Development of silver zinc oxide for general-purpose relays

Schoepf, T.J.; Behrens, V.; Honig, Thomas; Kraus, A.

doi:10.1109/tcapt.2002.807999

Cited by 14 publications

(14 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[12][13][14] Guzmán 7 has pointed out that Ag/ZnO electrical contact materials have aroused interest in the technical field as a replacement for the Ag/CdO, because the physical and chemical properties of Zn are similar to those of Cd. Results of many other investigations [15][16][17][18] on the switching behavior also show that there is evidence that Ag/ZnO is superior to other silver metal oxides at the investigated resistive load. Furthermore, Doublet 13 reported that Ag/ZnO has an contrasting behavior, as it is the most sensitive material for welding at high currents, followed by pure silver, but its welding force is weaker than silver.…”

Section: Introductionsupporting

confidence: 65%

Effect of preparing method of ZnO powders on electrical arc erosion behavior of Ag/ZnO electrical contact material

Wei

Zhang

et al. 2016

J. Mater. Res.

View full text Add to dashboard Cite

Two kinds of Ag/ZnO electrical contact materials were fabricated by powder metallurgy method. The electrical life testing was done to investigate the arc erosion behavior of the prepared contact materials. Their properties and morphologies were characterized and discussed in detail. Results showed that Ag/ZnO (c) with coprecipitated ZnO as the second phase had better mechanical and electrical properties compared with Ag/ZnO (a) with ZnO purchased from Aladdin Industrial, Inc. Besides, some typical morphologies, such as holes, Ag or ZnO enrichment zone, Ag skeletons and bubbling area, occurred on the surface of the contacts. Especially for Ag/ZnO (c) , vertically aligned ZnO nanorod arrays were detected after the life testing without any other supporting equipment. The existence of a solid solution Zn 1Àx Ag x O and different energy generated during arcing process were possible reasons resulting in this phenomenon. A solid-vapor-solid mechanism was put forward to analyze the phenomenon mentioned above. These evidences could also offer some valuable information desired for reducing the splashing of Ag droplet under arcing.

show abstract

Section: Introductionsupporting

confidence: 65%

Effect of preparing method of ZnO powders on electrical arc erosion behavior of Ag/ZnO electrical contact material

Wei

Zhang

et al. 2016

J. Mater. Res.

View full text Add to dashboard Cite

show abstract

“…The final properties of contacts and contact materials depend mostly on their microstructure, especially on the degree of oxide phase dispersion. Decrease of the size of particles of oxide phase improves erosive properties of the material in the same way as the decrease of porosity [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Chemical Composition and Production Process Parameters on the Structure and Properties of Silver Based Composites With ZnO / Ocena Wpływu Składu Chemicznego Oraz Parametrów Wytwarzania Na Strukturę I Właściwości Kompozytów Na Osnowie Srebra Z Udziałem ZnO

Juszczyk¹,

Kulasa²,

Gubernat³

et al. 2012

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

The paper shows results of the study into influence of chemical composition and consolidation process conditions on changes of physical and electrical properties of silver-based composites used in production of electric contacts. The investigations addressed influence of content of zinc oxide (ZnO) and modifying additions in a form of silver tungstate (Ag 2 WO 4 ) and silver molybdate (Ag 2 MoO 4 ) on changes in density, porosity and electrical conductivity. Density of the produced compacts was established by geometric method. The results of density measurements were used in determination of total porosity of sinters. Also arc erosion was examined to determine applicability of the produced composites for production of electric contacts. The erosion was measured as mass loss of individual materials after specific number of connections. The studies were conducted at current intensity of 10 A and voltage of 500V. The scope of the studies covered also evaluation of kinetics of sintering of the examined composites and determination of the mechanisms of mass transport in the process. Studies into kinetics of sintering were conducted in the air atmosphere at constant temperature of 900• C. Production of the examined composite materials consisted of mechanical synthesis of powders of silver, zinc oxide and silver tungstate and molybdate, and then their consolidation by two-sided pressing and subsequent sintering. In cold pressing various pressures were applied 200, 300 and 400 MPa. Sintering was performed with a partial participation of liquid phase in temperature of 900• C. Also additional two-sided pressing was applied under pressure of 500 MPa and stress-relieving recrystallization annealing was performed as the final operation.Keywords: Contact materials, compaction, sintering, physical properties, arc erosion W pracy przedstawiono wyniki badań wpływu składu chemicznego oraz parametrów procesu konsolidacji na zmiany właściwości fizycznych oraz elektrycznych materiałów kompozytowych na osnowie srebra przeznaczonych na styki elektryczne. Analizie poddano wpływ zawartości tlenku cynku (ZnO) oraz dodatków modyfikujących w postaci wolframianu srebra (Ag 2 WO 4 ) oraz molibdenianu srebra (Ag 2 MoO 4 ) na zmiany gęstości, porowatości oraz przewodności elektrycznej. Gęstość uzyskanych wyprasek wyznaczono metodą geometryczną. Na podstawie uzyskanych wyników gęstości wyznaczono porowatość całkowitą spieków. Wykonano również badania erozji łukowej jako parametru określającego przydatność wytworzonych materiałów kompozytowych do zastosowania na styki elektryczne. Miarą erozji był ubytek masy poszczególnych materiałów po określonej liczbie łączeń. Badania zostały przeprowadzone przy natężeniu 10 A i napięciu 500 V. W ramach badań dokonano również oceny kinetyki spiekania badanych materiałów kompozytowych oraz podjęto próbę określenia mechanizmów transportu masy jakie występują podczas tego procesu. Badania kinetyki spiekania prowadzono w atmosferze powietrza w stałej temperaturze wynoszącej 900• C. Proces wytwarzania badanych ma...

show abstract

“…A liga final pode ser fundida, solidificada e posteriormente passar por um processo de oxidação interna em forno com atmosfera oxidante controlada para formar os óxidos de cádmio ou magnésio, na liga já solidificada. A prata-óxido de cádmio (AgCdO) e a prata-níquel (AgNi) estão entre os contatos elétricos mais difundidos e utilizados para médias e altas tensões (9) .…”

Section: Methodsunclassified

“…Por esse motivo, normalmente se utiliza um par de contatos elétricos dissimilares: prata-níquel / prata-grafite (3,7) . que causa danos irreparáveis à saúde, especialmente aos rins (3,7,(9)(10)(11) . (12) .…”

Section: Methodsunclassified

See 1 more Smart Citation

Estudo da brasabilidade de contatos elétricos por metal de adição 40%Ag-21%Zn-20%Cd-19%Cu.

Capeletti¹

View full text Add to dashboard Cite

show abstract

Development of silver zinc oxide for general-purpose relays

Cited by 14 publications

References 3 publications

Effect of preparing method of ZnO powders on electrical arc erosion behavior of Ag/ZnO electrical contact material

Effect of preparing method of ZnO powders on electrical arc erosion behavior of Ag/ZnO electrical contact material

Influence of Chemical Composition and Production Process Parameters on the Structure and Properties of Silver Based Composites With ZnO / Ocena Wpływu Składu Chemicznego Oraz Parametrów Wytwarzania Na Strukturę I Właściwości Kompozytów Na Osnowie Srebra Z Udziałem ZnO

Estudo da brasabilidade de contatos elétricos por metal de adição 40%Ag-21%Zn-20%Cd-19%Cu.

Contact Info

Product

Resources

About