Effect of SnO2 Particle Size on Properties of Ag-SnO2 Electrical Contact Materials Prepared by the Reductive Precipitation Method

2014 ◽  
Vol 936 ◽  
pp. 459-463 ◽  
Author(s):  
Zhi Jie Lin ◽  
Xu Dong Sun ◽  
Shao Hong Liu ◽  
Jia Lin Chen ◽  
Ming Xie ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Particle Size ◽  
Citric Acid ◽  
Electrical Contact ◽  
Precipitation Method ◽  
Precipitation Process ◽  
Composite Powders ◽  
Contact Materials ◽  
Electrical Contact Materials ◽  
Ag Particle

Performances of Ag-SnO2 electrical contact materials can be strongly affected by the microstructure. In this work, Ag-SnO2 composite powders were synthesized by chemical reductive precipitation method. During the precipitation process, Ag particle was deposited onto the surface of SnO2 particle with the assistance of citric acid. The microstructure and properties were analyzed for the prepared Ag-SnO2 electrical contact materials. Our research reveals that the particle size of SnO2 has significant influence on the morphology of the Ag-SnO2 composite powders, and therefore on the microstructure and physical properties of the electrical contact materials. With the decrease of particle size of SnO2, hardness of the Ag-SnO2 electrical contact materials increases, while electrical conductivity decreases.

scholarly journals Synthesis and Processing Techniques of Tungsten Copper Composite Powders for Electrical Contact Materials A Review

2019 ◽  
Vol 35 (2) ◽  
pp. 491-515 ◽  
Author(s):  
Magdalena Valentina Lungu
Keyword(s):  
Metal Salt ◽  
Electrical Contact ◽  
Scale Up ◽  
Synthesis Methods ◽  
Composite Powders ◽  
Contact Materials ◽  
Advantages And Disadvantages ◽  
Synthesis And Processing ◽  
Electrical Contact Materials ◽  
Processing Techniques

This review presents a general survey on synthesis and processing techniques of tungsten copper (W-Cu) composite powders for achieving electrical contact materials for power engineering applications. Several chemical and mechano-chemical synthesis methods for obtaining W-Cu composite powders in nano or micro scales from various W and Cu metal salt precursors combined with hydrogen reduction or nitridation-denitridation processes are reported along with powder metallurgy (PM) techniques employed in manufacturing W-Cu electrical contact materials. The main advantages and disadvantages of synthesis and processing techniques are summarized, too. The interdepencies among the properties of starting materials and final products in relation with synthesis and processing parameters are highlighted. The review reveals that the development of W-Cu advanced materials with improved properties and scale-up potential is of a great interest in practical applications related to materials science and engineering field.

The effects of citric acid on the synthesis and performance of silver–tin oxide electrical contact materials

2014 ◽  
Vol 588 ◽  
pp. 30-35 ◽  
Author(s):  
Zhijie Lin ◽  
Shaohong Liu ◽  
Xudong Sun ◽  
Ming Xie ◽  
Jiguang Li ◽  
...  
Keyword(s):  
Citric Acid ◽  
Tin Oxide ◽  
Electrical Contact ◽  
Contact Materials ◽  
Electrical Contact Materials ◽  
And Performance

scholarly journals Microstructure and properties of silver based cadmium free electrical contact materials

2007 ◽  
Vol 43 (2) ◽  
pp. 171-176 ◽  
Author(s):  
N. Talijan ◽  
V. Cosovic ◽  
Jasna Stajic-Trosic ◽  
A. Grujic ◽  
Dragana Zivkovic ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Mechanical Treatment ◽  
Electrical Contact ◽  
Small Addition ◽  
Experimental Results ◽  
Contact Materials ◽  
Microstructure And Properties ◽  
Simultaneous Study ◽  
Electrical Contact Materials ◽  
Microstructure Density

The presented work covers part of experimental results of simultaneous study of microstructure, density, hardness and electrical conductivity of sintered electrical contact materials based of Ag- SnO2 with 8, 10 and 12 mass% SnO2. The mentioned characteristics were analyzed in the function of different sintering regimes and after additional mechanical treatment (forging and rolling). The influence of small addition of In2O3 (2.9 mass%) on the increase of dispersion of main oxide SnO2 in Ag matrix is observed and presented also.

