Magnetically shielded conductor

Abstract

A magnetically shielded conductor assembly containing a conductor disposed within an insulating matrix, and nanomagnetic material and nanoelectrical material disposed around the conductor. The conductor has a resistivity at 20 degrees Centigrade of from about 1 to about 100 microohm-centimeters. The insulating matrix is composed of nano-sized particles having a maximum dimension of from about 10 to about 100 nanometers. The insulating matrix has a resistivity of from about 1×10 9 to about 1×10 13 ohm-centimeter. The nanomagnetic material has an average particle size of less than about 100 nanometers. The nanomagnetic material has a saturation magnetization of from about 200 to about 26,000 Gauss. The magnetically shielded conductor assembly is flexible, having a bend radius of less than 2 centimeters.

1 . A magnetically shielded conductor assembly comprised of a 
 a. conductor wherein said conductor has a resistivity of from about 1 to about 100 microohm-centimeters;    b. an insulation shield disposed around said conductor wherein said insulation shield is comprised of an insulating material and electrically insulating particles wherein 
 1. at least about 90 weight percent of said electrically insulating particles have a maximum dimension of less than about 100 nanometers;  
 2. said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 2,000 Gauss; and  
 3. said insulation shield has a resistivity of from about 1×10 9  to about 1×10 13  ohm-centimeter.  
   
     
     
         2 . The magnetically shielded conductor assembly as recited in  claim 1 , wherein said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 10,000 Gauss.  
     
     
         3 . The magnetically shielded conductor assembly as recited in  claim 2 , wherein said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 26,000 Gauss.  
     
     
         4 . The magnetically shielded conductor assembly as recited in  claim 1 , further comprising an electrical shield which is comprised of electrically conductive particles wherein 
 a. at least about 90 weight percent of said electrically conductive particles have a maximum dimension of less than about 100 microns;    b. said electrical shield has a resistivity of from about 1.6 to about 100 microohm-centimeters; and    c. said electrical shield is not contiguous with said conductor.    
     
     
         5 . The magnetically shielded conductor assembly as recited in  claim 4 , further comprising a power source.  
     
     
         6 . The magnetically shielded conductor assembly as recited in  claim 5 , further comprising a load and a controller wherein said power source is operatively connected to said controller and said controller is operatively connected to said load.  
     
     
         7 . The magnetically shielded conductor assembly as recited in  claim 6 , wherein said controller is disposed within said insulation shield.  
     
     
         8 . The magnetically shielded conductor assembly as recited in  claim 7 , wherein said power source supplies alternating current.  
     
     
         9 . The magnetically shielded conductor assembly as recited in  claim 7 , wherein said power source supplies direct current.  
     
     
         10 . The magnetically shielded conductor assembly as recited in  claim 7 , wherein said magnetically shielded conductor assembly is operatively configured to be implanted within a biological organism.  
     
     
         11 . The magnetically shielded conductor assembly as recited in  claim 10 , wherein said load is selected from the group consisting of a pacemaker, an artificial heart, a heart-massaging device, and a defibrillator.  
     
     
         12 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said insulating material is selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, yttrium-stabilized zirconia, silica carbide, silicon nitride, aluminum nitride, and combinations thereof.  
     
     
         13 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said at least about 90 weight percent of said electrically insulating particles and said electrically conductive particles have a maximum dimension of from about 2 to about 50 nanometers.  
     
     
         14 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said conductor consists essentially of a conductive material selected from the group consisting of silver, copper, aluminum, alloys thereof, and mixtures thereof.  
     
     
         15 . The magnetically shielded conductor assembly as recited in  claim 4 , further comprising a second conductor wherein said second conductor has a resistivity of from about 1 to about 100 microohm-centimeters and wherein said insulation shield disposed around said second conductor.  
     
     
         16 . The magnetically shielded conductor assembly as recited in  claim 15 , wherein said conductor and said second conductor are substantially parallel to each other.  
     
     
         17 . The magnetically shielded conductor assembly as recited in  claim 15 , further comprising an insulating matrix wherein said insulating matrix is disposed between said conductor and said second conductor.  
     
     
         18 . The magnetically shielded conductor assembly as recited in  claim 17 , wherein said insulating matrix has a resistivity of from about 1×10 9  to about 1×10 13  ohm-centimeters.  
     
     
         19 . The magnetically shielded conductor assembly as recited in  claim 18 , wherein said insulating matrix consists essentially of said insulating material.  
     
     
         20 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said electrically insulating particles are comprised of ferrites.  
     
     
         21 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said insulation shield is a layer with a thickness of less than about 5 microns.  
     
     
         22 . The magnetically shielded conductor assembly as recited in  claim 21 , wherein said insulation shield is a layer with a thickness of from about 0.1 microns to about 3 microns.  
     
     
         23 . The magnetically shielded conductor assembly as recited in  claim 22 , wherein said electrical shield is a layer with a thickness of from about 0.1 microns to about 3 microns.  
     
     
         24 . The magnetically shielded conductor assembly as recited in  claim 4 , wherein said insulating material has a thermal conductivity of less than about 200,000 calories centimeters per square centimeter degree seconds.  
     
