to remove excess ions, and dried at 80°C for 2 hour...

Embodiment 2

[0026] (1) Preparation of precursor solution

[0027] Weigh 4.854g SnCl 4 ·5H 2 O and 13.42g Ni(NO 3 ) 2 ·6H 2 O(n Sn :n Ni The molar ratio is 3:10), added to 100mL deionized water to dissolve completely, and pipetted into a 100mL volumetric flask with a glass rod to make up a transparent precursor solution with a total concentration of 0.6mol / L.

[0028] (2) Preparation of nickel-doped nano-tin oxide powder

[0029] Introduce 0.1mol / L sodium hydroxide solution dropwise into the precursor solution placed in magnetic stirring, adjust the pH value of the mixed solution to 9 to form a transparent solution, continue magnetic stirring for 2h, and use the mixed solution obtained by stirring The glass rod was introduced into the reaction kettle, and a white precipitate was obtained after hydrothermal reaction at 150°C for 20 hours. The precipitate was repeatedly washed with ethanol and deionized water to remove excess ions, and dried at 100°C for 4 hours to obtain nickel-doped...

Embodiment 3

[0031] (1) Preparation of precursor solution

[0032] Weigh 4.675g SnCl 4 ·5H 2 O and 7.754g Ni(NO 3 ) 2 ·6H 2 O(n Sn :n Ni The molar ratio is 5:10), added to 100ml deionized water to dissolve completely, and pipetted into a 100mL volumetric flask with a glass rod to constant volume, and configured as a transparent precursor solution with a total concentration of 0.4mol / L.

[0033] (2) Preparation of nickel-doped nano-tin oxide powder

[0034] Introduce 0.3mol / L sodium hydroxide solution dropwise into the precursor solution placed in magnetic stirring, adjust the pH value of the mixed solution to 10, form a transparent solution, continue magnetic stirring for 3h, and use the mixed solution obtained by stirring The glass rod was introduced into the reactor, and a white precipitate was obtained after a hydrothermal reaction at 200°C for 12 hours. The precipitate was repeatedly washed with ethanol and deionized water to remove excess ions, and dried at 90°C for 6 hours to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method for nickel-doped nano-stannum oxide (Ni-doped SnO2) powder, in particular to a preparation method for nickel-doped nano-stannum oxide (Ni-doped SnO2) powder applied in the nanometer electric contact field. Based on that a current AgSnO2 electric contact material is prone to phase separation and phase segregation in the service process, the initial good electric conduction and heat conduction characteristics of the AgSnO2 electric contact material are weakened, and consequently the electricity service life test fails, and it is mainly because SnO2 and Ag are poor in wettability, and the binding force of SnO2 and Ag is not high. Thus, a third element is introduced to improve the binding state between a silver matrix and a stannum oxide reinforcement phase, and meanwhile, by doping a second element Ni, it is facilitated to improve the electric conduction characteristic of SnO2. Thus, a hydrothermal method is adopted for the preparation method to adjust and control a solution pH value, the Ni doping amount, the hydrothermal reaction temperature and other process parameters, the size of the obtained Ni-doped nano-SnO2 nanometer powder is within the range of 2000 nm, the powder is good in dispersibility, and the Ni-doped nano-SnO2 nanometer powder high in phase purity and controllable in morphology is prepared and is applied to the silver-based electric contact material field.

Description

technical field [0001] The invention relates to the preparation of a doped nano powder, in particular to a nickel-doped nano-tin oxide (Ni-doped nano-SnO) applied in the field of nano electric contact. 2 ) powder preparation method. Background technique [0002] The contact system is a key part of electrical products, and its performance is directly related to the quality of electrical products. The traditional contact material Ag / CdO is facing elimination due to its environmental pollution during use, and Ag / SnO 2 As a new environmentally friendly material, it has been widely studied by researchers at home and abroad. But due to SnO 2 own properties, making Ag / SnO 2 The material also has its own shortcomings: (1) high contact resistance, fast temperature rise, (2) SnO 2 The wettability with Ag is poor, the binding force between the two is not high, and the mechanical properties are poor. Existing studies have shown that doping elements can improve Ag and SnO on the on...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G53/04
CPCC01G53/04C01P2002/85C01P2004/03C01P2004/61C01P2004/82
Inventor 杨芳儿郑晓华裘凯锋
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com