Heat pipe

Abstract

A heat pipe includes a hollow envelope, a wick bonded to an inner wall of the envelope, and a working fluid contained in a chamber inside the envelope. The wick is formed of sintering a plurality of first particles, which are made from copper, and a plurality of second particles, which are made from a material selected from the group consisting of silver, bismuth, indium, tin, and alloys thereof, together.

1 . A heat pipe comprising: 
 a hollow envelope having an inside wall and a chamber;    a wick containing a plurality of first particles and a plurality of second particles sintered together, said wick being provided at the inside wall of said envelope;    wherein said first particles are substantially made from copper and said second particles are made from a material selected from the group consisting of silver, bismuth, indium, tin, and alloys thereof; and    a working fluid contained in the chamber of said envelope.    
   
   
       2 . The heat pipe as claimed in  claim 1 , wherein said second particles have a particle size ranging from 0.01 μm to 15 μm.  
   
   
       3 . The heat pipe as claimed in  claim 1 , further comprising an intermediate layer arranged between the inside wall of said envelope and said wick, said intermediate layer being made from a material selected from the group consisting of silver, bismuth, indium, tin, and alloys thereof.  
   
   
       4 . The heat pipe as claimed in  claim 1 , wherein said wick has a tubular shape; the heat pipe further comprises a netting provided at an inner side of said wick.  
   
   
       5 . The heat pipe as claimed in  claim 4 , wherein said netting has a mesh size ranging from 100 meshes to 325 meshes.  
   
   
       6 . The heat pipe as claimed in  claim 4 , wherein said netting is made from copper-silver-phosphorus alloy.  
   
   
       7 . The heat pipe as claimed in  claim 4 , wherein said netting is coated with a layer of coating made from a material selected from the group consisting of bismuth, indium, tin, and alloys thereof.  
   
   
       8 . The heat pipe as claimed in  claim 1 , wherein said envelope is made from a material selected from the group consisting of copper and copper-silver alloy.