在CaCl2熔盐中,利用固体氧离子膜(SOM)法电解还原Ta2O5直接制备金属钽.研究了成形压力与烧结温度对阴极形貌及孔隙率的影响,进而获得阴极微结构对产物形貌及氧含量的影响规律.结果表明:阴极片的颗粒尺寸和孔隙率大小是影响电解还原的重要因素;Ta2O5片的孔隙率随着成形压力的增大、烧结温度的升高明显降低；孔隙率大,有利于电解还原的进行,产物颗粒尺寸大;孔隙率小,会导致阴极产物形成致密的金属外层;在成形压力为4 MPa经1150℃烧结2h或6 MPa经1100℃烧结2h条件下,阴极反应活性良好,电解产物氧含量低.
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