Titanium powder sintered compact

Abstract

Provided are a porous sintered compact suitable for a filter, a power feeder in a polymer electrolyte membrane type water electrolyzer, a current collector in a solid polymer fuel cell and in addition a liquid dispersion plate, especially an ink dispersion plate for an ink jet printer ink and the like. A titanium powder sintered compact made of a plate-like porous compact is obtained by sintering spherical powder made of titanium or a titanium alloy produced by means of a gas atomization method. A void ratio in the range of from 35 to 55% is realized by filling without applying a pressure and sintering without applying a pressure.

What is claimed is:  
     
         1 . A titanium powders intered compact made of a plate-like porous compact, obtained by sintering spherical gas atomized titanium powder, and having a void ratio thereof in the range of from 35 to 55%.  
     
     
         2 . The titanium powder sintered compact according to  claim 1 , fabricated by filling without applying a pressure and sintering without applying a pressure.  
     
     
         3 . The titanium powder sintered compact according to  claim 1 , wherein an average of particle diameters of said gas atomized titanium powder is in the range of from 10 to 150 μm.  
     
     
         4 . A sintered titanium filter made of said titanium powder sintered compact according to  claim 1 .  
     
     
         5 . The sintered titanium filter according  claim 4 , wherein a maximum pore diameter is in the range of from 3 to 70 μm.  
     
     
         6 . The titanium powder sintered compact according to  claim 1 , wherein a thickness of said plate-like porous compact is 500 μm or less.  
     
     
         7 . A cylindrical filter obtained by bending said titanium powder sintered compact according to  claim 6 .  
     
     
         8 . A cylindrical porous compact made of said titanium powder sintered compact according to  claim 1 , and obtained by sintering said spherical gas atomized titanium powder into a cylinder.  
     
     
         9 . The cylindrical porous compact according to  claim 8  serving as a powder sintered filter.  
     
     
         10 . A highly corrosion resistant metal filter made of said titanium powder sintered compact according to  claim 1 , wherein a cavity diameter is stepwise increased from one surface of said plate-like porous compact to the other surface thereof.  
     
     
         11 . The highly corrosion resistant metal filter according to  claim 10 , wherein said cavity diameter is in the range of from 3 to 70 μm.  
     
     
         12 . The highly corrosion resistant metal filter according to  claim 10 , wherein a void ratio is almost constant between one surface of said plate-like porous compact and the other surface and thereof.  
     
     
         13 . A porous conductive plate made of said titanium powder sintered compact according to  claim 1 , and used as a power feeder in a polymer electrolyte membrane type water electrolyzer or a current collector in a solid polymer fuel cell.  
     
     
         14 . A highly corrosion resistant porous plate made of said titanium powder sintered compact according to  claim 1 , wherein a ratio of a plate thickness T of said plate-like porous compact (in mm) to an area S (in mm 2 ) thereof is 1/10000 or less.  
     
     
         15 . The highly corrosion resistant porous plate according to  claim 14 , wherein a variation in a void ratio in a surface of said plate-like porous compact is 3% or less in standard deviation.  
     
     
         16 . A dispersion plate using said highly corrosion resistant porous plate according to  claim 14.