新型电解电容器阳极材料低价铌氧化物的制备

Preparation of new electrolytic capacitor anode of niobium suboxide

分别采用Mg还原Nb2O5工艺、高能球磨工艺和Nb还原Nb2O5工艺制备了低价铌氧化物。结果表明:Mg还原Nb2O5工艺反应不易控制,产物物相复杂、粒度粗、粒形简单,以其为原料制作的阳极比容低、内阻高;高能球磨工艺制备的低价铌氧化物粒度细,比容可达107mF·V/g,但由于引入了杂质,漏电流大;Nb还原Nb2O5工艺制备的低价铌氧化物具有优良的电性能,比容、损耗、漏电流(K值)分别达到69.5mF·V/g、11.25%、1.8×10-4μA/(μF·V),其电性能指标优于FTa16300电容器钽粉国家标准。

The preparation of niobium suboxide by Mg reduction procedure, high energy ball milling procedure and Nb reduction Nb_2O_5 procedure was introduced, respectively. The Mg reduction procedure is difficult to control, and the production phase is complex, with comparatively coarse particle size and simpleness granule figure. The specific capacity is smaller, and the loss is higher than that of anodes prepared by two other processes. The particle size of production of high energy ball milling procedure is fine, and its specific capacity is 107mF·V/g. Induction of impurity results in higher leak current. The electrical property of Nb suboxide of preparation by Nb reduction Nb_2O_5 procedure is eximious. The specific capacity is 69.5mF·V/g, the loss is 11.25%, leakage current (K) is 1.8×10^(-4) μA/(μF·V), and its electrical properties are better than those of the national standard of FTa16-300 tantalum powder for capacitor.