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Preparation method of Ag-YAG electric control material

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

Active Publication Date: 2018-01-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method of Ag-YAG electric control material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Set Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in 50ml deionized water, so that the total concentration of metal ions in the solution is 0.5mol / L, wherein Y (NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar ratio of O is 3: 5; then add hexamethylenetetramine under sufficient stirring, and its addition is 2.6g; Under the water bath condition of 85 ℃, react for 100 minutes, obtain YAG sol; YAG sol is dried, Form a xerogel; move into a muffle furnace and sinter in an air atmosphere: raise the temperature to 950° C. at a rate of 15° C. / min, and then keep it for 4 hours to obtain a YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 by ball milling, they are cold-pressed to make sheets; and then the sheets are sintered to obtain Ag-YAG electrical contact materials. To 500°C, keep warm for 3 hours; then raise the temperature to 900°C, keep warm for 3 hours; the heating rate is 15°C / min.

Embodiment 2

[0027] Set Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in 50ml deionized water, so that the total concentration of metal ions in the solution is 0.5mol / L, wherein 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 under sufficient stirring, and its addition is 4.2g; Under the water bath condition of 90 ℃, react for 80 minutes, obtain YAG sol; YAG sol is dried, Form a xerogel; move into a muffle furnace and sinter in an air atmosphere: raise the temperature to 950° C. at a rate of 15° C. / min, and then keep it for 4 hours to obtain a YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 by ball milling, they are cold-pressed to make sheets; and then the sheets are sintered to obtain Ag-YAG electrical contact materials. To 500°C, keep warm for 3 hours; then raise the temperature to 900°C, keep warm for 5 hours; the heating rate is 15°C / min.

Embodiment 3

[0029] Set Y(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in 50ml deionized water, so that the total concentration of metal ions in the solution is 0.5mol / L, wherein 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 under sufficient stirring, and its addition is 6.3g; Under the water bath condition of 100 ℃, react for 70 minutes, obtain YAG sol; YAG sol is dried, Form a xerogel; move into a muffle furnace and sinter in an air atmosphere: raise the temperature to 950° C. at a rate of 15° C. / min, and then keep it for 4 hours to obtain a YAG powder. After mixing YAG powder and Ag powder with a mass ratio of 12:88 by ball milling, they are cold-pressed to make sheets; and then the sheets are sintered to obtain Ag-YAG electrical contact materials. To 500°C, keep warm for 3 hours; then raise the temperature to 900°C, keep warm for 3 hours; the heating rate is 15°C / min.

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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 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 machinery. 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 is widely used in a variety of low-voltage electrical appliances ranging from several volts to thousands of volts due to its excellent arc erosion resistance, welding resistance and low contact resistance. It 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-substituting materials. AgSnO 2 The contact material has excellent resistance to arc erosion and weldin...

Claims

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Application Information

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Patent Type & Authority Applications(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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