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四氯化鈦熔鹽電解基礎研究之一——不含鈦的某些熔鹽體系電化學性質的研究

  • 摘要: 本文用伏安曲線外推和極化電動勢法(斷電法和示波器法)對TiCl4電解試驗中采用的三個熔鹽體系NaCl-KCl,NaCl-CaCl2,NaCl-KCl-SrCl2進行了電化學研究。三個體系中鈉析出的反電勢大致相同,但NaCl-KCl系對鈦離子的溶解和傳質能力較好、粘度較小,有利于提高鈦離子濃度,減少鈉的析出,提高電效。這三個體系中工業級鹽的鈉析出反電勢比化學純鹽的低,而析鈉前的陰極電流密度比化學純的鹽高,不利于提高電效和質量,因此鹽的預處理化學凈化或預電解尤為必要。
    本文的研究在國內首次用單相全波整流—示波器法測量反電勢。此方法不需中斷電解而又無歐姆壓降的影響,適宜于對實驗室小型電解的監控和研究。

     

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