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Nano SnO2/Fe2O3 blending doped silver base electric contact alloy and preparing process thereof

A preparation process and electrical contact technology, applied in the field of nano-hybrid additive composite silver-based electrical contact alloy and its preparation

Inactive Publication Date: 2005-07-06
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technologies have certain limitations in the formability of electrical contact materials, electrical properties, contact burning rate and service life.

Method used

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  • Nano SnO2/Fe2O3 blending doped silver base electric contact alloy and preparing process thereof
  • Nano SnO2/Fe2O3 blending doped silver base electric contact alloy and preparing process thereof
  • Nano SnO2/Fe2O3 blending doped silver base electric contact alloy and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] At 400°C, calcine for 1h to prepare SnO with a nanoparticle size of 5-20nm in a weight ratio of 10:2 2 / Fe 2 o 3 Chemical co-precipitation mixed oxide powder. The weight ratio of 88% Ag powder and 12% SnO 2 / Fe 2 o 3 The hybrid powder is high energy ball milled in an air environment. A vibrating ball mill is used, the ball-to-material ratio is 20:1, the ball milling time is half an hour, and the vibration frequency is 200s-1. The ball-milled powder is cold-pressed at 200-600MPa, hot-pressed and sintered at 550°C and 200MPa. Prepared AgSnO 2 / Fe 2 o 3 The contact alloy is nano SnO 2 / Fe 2 o 3 The particles are uniformly distributed in the Ag matrix.

Embodiment 2

[0026] At 550°C, calcination for 1h to prepare SnO with a nanoparticle size of 20-40nm in a weight ratio of 7:5 2 / Fe 2 o 3Chemical co-precipitation mixed oxide powder. The weight ratio of 88% Ag powder and 12% SnO 2 / Fe 2 o 3 The hybrid powder was high energy ball milled in a nitrogen atmosphere. A stirring high-energy ball mill is used with a ball-to-material ratio of 40:1 and a rotational speed of 300 rpm. The ball milling time was 1 hour. The ball-milled powder is cold-pressed at 100MPa, sintered at 650°C to form a billet, and then re-pressed. Prepared AgSnO 2 / Fe 2 o 3 The contact alloy is nano SnO 2 / Fe 2 o 3 The particles are uniformly distributed in the Ag matrix.

Embodiment 3

[0028] At 750°C, calcine for 1h to prepare SnO with a nanoparticle size of 40-70nm in a weight ratio of 12:5 2 / Fe 2 o 3 Chemical co-precipitation mixed oxide powder. The weight ratio of 88% Ag powder and 12% SnO 2 / Fe 2 o 3 The hybrid powder is high energy ball milled in an air environment. A vibrating ball mill is used, the ball-to-material ratio is 20:1, the ball milling time is 1 hour, and the vibration frequency is 200s-1. The ball-milled powder is cold-pressed at 200-600MPa, hot-pressed and sintered at 650°C and 200MPa. Prepared AgSnO 2 / Fe 2 o 3 The contact alloy is nano SnO 2 / Fe 2 o 3 The particles are uniformly distributed in the Ag matrix.

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Abstract

The invention belongs to a nanometer confounded additive composite silver based electric contact alloy and preparation technique thereof, especially to a component of nanometer SnO2 / Fe3O3 blended silver doped based electric contact alloy electrical contacts material and preparation technique thereof, wherein, co-precipitating and roasting the SnO2 and Fe2O3 chemically for preparing confounded nanometer powder with different granularity, high-energy ball milling the mixed powder of Ag, SnO2 and Fe2O3 in air or nitrogen gas environment, and shaping them. The invention can improve the moldability and electrical property of silver-based electrical contacts material and reduce the contact point burning loss rate and improve its service life.

Description

Technical field: [0001] The invention belongs to a nano-hybrid additive composite silver-based electrical contact alloy and its preparation process, in particular to nano-SnO 2 / Fe 2 o 3 Composition and preparation process of blended doped silver-based electrical contact alloy electrical contact material. Background technique: [0002] Currently known silver-based electrical contact materials are: 1. Prepare nano-SnO by high-energy ball milling 2 Silver-based electrical contact alloy (patent application number 00135475.2); 2. Preparation of nano-SnO by sol-gel method 2 , ZnO, TiO 2 and rare earth components to prepare nano-silver-based electrical contact alloys (patent application number 02146696.3); 3. Use doped metal oxides (including SnO 2 , ZrO, ZnO, TiO, MnO, WO, etc.) silver-based electrical contact alloys (patent application number 03100430.X), and silver-based electrical contact materials that undergo boron or carbon, nitrogen, and boron ternary co-infiltration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C5/06C22C32/00H01H1/02
Inventor 王俊勃杨敏鸽李英民王鹏飞陈立成
Owner XI'AN POLYTECHNIC UNIVERSITY
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