Silver alloy material and method for manufacturing the silver alloy material

Abstract

The present invention provides a silver alloy material and a method for manufacturing the silver alloy material, the silver alloy material comprising essentially by weight of about 65% to 95% Ag, about 5% to 35% In. The silver alloy material has a solid-liquid coexistence zone. The steps for manufacturing the silver alloy material include mixing, heating in vacuum status, cooling and annealing. The characters of the silver alloy are low yield tensile strength (58 Mpa), high ultimate tensile strength (300 MPa) and high elongation (60%) and anti-tarnishing property. The silver alloy material could be used for optics reflector mirror, silver ornament, brazing materials and very fine silver alloy wire for semiconductor bounding application.

What is claimed is: 
     
         1 . A silver alloy material, a total weight of the silver alloy material as a basis, which is characterized in: by weight of 65% to 95% silver and 5% to 35% indium, wherein the silver alloy material has a solid-liquid coexistence zone. 
     
     
         2 . The silver alloy material of  claim 1 , wherein indium is included by weight of 5% to 25%. 
     
     
         3 . The silver alloy material of  claim 1 , wherein the silver alloy material is applied to optics reflector mirror. 
     
     
         4 . The silver alloy material of  claim 1 , wherein the silver alloy material is applied to brazing material. 
     
     
         5 . The silver alloy material of  claim 1 , wherein the silver alloy material is applied to silver ornaments. 
     
     
         6 . The silver alloy material of  claim 1 , wherein the silver alloy material is made as a wire in diameter of 8 mm to 16 um. 
     
     
         7 . The silver alloy material of  claim 1 , wherein the metal elongation of the silver alloy material is 60%. 
     
     
         8 . The silver alloy material of  claim 1 , wherein the yield tensile strength of the silver alloy material is 58 MPa. 
     
     
         9 . The silver alloy material of  claim 1 , wherein the ultimate tensile strength of the silver alloy material is 300 MPa. 
     
     
         10 . A method for manufacturing a silver alloy material, comprising:
 (a) providing silver particles and indium particles;   (b) mixing the silver particles and the indium particles to form a silver-indium mixture;   (c) vacuum heating the silver-indium mixture to enable the silver-indium mixture be homogenous in melting phase;   (d) cooling the silver-indium mixture to form a primary silver-indium alloy, wherein the primary silver-indium alloy is a solid solution of silver-indium solid-liquid coexistence; and   (e) annealing the primary silver-indium alloy to form the silver alloy material, wherein the silver alloy material has a solid-liquid coexistence zone.   
     
     
         11 . The method for manufacturing a silver alloy material of  claim 10 , wherein in the step (a), the total weight of the silver particles and the indium particles is a basis by weight of 65% to 95% silver and 5% to 35% indium. 
     
     
         12 . The method for manufacturing a silver alloy material of  claim 11 , wherein in the step (a), the weight percentage of the indium particle is further 5% to 25%. 
     
     
         13 . The method for manufacturing a silver alloy material of  claim 10 , wherein in the step (c), the silver particles and the indium particles are put into a pot and heated in temperature of 1000° C. to 1030° C. 
     
     
         14 . The method for manufacturing a silver alloy material of  claim 10 , wherein in the step (d), the silver-indium mixture is put into a vacuum apparatus for cooling. 
     
     
         15 . The method for manufacturing a silver alloy material of  claim 10 , wherein in the step (e), the primary silver-indium alloy is put into a vacuum apparatus for annealing.