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This paper studies the characteristics and the method of preparation of superfine powder of niobium / niobium oxide , selected wet chemical Preparation of Ultrafine powder method . Uniform the ceramic capacitor grade ( ultra - fine powder with an average particle size of 0.1 - 0.2um ) NB205 powder prepared by precipitation optimum conditions , the effects of temperature , precipitation final pH value , concentration of reactants and dehydration agents, additives on the formation of Nb ( OH ) 5 powder particle size distribution and particle size , and the sintering temperature and time the Nb 2 < / sub > O 5 powder particle size . TG-DTA, TEM, SEM, XRD, tester specific surface area ( BET ) and CILAS determination of particle size tester : When H 2 NbOF 5 concentration of 0.2-0.4 when M to NH 3 < / sub > H 2 < / sub > 0 for precipitating agent , as a dehydrating agent such as ethanol , acetone , obtained precipitate was dried at 80-100 ℃ , prepared Nb (OH) 5 particle size uniform and narrow distribution of its average particle diameter in 0.07Lμm re- in 670 ℃ ignition , may be prepared have a particle size distribution is narrow , aggregates less than a surface area of ??14.44 m 2 / g, average particle diameter of 0.1μm, and the purity of GT ; 99.95 % of the ceramic capacitor grade Nb 2 O 5 soot body . The method is simple equipment , short process, pollution , preparation of high purity products , good quality .
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