DE4024939A1 - Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact - Google Patents

Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact

Info

Publication number
DE4024939A1
DE4024939A1 DE19904024939 DE4024939A DE4024939A1 DE 4024939 A1 DE4024939 A1 DE 4024939A1 DE 19904024939 DE19904024939 DE 19904024939 DE 4024939 A DE4024939 A DE 4024939A DE 4024939 A1 DE4024939 A1 DE 4024939A1
Authority
DE
Germany
Prior art keywords
silver
contact
contacts
tin oxide
pure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19904024939
Other languages
German (de)
Inventor
Des Erfinders Beantragt Teilnichtnennung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOEHM, WOLFGANG, DR., 75175 PFORZHEIM, DE
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19904024939 priority Critical patent/DE4024939A1/en
Publication of DE4024939A1 publication Critical patent/DE4024939A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/04—Co-operating contacts of different material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material
    • H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
    • H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
    • H01H1/02376—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te containing as major component SnO2

Landscapes

  • Contacts (AREA)

Abstract

Electrical contacts made of silver and tin-oxide, and possibly other additives are used in combination with an opposing contact of Ag with 3% Cu. Also claimed is the use of pure Ag and of Ag with not more than 1% Ni as the opposing contact. USE/ADVANTAGE - The performance of the Ag/SnO2 contacts is pref. to that of the current Ag/CdO contacts. This is because of the environmental damage which can result from the use of Cd-cpds. Other advantages are that the Ag/SnO2 contacts are thermally more stable which shows in its reduced burn-off rate and longer life. The material is also easier to make and to machine.

Description

Die Erfindung bezieht sich auf einen Werkstoff für elektrische Kontakte aus Silber und Zinnoxid und gegebenenfalls weiteren Zusätzen.The invention relates to a material for electrical Silver and tin oxide contacts, and others if necessary Additives.

Für die Herstellung von elektrischen Kontaktstücken hat sich für eine Vielzahl von Anwendungsfällen Silberkadmiumoxid in früheren Zeiten bewährt. Aufgrund der Umweltbelastung durch Kadmiumoxid wird jedoch verstärkt versucht, Kadmiumoxid durch ein anderes Metalloxid zu ersetzen. Sei diesen Untersuchungen zeigt es sich, daß Silber-Zinnoxid ein geeigneter Ersatz für Kadmiumoxid ist. Aufgrund der höheren thermischen Stabilität von Zinnoxid gegenüber Kadmiumoxid ergibt sich zudem eine deut­ liche verminderte Abbrandrate, die zu längerer Lebensdauer im Schaltgerät führt. Aus wirtschaftlichen und thermischen Gründen wird bei Schützen im mittleren Strombereich (30-80 A) eine unsymmetrische Paarung der Kontaktwerkstoffe vorgezogen. Eine charakteristische Paarung ist z. B. Ag Cd O und Ag Ni 90/10.Has for the manufacture of electrical contacts for a variety of applications in silver cadmium oxide proven in earlier times. Due to environmental pollution Cadmium oxide, however, is increasingly trying to get through cadmium oxide to replace another metal oxide. Be these examinations it turns out that silver-tin oxide is a suitable replacement for Is cadmium oxide. Because of the higher thermal stability tin oxide compared to cadmium oxide also results in a noticeable difference reduced burn-up rate, which leads to a longer service life in the Switchgear leads. For economic and thermal reasons becomes a for contactors in the medium current range (30-80 A) asymmetrical pairing of the contact materials preferred. A characteristic pairing is e.g. B. Ag Cd O and Ag Ni 90/10.

Untersuchungen mit dem Alternativwerkstoff Ag Sn O2 (statt Ag Cd O) und Ag Ni 90/10 als zweitem Partner führten jedoch zu so hohen Übergangswiderständen im Schaltbetrieb, daß die Gefahr der Zerstörung des Gerätes besteht.Investigations with the alternative material Ag Sn O 2 (instead of Ag Cd O) and Ag Ni 90/10 as a second partner, however, led to such high contact resistances in switching operation that there is a risk of the device being destroyed.

