Producing method for solid niobium capacitor

The method includes following steps: sintering; welding; forming; capsulizing; assembling; molding. The main technical character is: 1, the sinter cake is passivated by using cool pure water to reduce oxygen update rate of Niobium anode block; 2, in forming process the activate is made alternatively by using nitric acid solution and phosphoric acid solution, by this way the product in one hand gets the virtue of undercurrent due to using nitric acid solution, in other hand the product also has virtue of resistant to voltage due to using phosphoric acid solution; 3, in capsule process the cathode of niobium capacitor is made by using alternate immersion in manganous nitrate and silica gel solution.