中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2013年
10期
3104-3111
,共8页
王世栋%李权%叶秀深%孙庆国%吴志坚
王世棟%李權%葉秀深%孫慶國%吳誌堅
왕세동%리권%협수심%손경국%오지견
Mg-La合金%熔盐%电解%氧化物%氟化物%电流效率
Mg-La閤金%鎔鹽%電解%氧化物%氟化物%電流效率
Mg-La합금%용염%전해%양화물%불화물%전류효솔
Mg-La alloy%molten salt%electrolysis%oxide%fluoride%current efficiency
以石墨坩埚为阳极，钨棒为阴极，在750°C的MgCl2?LaCl3?KCl熔盐体系中，采用恒电位电解制备Mg?La合金。研究氧化物和氟化物的加入对电解的影响，通过 XRD 对部分 Mg?La 合金产物和电解渣进行表征。随着MgO或La2O3在熔盐电解质中加入量的增加，电流效率和所得合金产物的质量都减小，表明MgO和La2O3参与电解质中的反应。在加入的氧化物质量相同的情况下，MgO与La2O3相比对电流效率和合金产物质量的影响更明显。XRD研究结果表明：MgO或La2O3加入到熔盐电解质中后，有LaOCl生成，LaOCl电解渣的生成是氧化物对电解消极影响的主要原因。在本实验的的熔盐体系中，CaF2的加入对消除MgO的负面影响没有积极意义，这可能和镧化合物在熔盐电解质中的复杂反应有关。
以石墨坩堝為暘極，鎢棒為陰極，在750°C的MgCl2?LaCl3?KCl鎔鹽體繫中，採用恆電位電解製備Mg?La閤金。研究氧化物和氟化物的加入對電解的影響，通過 XRD 對部分 Mg?La 閤金產物和電解渣進行錶徵。隨著MgO或La2O3在鎔鹽電解質中加入量的增加，電流效率和所得閤金產物的質量都減小，錶明MgO和La2O3參與電解質中的反應。在加入的氧化物質量相同的情況下，MgO與La2O3相比對電流效率和閤金產物質量的影響更明顯。XRD研究結果錶明：MgO或La2O3加入到鎔鹽電解質中後，有LaOCl生成，LaOCl電解渣的生成是氧化物對電解消極影響的主要原因。在本實驗的的鎔鹽體繫中，CaF2的加入對消除MgO的負麵影響沒有積極意義，這可能和鑭化閤物在鎔鹽電解質中的複雜反應有關。
이석묵감과위양겁，오봉위음겁，재750°C적MgCl2?LaCl3?KCl용염체계중，채용항전위전해제비Mg?La합금。연구양화물화불화물적가입대전해적영향，통과 XRD 대부분 Mg?La 합금산물화전해사진행표정。수착MgO혹La2O3재용염전해질중가입량적증가，전류효솔화소득합금산물적질량도감소，표명MgO화La2O3삼여전해질중적반응。재가입적양화물질량상동적정황하，MgO여La2O3상비대전류효솔화합금산물질량적영향경명현。XRD연구결과표명：MgO혹La2O3가입도용염전해질중후，유LaOCl생성，LaOCl전해사적생성시양화물대전해소겁영향적주요원인。재본실험적적용염체계중，CaF2적가입대소제MgO적부면영향몰유적겁의의，저가능화란화합물재용염전해질중적복잡반응유관。
Mg?La alloys were prepared by constant voltage electrolysis in the molten salt system of MgCl2?LaCl3?KCl at 750 °C, with a graphite crucible as the anode and a tungsten rod as the cathode. The effect of oxide and fluoride addition on the electrolysis was investigated comprehensively. X-ray diffraction (XRD) was used to characterize some of the Mg?La alloy products and the sludges. As the content of MgO or La2O3 in the electrolyte increased, both the current efficiency and the mass of alloy product decreased, indicating that both MgO and La2O3 may take part in the reactions in the electrolyte. When the same mass of the oxide was added, compared with La2O3, MgO had a more pronounced effect on both the current efficiency and the mass of alloy product. XRD studies confirmed the formation of LaOCl when MgO or La2O3 was added into the electrolyte. The formation of LaOCl sludge would be the main reason for the negative effect of the oxide addition on both the current efficiency and the mass of alloy. In the electrolytic system, the addition of CaF2 was not helpful to suppress the negative effect of MgO on the electrolysis, probably due to the complex reactions of the La compounds in the electrolyte.