Study on Mechanical Properties and Physical Properties of Copper Based Electrical Contact Materials Reinforced by CNT

2010 ◽  
Vol 139-141 ◽  
pp. 67-71
Author(s):  
Zhong Quan Guo ◽  
Hao Ran Geng ◽  
Sha Sha Feng
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Physical Properties ◽  
Sliding Wear ◽  
Electrical Contact ◽  
Wear Property ◽  
Contact Materials ◽  
Electrical Contact Materials ◽  
Made In

A new method of carbon nanotube with electroless plating of nickel is proposed. It is shown that in a certain condition, the compacted and well-distributed coating of nickel is obtained without the process of sensitization and activation. Upon the surface treatment of the carbon nanotube, the CNT-consolidated composites for copper-based electrical contact have been made in the way of powder metallurgy. Some important mechanical properties and physical properties, including sliding wear property, electrical conductivity and fusion resistance, were investigated. The experiment results showed that Carbon nanotube inside the composite was uniformly distributed and a proper addition of CNT effectively improves the comprehensive property of the composites. When the carbon nanotube takes up 4vol. % in the material, it is highly effective in improving its sliding wear property and fusion resistance; though its electrical conductivity drops. Its overall properties meet the requirements of electrical contact materials

150-212μm Dust Particles on the Reliability of Electrical Contact in Static Conditions

2013 ◽  
Vol 442 ◽  
pp. 17-21
Author(s):  
Quan Yin ◽  
Sheng Chun Liu ◽  
Liang Jun Xu
Keyword(s):  
Particle Size ◽  
Contact Resistance ◽  
Electrical Contact ◽  
Dust Particles ◽  
Particle Size Range ◽  
Contact Materials ◽  
Static Contact ◽  
Electrical Contact Materials ◽  
Static Conditions ◽  
The Impact

Dust particles from the air in the electrical contact caused more and more problems. To a large extent reduce the reliability of the system. In order to study the impact of these issues, we need to analyze and discuss the dust particles on contact performance of electrical contact materials. In this paper, under static conditions with 150-212μm of the silica particles analyzed and discussed, represented by the pressure difference, particle size, being suppressed will lead to a different location of the static contact resistance and analysis of particle size of the scope of what the content of easily crushed. Experimental results show that the particle size and the location of the different particles are pressed, will make a change in contact resistance, another analysis gives easily be crushed particle size range is 150-300μm.

Microstructure, Hardness and Electrical Conductivity of Silver-Metal Oxides Electrical Contact Materials

2012 ◽  
Vol 486 ◽  
pp. 529-532 ◽  
Author(s):  
Kessaraporn Wathanyu ◽  
Siriporn Rojananan
Keyword(s):  
Electrical Conductivity ◽  
Metal Oxides ◽  
Electrical Contact ◽  
Contact Materials ◽  
Powder Metallurgy Process ◽  
Uniform Dispersion ◽  
Silver Matrix ◽  
Electrical Contact Materials ◽  
Metallurgy Process ◽  
Silver Metal

The aim of this paper was to study the microstructure, hardness and electrical conductivity of silver-metal oxides electrical contact materials. The Ag-SnO2, Ag-ZnO and Ag-CuO were prepared by powder metallurgy process. The density, microstructure, hardness and electrical conductivity were investigated. The results showed that the density of silver-metal oxides were 91-96% of theoretical density. The microstructures exhibited that the metal oxides were uniform dispersion in the silver matrix. The hardness of Ag-(5, 10)SnO2 and Ag-(5, 10)ZnO samples were about 100 HV and the hardness of Ag-(5, 10)CuO samples were about 88 HV. The Ag-5CuO samples had the highest electrical conductivity at the value of 91.27 %IACS.

70-150μm Dust Particles on the Reliability of Electrical Contact in Static Conditions

2013 ◽  
Vol 442 ◽  
pp. 13-16
Author(s):  
Quan Yin ◽  
Sheng Chun Liu ◽  
Liang Jun Xu
Keyword(s):  
Particle Size ◽  
Contact Resistance ◽  
Pressure Difference ◽  
Electrical Contact ◽  
Dust Particles ◽  
Contact Materials ◽  
Static Contact ◽  
Electrical Contact Materials ◽  
Static Conditions ◽  
The Impact

Dust particles from the air in the electrical contact caused more and more problems. To a large extent reduce the reliability of the system. In order to study the impact of these issues, we need to analyze and discuss the dust particles on contact performance of electrical contact materials. In this paper, under static conditions with 70-150μm of the silica particles analyzed and discussed, represented by the pressure difference, particle size, being suppressed will lead to a different location of the static contact resistance and analysis of particle size of the scope of what the content of easily crushed. Experimental results show that the particle size and the location of the different particles are pressed, will make a change in contact resistance.

Material transfer behavior of AgTiB2 and AgSnO2 electrical contact materials under different currents

2017 ◽  
Vol 114 ◽  
pp. 139-148 ◽  
Author(s):  
Hangyu Li ◽  
Xianhui Wang ◽  
Xiuhua Guo ◽  
Xiaohong Yang ◽  
Shuhua Liang
Keyword(s):  
Electrical Contact ◽  
Material Transfer ◽  
Contact Materials ◽  
Transfer Behavior ◽  
Electrical Contact Materials
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