Preparation of Ag/SnO2 Contact Material by Chemical Deposition

2019 ◽  
Vol 394 ◽  
pp. 21-25
Author(s):  
Jun Bo Wang ◽  
Hong Hua Qiu ◽  
Fang Si ◽  
Song Tao Liu ◽  
Norihisa Matsumoto
Keyword(s):  
Vickers Hardness ◽  
Chemical Deposition ◽  
Deposition Process ◽  
Contact Material ◽  
Contact Materials ◽  
Mechanical Stirring ◽  
Micro Morphology ◽  
Ultrasonic Stirring

In order to improve the dispersion of SnO2 in Ag matrix, Ag/SnO2 contact materials wasprepared by optimized chemical deposition process. The micro-morphology and phase of theAg/SnO2 contact materials were tested by metallographic microscope and XRD. The results showedthat the combination of mechanical stirring and ultrasonic stirring can effectively improve thedispersion of SnO2 in Ag matrix, the Vickers hardness, conductivity and density of the Ag/SnO2contact materials with 88% Ag content are 114.4HV, 77.4% IACS and 9.75g/cm3 respectively. Theseprovide data reference for preparation of Ag/SnO2 contact materials with uniform SnO2 distributionin Ag matrix.

Evaluation of Electrical Contact Material Stability on Mercuric Iodide

1993 ◽  
Vol 302 ◽  
Author(s):  
A. Y. Cheng
Keyword(s):  
Free Energy ◽  
Room Temperature ◽  
Electrical Contact ◽  
Radiation Detection ◽  
Electrical Contacts ◽  
Contact Material ◽  
Mercuric Iodide ◽  
Energy Data ◽  
Contact Materials ◽  
Temperature Radiation

ABSTRACTMercuric iodide detectors are leading candidates for room-temperature radiation detection applications. The inherently reactive nature of mercuric iodide limits the number of materials suitable for fabrication of electrical contacts. The theoretical stabilities of elemental contact materials on mercuric iodide were evaluated at 25°C. Additionally, the stabilities of transparent conductive compounds, for photodetector applications, were studied. Calculations were based on Gibbs free energy data, estimates and a series of hypothesized reactions with mercuric iodide. Leading candidate materials were identified and compared to experimental results.

Crystallization Behavior and Electrical Properties of Wet-Chemically Deposited Lead Zirconate Titanate Thin Films

1993 ◽  
Vol 310 ◽  
Author(s):  
S. Merklein ◽  
D. Sporn ◽  
A. SchÖnecker
Keyword(s):  
Electrical Properties ◽  
Lead Zirconate Titanate ◽  
Lead Acetate ◽  
Ferroelectric Properties ◽  
Chemical Deposition ◽  
Deposition Process ◽  
Lead Zirconate ◽  
Lead Acetate Trihydrate ◽  
Acetate Trihydrate ◽  
Wet Chemical

AbstractA wet chemical deposition process for smooth and crackfree films in the system Pb(Zr 1-x Tix)O3 (PZT) has been developed. Final film thicknesses, reached with one coating step, were in the region of 1 μm. Starting from lead acetate trihydrate, zirconium- and titanium-n-propoxide, high molarity (> 2M) coating sols have been prepared that could be handled in air and were stable for more than 170 days.Films with compositions near the morphotropic phase boundary (x=47) and various lead contents were deposited on Pt-coated Si-wafers and Al2O3-substrates by a spin-on method. Wet films could be pyrolyzed and densified with a fast heat treatment without cracking. The crystallization of films into the desired perovskite structure started at comparatively low temperatures (ca. 530 °C) and proceeded rapidly at temperatures above 650 °C. A slight molar excess of lead and a proper heating rate were found to produce films with the best electrical properties. The films on platinized A12O3 substrates showed device-worthy dielectric and ferroelectric properties with typical values for Pn, EC, and ε, of 24 μC/cm2, 4.5 KV/mm and 650, respectively.

scholarly journals Experimental Study on Dynamic Welding of AgW60, CuW60 and Cu Contact Materials in Symmetrical and Asymmetric Pairing at 270VDC/200A

2019 ◽  
Vol 6 (1) ◽  
pp. 10-14
Author(s):  
Y. Liao ◽  
D. Zhang ◽  
M. He ◽  
M. Hasegawa ◽  
Z. Li
Keyword(s):  
Carbon Dioxide ◽  
Contact Material ◽  
Test Device ◽  
Contact Materials ◽  
Dc Voltage ◽  
Welding Properties ◽  
The Relationship ◽  
Welding Force ◽  
Average Average ◽  
Intermediate Effect

<p>With the use of contact material simulating test device, experiments are conducted for the contact materials AgW60, CuW60 and Cu and their different pairing under the conditions of DC voltage and current 270VDC/200A and surrounding atmosphere of carbon dioxide and nitrogen. The welding resistance, average welding force and the relationship between welding force and the number of operations during welding were measured and analyzed. Experiments show that the anti-welding ability of the three materials in the symmetric pairing of carbon dioxide and nitrogen is ranked as AgW60&gt;Cu&gt;CuW60. The "intermediate effect" occurs in the anti-welding properties of the asymmetric pairing. The relationship between the number of operations required for each welding and the average average welding force is approximately an inverse proportional function.</p>

