The effects of metal oxide additions or dopants on the electrical performance of AgSnO/sub 2/ contact materials

Jeannot, D.; Pinard, J.; Ramoni, P.; Jost, Elliott

doi:10.1109/holm.1993.489660

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Also, it is well known that the addition of 0.5 wt. % WO 3 , respectively CuO improves the wettability in the Ag-SnO 2 melting system and the contact resistance, decreasing the overtemperature and the sticking tendencies [8]. It was confirmed by the good behaviour during the life time tests of our electrical contact pieces doped with WO 3 and CuO.…”

supporting

confidence: 72%

Some Considerations Concerning the Obtaining of Some Ag-SnO<sub>2</sub> Sintered Electrical Contacts for Low Voltage Power Engineering Switching Devices

Lungu

Gavriliu

Pătroi

et al. 2007

AMR

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The paper presents some considerations concerning the obtaining and characterisation of some new electrical contact pieces of Ag-SnO2-MeO type, where the MeO is an additive chose from the series of metallic oxides WO3, Bi2O3 and CuO. These have a SnO2 content of 9.5 wt. %, a MeO content of 0.5 wt. %, the balance being Ag. The electrical contact materials were manufactured by powder metallurgy techniques using a new type of powder mixtures obtained from SnO2 and MeO powders which were wet mixed, simultaneously with “in situ” Ag synthesis. These present a very uniform and fine dispersion, which in turn leads to improved functional characteristics of the final electrical contact pieces in comparison to the dry mechanical powders mixtures. The new products were designed for low voltage power engineering switching devices working in air at In = 40, 125 and 200 A.

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supporting

confidence: 72%

Some Considerations Concerning the Obtaining of Some Ag-SnO<sub>2</sub> Sintered Electrical Contacts for Low Voltage Power Engineering Switching Devices

Lungu

Gavriliu

Pătroi

et al. 2007

AMR

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“…Doping agent are used 1521-3331/00$10.00 © 2000 IEEE to obtain closer control over the structure of the material, by improving the wettability between the molten silver and the tin oxide in the pool zone under arc, so as to avoid segregation of these two elements. The properties and interactions of the different additives are described under [8] and [9]. The performance of AgSnO is improved by the addition of bismuth oxide Bi O [2], [4], [6], [7]; this not only improves the wettability between the molten silver and the tin oxide, it also reacts with SnO under the heat generated by the arc, to form mixed oxides by the liberation of oxygen.…”

Section: B Contact Materialsmentioning

confidence: 99%

Contacts materials performances under break arc in automotive applications

Morin

Jemaa

Jeannot³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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New materials for electrical contacts have been developed recently, based on AgFeOx, AgFeRe, AgZnO, and doped AgSnO 2 . The work described here aims at evaluating the material transfer characteristics, and the contact resistance behavior, of these materials under break arc in automotive applications (14 V dc, 30-40 A). A comparison is made between these new materials and four reference materials: Ag, AgCdO, AgSnO 2 , and AgNi.Four of the new materials appear very promising: AgZnO, AgFeOx, doped AgSnO 2 io 6, and EMB8. These combine the good transfer performance of AgCdO in inductive load, i.e., in long cathodic arc, with that of AgSnO 2 in resistive load, i.e., in short anodic arc. For all materials, contact resistance is much higher in inductive load (7 m) than in resistive load (1 m). An explanation of the different behaviors of these materials is attempted by means of metallographic analysis.

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“…Estão entre os dopantes mais comumente usados: óxido de índio (In 2 O 3 ), óxido de cobre (Cu 2 O), óxido de rutênio (RuO 2 ), óxido de bismuto (Bi 2 O 3 ), óxido de molibdênio (MoO 3 ) e óxido de tungstênio (WO 3 ) (9,10,(13)(14)(15)(16)(17)(18) . Além de outros como: óxido de zinco (ZnO), óxido de tântalo (Ta 2 O 5 ), óxido de mercúrio (HgO), óxido de antimônio (Sb 2 0 3 ), óxido de telúrio (TeO 2 ) e carbeto de tântalo (TaC) (19,20) . Estes agentes dopantes possibilitam uma melhora nas propriedades elétricas para este tipo de contato elétrico no que diz respeito à redução da resistividade, evitando a formação de uma fina camada de óxido de estanho na superfície de contato, e promovendo benefícios no processo de sinterização e na molhabilidade da superfície do óxido de estanho pela prata fundida (9,(13)(14)(15)(16)(17)(18) .…”

Section: Methodsunclassified

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

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The effects of metal oxide additions or dopants on the electrical performance of AgSnO/sub 2/ contact materials

Cited by 9 publications

References 4 publications

Some Considerations Concerning the Obtaining of Some Ag-SnO<sub>2</sub> Sintered Electrical Contacts for Low Voltage Power Engineering Switching Devices

Some Considerations Concerning the Obtaining of Some Ag-SnO<sub>2</sub> Sintered Electrical Contacts for Low Voltage Power Engineering Switching Devices

Contacts materials performances under break arc in automotive applications

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

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