| http://www.w3.org/ns/prov#value | - In this case, the pore diameter peak top is preferably present in the range of 0.01 to 500 ??m, more preferably from 0.03 to 300 ??m, still more preferably from 0.1 to 200 ??m, particularly preferably from 0.1 to 30 ??m and most preferably from 0.2 to 3 ??m. [0121] The niobium powder to produce the niobium sintered body in above has a two or more peak tops in the particle size distribution.
|
