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A kind of preparation method of ag-yag electric contact material

A technology for electrical contact materials and sheets, applied in chemical instruments and methods, contacts, circuits, etc., can solve problems such as harm to the human body, toxic Cd metal vapor, environmental pollution, etc., and achieve low cost, excellent mechanical properties, and preparation technology. simple effect

Active Publication Date: 2019-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Cd metal vapor is toxic, pollutes the environment and is harmful to the human body

Method used

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  • A kind of preparation method of ag-yag electric contact material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Y(NO 3 ) 3 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O was added to 50ml deionized water to dissolve, so that the total concentration of metal ions in the solution was 0.5mol / L, where Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 ·9H 2 The molar ratio of O is 3:5; then, hexamethylenetetramine is added with sufficient stirring, the amount of which is 2.6g; the reaction is carried out at 85°C in a water bath for 100 minutes to obtain YAG sol; the YAG sol is dried, A dry gel is formed; moved into a muffle furnace and sintered in an air atmosphere: the temperature is raised to 950°C at a rate of 15°C / min, and the temperature is kept for 4 hours to obtain YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 in a ball milling method, they are cold pressed to form a sheet; then the sheet is sintered to obtain an Ag-YAG electrical contact material. The sintering is first heating up The temperature is kept at 500°C for 3 hours; then the temperature is raised to 900°C for 3 hours...

Embodiment 2

[0027] Y(NO 3 ) 3 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O was added to 50ml deionized water to dissolve, so that the total concentration of metal ions in the solution was 0.5mol / L, where Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 ·9H 2 The molar ratio of O is 3:5; then, hexamethylenetetramine is added with sufficient stirring, the amount of which is 4.2g; the reaction is carried out in a water bath at 90°C for 80 minutes to obtain YAG sol; the YAG sol is dried, A dry gel is formed; moved into a muffle furnace and sintered in an air atmosphere: the temperature is raised to 950°C at a rate of 15°C / min, and the temperature is kept for 4 hours to obtain YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 in a ball milling method, they are cold pressed to form a sheet; then the sheet is sintered to obtain an Ag-YAG electrical contact material. The sintering is first heating up The temperature is kept at 500°C for 3 hours; then the temperature is raised to 900°C for 5 hours;...

Embodiment 3

[0029] Y(NO 3 ) 3 ·6H 2 O and Al (NO 3 ) 3 ·9H 2 O was added to 50ml deionized water to dissolve, so that the total concentration of metal ions in the solution was 0.5mol / L, where Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 ·9H 2 The molar ratio of O is 3:5; then, hexamethylenetetramine is added with sufficient stirring, the amount of which is 6.3g; the reaction is carried out at 100°C in a water bath for 70 minutes to obtain YAG sol; the YAG sol is dried, A dry gel is formed; moved into a muffle furnace and sintered in an air atmosphere: the temperature is raised to 950°C at a rate of 15°C / min, and the temperature is kept for 4 hours to obtain YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 in a ball milling method, they are cold pressed to form a sheet; then the sheet is sintered to obtain an Ag-YAG electrical contact material. The sintering is first heating up The temperature is kept at 500°C for 3 hours; then the temperature is raised to 900°C for 3 hours...

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Abstract

The invention relates to preparation of an electric control material and aims to provide a preparation method of an Ag-YAG electric control material. The preparation method comprises the following steps of: adding Y(NO3)3.6H2O and Al(NO3)3.9H2O in deionized water to be dissolved, and adding hexamethylenetetramine while stirring; performing a reaction for 70-100min at 85-100 DEG C to obtain a YAG sol; drying the YAG sol to form a dry gel; sintering the dry gel in an air atmosphere to obtain YAG powder; after mixing the YAG powder with Ag powder by way of ball milling, performing cold pressing and tabletting to prepare sheets; and sintering the sheets to obtain the electric control material. The Ag-YAG composite material obtained by the method can replace AgCdO and can solve the problem thatin the prior art, the preparation temperature of the YAG powder is high, and meanwhile, has the advantages of being simple in preparation process, low in cost and the like. The electric control material prepared by taking yttrium aluminum garnet as a reinforcing material has excellent mechanical properties and electric service life, and has a wide application prospect in the field of low-voltageapparatus. The synthesized YAG particles are of grain size controllable nanoscale, so that the electrical resistivity is reduced favorably and the mechanical properties are enhanced favorably.

Description

Technical field [0001] The present invention relates to the preparation of electrical contact materials, in particular to a preparation method of Ag-YAG electrical contact materials, which can be widely used in power distribution systems, household appliances, transportation and control mechanical equipment. Background technique [0002] The electrical contact element is one of the key elements of electrical equipment, and its function is to switch on and off the current. AgCdO contact material has excellent arc erosion resistance, welding resistance and low contact resistance, and is widely used in a variety of low-voltage electrical appliances from several volts to thousands of volts, and was once called a universal contact. However, Cd metal vapor is toxic, pollutes the environment, and is harmful to the human body. Therefore, all countries are carrying out research on cadmium replacement materials. AgSnO 2 The contact material has excellent arc erosion resistance and weldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05C01F17/00H01H1/0237B82Y40/00
Inventor 杨辉管秉钰张玲洁沈涛吴一凡芮秋枫
Owner ZHEJIANG UNIV
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