Es ist daher Aufgabe der Erfindung, einen geeigneten zweiten Partner in Verbindung mit Ag Sn O2 zu finden, der kostengünsti­ ger im Werkstoff und Verarbeitung ist.It is therefore an object of the invention to find a suitable second partner in connection with Ag Sn O 2 , which is inexpensive in material and processing.

Dies wird auf einfache Weise dadurch erreicht, daß eine Misch­ paarung aus Ag Sn O2 und einem zweiten Partner aus Ag Cu3 verwendet wird. Eine weitere Lösung der vorstehenden Aufgabe besteht darin, daß eine Mischpaarung aus einem ersten Kontakt­ stück aus Ag Sn O2 (Silber-Zinnoxid) und einem zweiten Kontakt­ stück aus Ag 1000 (Reinsilber) vorgesehen ist oder daß eine Mischpaarung aus einem ersten Kontaktstück aus Ag Sn O2 (Silber- Zinnoxid) und einem zweiten Kontaktstück aus Ag Ni (Silber mit einem Nickelzusatz 1%) vorgesehen ist.This is easily achieved by using a mixed pair of Ag Sn O 2 and a second partner made of Ag Cu3. Another solution to the above problem is that a mixed pair of a first contact piece of Ag Sn O 2 (silver-tin oxide) and a second contact piece of Ag 100 0 (pure silver) is provided or that a mixed pair of a first contact piece Ag Sn O 2 (silver-tin oxide) and a second contact piece made of Ag Ni (silver with a nickel addition 1%) is provided.

Die bei reinem Silber bestehende Gefahr der zu geringen Isola­ tionsfestigkeit durch die Abbrandprodukte wird durch Verwen­ dung von Ag Sn O2 als erstem Partner verhindert.The risk of insufficient insulation strength due to the burn-up products in pure silver is prevented by using Ag Sn O 2 as the first partner.

Durch die erfindungsgemäße Lösung ist ein hohes Einschaltvermö­ gen, eine hohe elektrische Lebensdauer und ein geringer Über­ gangswiderstand im Schaltbetrieb erreichbar.A high switch-on capacity is achieved by the solution according to the invention gene, a long electrical life and a low over Contact resistance can be achieved in switching operation.

Claims (3)

1. Werkstoff für elektrische Kontakte aus Silber und Zinnoxid und gegebenenfalls weiteren Zusätzen, dadurch ge­ kennzeichnet, daß eine Mischpaarung aus einem ersten Kontaktstück aus Ag Sn O2 (Silber-Zinnoxid) und einem zweiten Kontaktstück aus Ag Cu3 (Silber-Kupfer, (3% Cu)) vorgesehen ist.1. Material for electrical contacts made of silver and tin oxide and possibly other additives, characterized in that a mixed pair of a first contact piece made of Ag Sn O 2 (silver-tin oxide) and a second contact piece made of Ag Cu3 (silver-copper, (3rd % Cu)) is provided. 2. Werkstoff für elektrische Kontakte aus Silber und Zinnoxid und gegebenenfalls weiteren Zusätzen, dadurch ge­ kennzeichnet, daß eine Mischpaarung aus einem ersten Kontaktstück aus Ag Sn O2 (Silber-Zinnoxid) und einem zweiten Kontaktstück aus Ag 1000 (Reinsilber) vorgesehen ist.2. Material for electrical contacts made of silver and tin oxide and possibly other additives, characterized in that a mixed pair of a first contact piece made of Ag Sn O 2 (silver-tin oxide) and a second contact piece made of Ag 100 0 (pure silver) is provided. 3. Werkstoff für elektrische Kontakte aus Silber und Zinnoxid und gegebenenfalls weiteren Zusätzen, dadurch ge­ kennzeichnet, daß eine Mischpaarung aus einem ersten Kontaktstück aus Ag Sn O2 (Silber-Zinnoxid) und einem zweiten Kontaktstück aus Ag Ni (Silber mit einem Nickelzusatz 1%) vorgesehen ist.3. Material for electrical contacts made of silver and tin oxide and possibly other additives, characterized in that a mixed pair of a first contact piece made of Ag Sn O 2 (silver-tin oxide) and a second contact piece made of Ag Ni (silver with a nickel additive of 1%) ) is provided.
DE19904024939 1990-08-06 1990-08-06 Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact Withdrawn DE4024939A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904024939 DE4024939A1 (en) 1990-08-06 1990-08-06 Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904024939 DE4024939A1 (en) 1990-08-06 1990-08-06 Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact

Publications (1)

Publication Number Publication Date
DE4024939A1 true DE4024939A1 (en) 1992-02-20

Family

ID=6411742

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904024939 Withdrawn DE4024939A1 (en) 1990-08-06 1990-08-06 Contact material compsn. for use in electrical switches - consisting of silver tin oxide for one of contacts and pure silver silver with low nickel or with copper contact for other contact

Country Status (1)

Country Link
DE (1) DE4024939A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482525A2 (en) * 2003-05-26 2004-12-01 Omron Corporation Contact construction for DC loads and switching device having the contact construction
EP1868219A1 (en) * 2006-06-14 2007-12-19 Abb Research Ltd. A contactor
RU2820332C1 (en) * 2022-12-28 2024-06-03 Акционерное Общество "Инновационный Научно-Технический Центр" (Ао "Интц") Method of making contacts for electromechanical relay, contact made in this way, and electromechanical relay

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2324627A1 (en) * 1972-06-02 1973-12-20 Villamos Ipari Kutato Intezet Multi component electric switch - with reduced spark erosion
DE2437021A1 (en) * 1974-08-01 1976-02-19 Westfaelische Metall Industrie DC SWITCHING DEVICE, IN PARTICULAR HOT WIRE FLASHERS FOR MOTOR VEHICLES
DE2952128C2 (en) * 1979-12-22 1984-10-11 Degussa Ag, 6000 Frankfurt Process for the pretreatment of the powder for sintered and extruded semifinished products made of silver-tin oxide for electrical contacts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2324627A1 (en) * 1972-06-02 1973-12-20 Villamos Ipari Kutato Intezet Multi component electric switch - with reduced spark erosion
DE2437021A1 (en) * 1974-08-01 1976-02-19 Westfaelische Metall Industrie DC SWITCHING DEVICE, IN PARTICULAR HOT WIRE FLASHERS FOR MOTOR VEHICLES
DE2952128C2 (en) * 1979-12-22 1984-10-11 Degussa Ag, 6000 Frankfurt Process for the pretreatment of the powder for sintered and extruded semifinished products made of silver-tin oxide for electrical contacts

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE-Buch: KEIL, Albert: Werkstoffe für elektrische Kontakte.Springer-Verlag, Berlin, Göttingen, Heidelberg, 1960, S.145-151 *
DE-Buch: STÖCKEL, Dieter: Werkstoffe für elektri- sche Kontakte. Kontakt & Studium Bd.43, expert verlag 7031 Grafenau 1/Württ., S.72-74 u. 83-86 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482525A2 (en) * 2003-05-26 2004-12-01 Omron Corporation Contact construction for DC loads and switching device having the contact construction
US7012492B2 (en) * 2003-05-26 2006-03-14 Omron Corporation Contact construction for DC loads and switching device having the contact construction
EP1482525A3 (en) * 2003-05-26 2006-06-21 Omron Corporation Contact construction for DC loads and switching device having the contact construction
EP1868219A1 (en) * 2006-06-14 2007-12-19 Abb Research Ltd. A contactor
RU2820332C1 (en) * 2022-12-28 2024-06-03 Акционерное Общество "Инновационный Научно-Технический Центр" (Ао "Интц") Method of making contacts for electromechanical relay, contact made in this way, and electromechanical relay

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: BOEHM, WOLFGANG, DR., 75175 PFORZHEIM, DE

8139 Disposal/non-payment of the annual fee