Deposition of palladium films by a novel supercritical fluid transport-chemical deposition process

1991 ◽  
Vol 26 (11) ◽  
pp. 1127-1133 ◽  
Author(s):  
Brooks M. Hybertson ◽  
Brian N. Hansen ◽  
Robert M. Barkley ◽  
Robert E. Sievers
Keyword(s):  
Supercritical Fluid ◽  
Fluid Transport ◽  
Chemical Deposition ◽  
Deposition Process

Fabrication of superhydrophobic Cu surfaces on Al substrates via a facile chemical deposition process

2012 ◽  
Vol 87 ◽  
pp. 43-46 ◽  
Author(s):  
Jinlong Song ◽  
Wenji Xu ◽  
Xin Liu ◽  
Zefei Wei ◽  
Yao Lu
Keyword(s):  
Chemical Deposition ◽  
Deposition Process

A Study on the Development of Environment-Friendly Ag-SnO2 Electric Contact Materials through a Powder Metallurgy

2007 ◽  
Vol 539-543 ◽  
pp. 2761-2766 ◽  
Author(s):  
Hoon Cho ◽  
Duck Young Hwang ◽  
Hyung Ho Jo
Keyword(s):  
Powder Metallurgy ◽  
Manufacturing Process ◽  
Electrical Contact ◽  
Image Analyzer ◽  
Contact Material ◽  
Electric Contact ◽  
Contact Materials ◽  
Grain Distribution ◽  
Sno2 Powder ◽  
Electric Contact Material

It is generally known that Ag-CdO electric contact material excels others in characteristics. Thus, the contact material has been widely used, regardless of current strength. However, in a view point of environment, the advanced electric contact material without environmental load element such as cadmium has to be developed. Extensive studies have been carried out on Ag-SnO2 electric contact material as a substitute of Ag-CdO contact materials. In the manufacturing process of Ag-SnO2 electric contact material, it can be mentioned that typical internal oxidation process is not suitable to produce Ag-SnO2 electric contact material because the Sn located around surface may interrupt oxidation of Sn in the middle of material. Therefore, in the present study, powder metallurgy including compaction and sintering is introduced to solve the incomplete oxidation problems in manufacturing process of Ag-SnO2 electrical contact material. The formation of the blends was manufactured by wet blending of powders of Ag and SnO2. The quantity of SnO2 powder was 15wt.%, with intent to optimize the powdering process for the minute powder of which diameter is less than 5μ m. Particle size and grain distribution of Ag powder and SnO2 powder by powder metallurgy were measured by image analyzer. In order to estimate the properties of specimen tested with a variation of mixed time, the micro-hardness measurement was carried out. The Ag-SnO2-based contact material, which was produced through this study, was actually set in an electric switchgear of which working voltage is 462V and current is between 25 and 40A, for the purpose of testing its performance. As the result, it excelled the existing Ag-CdO-based contact materials in terminal-temperature ascent and main contact resistance.

LIQUID SOURCE MISTED CHEMICAL DEPOSITION PROCESS OF THREE-DIMENSIONAL NANO-FERROELECTRICS WITH SUBSTRATE HEATING

2007 ◽  
Vol 95 (1) ◽  
pp. 180-186 ◽  
Author(s):  
S. KAWASAKI ◽  
J. F. SCOTT ◽  
H. FAN ◽  
G. CATALAN ◽  
M. M. SAAD ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Chemical Deposition ◽  
Deposition Process ◽  
Substrate Heating ◽  
Liquid Source

scholarly journals ULTRASONIC ASSISTED CASTING OF ALUMINUM MATRIX COMPOSITE

2013 ◽  
pp. 246-250
Author(s):  
RAHUL GUPTA ◽  
B.S.S. DANIEL ◽  
G.P. CHAUDHARI
Keyword(s):  
Carbon Black ◽  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Aluminium Matrix Composite ◽  
Mechanical Stirring ◽  
Ultrasonic Assisted ◽  
And Control ◽  
Melting Experiments ◽  
Ultrasonic Stirring

In this study, we have investigated the effect of ultrasonic stirring in aluminium matrix composite (A359 + 20 vol % SiC ) with the reinforcement of 1 mole % of carbon black. Melting experiments were performed by employing four different conditions. These were – carbon black addition accompanied with mechanical stirring, carbon black addition accompanied with ultrasonic stirring, ultrasonic stirring but no carbon black addition and control specimen (without ultrasonic stirring and no carbon black addition). Hardness comparisons between the samples casted at different condition were made. Sample which was ultrasonically treated (UST) and carbon inoculated had higher hardness than a sample which was neither ultrasonically treated nor carbon black inoculated and the samples which was either ultrasonically treated or carbon inoculated. Microstructure study revealed that a sample which was ultrasonically treated had fine dendrite structure and more uniform distribution of SiC particles than the other samples. Porosity was observed with those samples which were not ultrasonically treated. Al4SiC4 particles were observed but Al4C3 particles weren’t observed.

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