Claims
- 1. A highly thermally conductive electrical joint compound for use in forming a compression joint within a metal tubular body connecting to at least one end of electrical power cable capable of carrying the heavy current in power distribution systems, in which the tubular body is compressed into firm contact with the cable with sufficient force to substantially reduce the diameter of the cable end, in which the joint is characterized in that the joint has an electrical conductance at least substantially equal to an equal length of cable and in that the joint is capable of maintaining high conductance and mechanical strength over a very great number of thermal recyclings, said compound comprising a thermosetting hardenable resin containing a uniformly dispersed mixture of fine and coarse metal particles, said fine particles being 200-500 mesh, said coarse particles being 10-100 mesh, the ratio by weight of coarse particles (C) to fine particles (F) being expressed by:
- C/F=1/20 to 1/1,
- the ratio by weight of all metal particles (P) to resin (R) being expressed by:
- P/R=3/2 to 6/1.
- 2. A compound as defined in claim 1, in which the resin is selected from the group consisting of epoxy, acrylic, polyester, silicone, polyurethane, polysulphite, and polyolexine resins.
- 3. A compound as defined in claim 1, in which the resin is epoxy resin.
- 4. A compound as defined in claim 1, in which the fine particles are copper.
- 5. A compound as defined in claim 1, in which the coarse particles are copper, iron, nickel, or nickel-aluminum alloy.
- 6. A compound as defined in claim 1, in which the coarse particles are 50--50 nickel-aluminum alloy.
- 7. A compound as defined in claim 1, in which the resin is epoxy, the fine particles are copper and the coarse particles are copper, iron, nickel, or nickel-aluminum alloy.
- 8. A compound as defined in claim 1, in which the resin is epoxy, the fine particles are copper and the coarse particles are nickel-aluminum alloy.
- 9. A compound as defined in claim 1, in which the coarse particles are of irregular shape and have sharp edges.
- 10. A compound as defined in claim 6, in which the coarse particles are of irregular shape and have sharp edges.
- 11. A compound as defined in claim 8, in which the coarse particles are of irregular shape and have sharp edges.
- 12. A compound as defined in claim 1, in which the conductor is essentially aluminum.
- 13. A compound as defined in claim 1, in which the hardened resin has a hardness of 105-125 Rockwell R.
CROSS REFERENCE TO RELATED APPLICATION
The present application is a division of our copending application Ser. No. 882,994 filed Mar. 3, 1978, which in turn is a continuation-in-part of our prior copending application Ser. No. 648,453, filed Jan. 12, 1976, now abandoned.
US Referenced Citations (4)
Divisions (1)
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Number |
Date |
Country |
Parent |
882994 |
Mar 1978 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
648453 |
Jan 1976 |
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