     
         25 . The magnetically shielded conductor assembly as recited in  claim 24 , wherein said magnetically shielded conductor assembly is flexible, having a bend radius of less than 2 centimeters.  
     
     
         26 . A magnetically shielded conductor assembly comprised of a 
 a. a first conductor;    b. a second conductor wherein said first conductor and said second conductor are substantially parallel to one another;    c. an insulation shield disposed around said first conductor and said second doctor wherein said insulation shield is comprised electrically insulating particles wherein 
 1. at least about 90 weight percent of said electrically insulating particles have a maximum dimension of less than about 100 nanometers;  
 2. said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 2,000 Gauss.  
   
     
     
         27 . The magnetically shielded conductor assembly as recited in  claim 23 , wherein said insulation shield is further comprised of an insulating material.  
     
     
         28 . The magnetically shielded conductor assembly as recited in  claim 27 , wherein said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 10,000 Gauss.  
     
     
         29 . The magnetically shielded conductor assembly as recited in  claim 28 , wherein said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 26,000 Gauss.  
     
     
         30 . The magnetically shielded conductor assembly as recited in  claim 29 , wherein said electrically conductive particles are selected from the group consisting of iron, aluminum, copper silver and steel.  
     
     
         31 . The magnetically shielded conductor assembly as recited in  claim 30 , wherein at least about 90 weight percent of said electrically conductive particles have a maximum dimension of less than about 100 nanometers.  
     
     
         32 . The magnetically shielded conductor assembly as recited in  claim 31 , wherein said electrically conductive particles are comprised of iron and aluminum.  
     
     
         33 . The magnetically shielded conductor assembly as recited in  claim 32 , wherein said electrically conductive particles consist essentially of iron and aluminum.  
     
     
         34 . The magnetically shielded conductor assembly as recited in  claim 33 , wherein the molar ratio of aluminum to iron at least about 9 to 1.  
     
     
         35 . The magnetically shielded conductor assembly as recited in  claim 33 , wherein the molar ratio of aluminum to iron at least about 9.5 to 1.  
     
     
         36 . The magnetically shielded conductor assembly as recited in  claim 33 , wherein the molar ratio of aluminum to iron at least about 9.9 to 1.  
     
     
         37 . The magnetically shielded conductor assembly as recited in  claim 36 , wherein said electrically conducting particles and said electrically insulating particles are present in the same layer.  
     
     
         38 . The magnetically shielded conductor assembly as recited in  claim 36 , wherein said electrically conducting particles and said electrically insulating particles are present in two separate layers.  
     
     
         39 . The magnetically shielded conductor assembly as recited in  claim 36 , wherein said first conductor and said second conductor are contiguous with one another.  
     
     
         40 . The magnetically shielded conductor assembly as recited in  claim 36 , wherein said first conductor and said second conductor are non-contiguous with one another.  
     
     
         41 . A process for producing a magnetically shielded conductor assembly comprising the steps of 
 a. coating a first conductor and a second conductor with an insulating material thus forming a coated conductor assembly, wherein 
 i. said insulating material has a resistivity of from about 1×10 9  to about 1×10 13  ohm-centimeter;  
 ii. said first conductor and said second conductor each have a resistivity of from about 1 to about 100 microohm-centimeters;  
   b. dispose an insulating matrix between said first conductor and second conductor of said coated conductor assembly to form an insulated conductor assembly, wherein said insulating matrix has a resistivity of from about 1×10 9  to about 1×10 13  ohm-centimeter; and    c. coating said insulated conductor assembly with an insulation shield such that said insulation shield is disposed around said conductor wherein said insulation shield is comprised of said insulating material and electrically insulating particles, thus forming an electrically insulated conductor assembly, wherein 
 1. at least about 90 weight percent of said electrically insulating particles have a maximum dimension of less than about 100 nanometers;  
 2. said insulation shield has a saturation magnetization at 25 degrees Centigrade of at least about 2,000 Gauss;  
 3. said insulation shield has a resistivity of from about 1×10 9  to about 1×10 13  ohm-centimeter;  
   
     
     
         42 . The process for producing a magnetically shielded conductor assembly as recited in  claim 41 , further comprising the step of heating said insulated conductor assembly to a temperature of from about 200 degrees to about 600 degrees Centigrade for from about 1 minute to about 10 minutes so as to bond said insulating material to said first conductor and said second conductor.  
     
     
         43 . The process for producing a magnetically shielded conductor assembly as recited in  claim 42 , further comprising the step of cooling said insulated conductor assembly to a temperature of from about 30 degrees to about 100 degrees Centigrade over a period of from about 3 minutes to about 15 minutes.  
     
     
         44 . The process for producing a magnetically shielded conductor assembly as recited in  claim 43 , further comprising the step of heating said electrically insulated conductor assembly to a temperature of from about 200 degrees to about 600 degrees Centigrade for from about 1 to about 10 minutes so as to bond said electrically insulating particles to said magnetically shielded conductor assembly.