Oxide-Dispersion Strengthened Platinum Material

Abstract

The present invention provides an oxide-dispersion-strengthened platinum material in which dispersed particles made from a metallic oxide of an additive metal are dispersed in a matrix made from platinum or a platinum alloy, characterized in that the concentration of oxygen in the material except oxygen bound to the additive metal is 100 ppm or lower. The platinum material according to the present invention has preferably an average diameter of the dispersed particles of 0.2 μm or smaller, and an average interparticle distance of 0.01 to 2.7 μm. The platinum material also preferably has the concentration of the dispersed particles in an amount of 0.01 to 0.5 wt %, and an oxidation rate of the additive metal of 50 to 100%.

1 . An oxide-dispersion-strengthened platinum material which comprises dispersed particles made from a metallic oxide of an additive metal are dispersed in a matrix made from platinum or a platinum alloy, wherein a concentration of oxygen in the material except oxygen bound to the additive metal is 100 ppm or lower. 
   
   
       2 . The oxide-dispersion-strengthened platinum material according to  claim 1 , wherein an average diameter of the dispersed particles is 0.2 μm or smaller, an average value of distances between the particles is 0.01 to 2.7 μm, and the concentration of the dispersed particles in the matrix is 0.01 to 0.5 wt %. 
   
   
       3 . The oxide-dispersion-strengthened platinum material according to  claim 1 , wherein the oxidation rate of the additive metal is 50 to 100%. 
   
   
       4 . The oxide-dispersion-strengthened platinum material according to  claim 1 , wherein the additive metal is any of zirconium, calcium, yttrium and samarium. 
   
   
       5 . The oxide-dispersion-strengthened platinum material according to  claim 1 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       6 . The oxide-dispersion-strengthened platinum material according to  claim 2 , wherein the oxidation rate of the additive metal is 50 to 100%. 
   
   
       7 . The oxide-dispersion-strengthened platinum material according to  claim 2 , wherein the additive metal is any of zirconium, calcium, yttrium and samarium. 
   
   
       8 . The oxide-dispersion-strengthened platinum material according to  claim 3 , wherein the additive metal is any of zirconium, calcium, yttrium and samarium. 
   
   
       9 . The oxide-dispersion-strengthened platinum material according to  claim 6 , wherein the additive metal is any of zirconium, calcium, yttrium and samarium. 
   
   
       10 . The oxide-dispersion-strengthened platinum material according to  claim 2 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       11 . The oxide-dispersion-strengthened platinum material according to  claim 3 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       12 . The oxide-dispersion-strengthened platinum material according to  claim 4 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       13 . The oxide-dispersion-strengthened platinum material according to  claim 6 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       14 . The oxide-dispersion-strengthened platinum material according to  claim 7 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       15 . The oxide-dispersion-strengthened platinum material according to  claim 8 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       16 . The oxide-dispersion-strengthened platinum material according to  claim 9 , wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy. 
   
   
       17 . The oxide-dispersion-strengthened platinum material according to  claim 1  wherein an average diameter of the dispersed particles is 0.2 μm or smaller, an average value of distances between the particles is 0.01 to 2.7 μm, the concentration of the dispersed particles in the matrix is 0.01 to 0.5 wt %; wherein the oxidation rate of the additive metal is 50 to 100%; wherein the additive metal is any of zirconium, calcium, yttrium and samarium; and wherein the matrix is any of a platinum-rhodium alloy, a platinum-gold alloy, a platinum-rhodium-gold alloy and a platinum-iridium alloy.