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Preparation method of nano AgSn-SnO2 needle-like composite powder

A composite powder and needle-shaped technology, which is applied in the field of preparation of nano-AgSn-SnO2 needle-shaped composite powder, can solve the problems of internal oxidation process influence and cumbersome process, etc.

Pending Publication Date: 2022-02-25
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process of this method is relatively cumbersome and the prepared powder will be formed by other AgSn alloy phases except AgSn solid solution during the atomization cooling process, which will affect the later internal oxidation process.

Method used

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  • Preparation method of nano AgSn-SnO2 needle-like composite powder
  • Preparation method of nano AgSn-SnO2 needle-like composite powder
  • Preparation method of nano AgSn-SnO2 needle-like composite powder

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of nano AgSn-SnO 2针状 Preparation method of composite powder. Concretely implement according to the following steps: configure stannous chloride and dihydrate oxalic acid solution with a concentration of 0.1 mol / L, get 1wt% PVP and add it to dihydrate oxalic acid solution, heat to 60°C in a water bath, and stir under magnetic force Put the stannous chloride solution dropwise into it at a constant speed, keep stirring at 60°C for 2 hours, then take it out for aging at room temperature, wash with ultrapure water and absolute ethanol several times, and dry. Calcined in a muffle furnace at a calcination temperature of 700°C to obtain needle-like SnO 2 .

[0041] Silver nitrate with 86 wt% Ag, stannous chloride with 9 wt% Sn, and 1,10-phenanthroline were added to anhydrous methanol and magnetically stirred. 5wt% SnO 2 Stir and disperse with 15ml of anhydrous methanol and then add it, stir and react under nitrogen atmosphere at room temperature for 2h. After 2 hour...

Embodiment 2

[0043] A kind of nano AgSn-SnO 2针状 The preparation method of the composite powder is specifically implemented according to the following steps: the concentration of the substances in the configuration of stannous sulfate and dihydrate oxalic acid solution is 0.1mol / L, and 1wt% PVP is added to the dihydrate oxalic acid solution, and the water bath is heated to 90 After ℃, the stannous sulfate solution was dripped into it at a constant speed under magnetic stirring, kept at 90 ℃ for 3 hours, then took it out to age at room temperature, washed several times with ultrapure water and absolute ethanol, and dried. Calcined in a muffle furnace at a calcination temperature of 450°C to obtain needle-like SnO 2 .

[0044] Silver nitrate with 88 wt% Ag, stannous octoate with 4 wt% Sn, and 1,10-phenanthroline were added to anhydrous methanol and magnetically stirred. 8wt% SnO 2 Stir and disperse with 15ml of anhydrous methanol and then add it, stir and react under nitrogen atmosphere at...

Embodiment 3

[0046] A kind of nano AgSn-SnO 2针状 The preparation method of the composite powder is specifically implemented according to the following steps: the concentration of the substances in the stannous sulfate and oxalic acid dihydrate solution is 0.1mol / L, and 2wt% PVP is added to the oxalic acid dihydrate solution, and heated to 80°C in a water bath , drop stannous sulfate solution into it at a constant speed under magnetic stirring, keep stirring at 80°C for 4 hours, then take it out for aging at room temperature, wash with ultrapure water and absolute ethanol several times, and dry. Calcined in a muffle furnace at a temperature of 600°C to obtain needle-like SnO 2 .

[0047] Silver nitrate containing 85 wt% Ag, stannous octoate containing 6 wt% Sn, and 1,10-phenanthroline were added to anhydrous methanol and stirred magnetically. 9wt% SnO 2 After stirring and dispersing with 15ml of anhydrous methanol, add it, and react under nitrogen atmosphere at room temperature for 2h. A...

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Abstract

The invention belongs to the technical field of powder preparation, and discloses a preparation method of a nano AgSn-SnO2 needle-like composite powder. Firstly, stannous salt and oxalic acid dihydrate serve as raw materials through a liquid phase coprecipitation method, a surfactant PVP is added, needle-shaped SnO2 is prepared, then absolute methanol serves as a solvent, silver nitrate, a tin-containing compound, 1, 10-phenanthroline and the dispersed needle-shaped SnO2 are stirred to react for 2 h in the solvent at the room temperature in the nitrogen atmosphere, after the reaction, when the temperature of a reaction system is reduced to 0 DEG C through an ice-water bath, a reducing agent is added for a reaction, and the nano AgSn-SnO2 needle-shaped composite powder is obtained. According to the preparation method, the utilization rate of the raw materials can be maximized, and a basis is provided for preparation of the Ag-SnO2 needle-shaped-SnO2 particle composite material with the hybrid structure.

Description

technical field [0001] The invention belongs to the technical field of powder preparation, and the invention relates to a nano AgSn-SnO 2针状 Preparation method of composite powder. Background technique [0002] Ag element itself has high electrical and thermal conductivity, so it is widely used in electrical contact materials. However, Ag has poor welding resistance and is easy to vulcanize, so it is usually chosen to add a second phase to enhance its performance. For Ag-SnO 2 For electrical contact materials, the main preparation methods at present include alloy internal oxidation method, powder metallurgy method and pre-oxidized alloy method. Powder metallurgy uses the prepared metal powder or the mixture of metal powder and non-metal powder as the raw material, and mixes it mechanically. However, compared with the alloy internal oxidation method, the phase-to-phase distribution of the mixed powder is uneven, and the particles The size is large, and agglomeration occurs...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/12C22C5/06H01R43/16C01G19/02
CPCB22F9/24C22C5/06H01R43/16C01G19/02C01P2004/10C01P2004/03Y02E60/10
Inventor 那兆霖王思茹孙旭东
Owner DALIAN UNIV
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