For niobium this behavior was known since the beginning of the 20th century but the technical difficulty of the material with its high melting point of 2744 ° C hinder long times the realization of niobium electrolytic capacitors .
For niobium this behavior was known since the beginning of the 20th century . 
 The high melting point of 2744 ° C hindered the development of niobium electrolytic capacitors .