Influence of NaCl-CaCl2 on Decomposing REPO4 with CaO

稀土学报(英文版), 2007, 25(6): 779-782.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

2.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

3.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

4.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

5.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

6.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

基金项目: 国家自然科学基金(50574031)

Influence of NaCl-CaCl2 on Decomposing REPO4 with CaO

Sun Shuchen ^1, , Wu Zhiying ^2, , Bian Xue ^3, , Gao Bo ^4, , Wu Wenyuan ^5, , Tu Ganfeng ^6,

1.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

2.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

3.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

4.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

5.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

6.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China

Keywords： NaCl-CaCl2

The influence of NaCl-CaCl2 on thermal decomposition of REPO4 (RE: Ce, La, Nd, Th) with CaO was studied.The heat decomposing process of REPO4 was tested with TG-DTA experiments.The results showed that the decomposition temperature of REPO4 with CaO was reduced because of adding NaCl-CaCl2 mixture (NaCl:CaCl2=1:1).The influence of the addition of NaCl-CaCl2, roasting temperature and roasting time on decomposition ratio of REPO4 with CaO was studied.The results showed that the decomposition ratio of REPO4with CaO was 79% when the addition percentage of NaCl-CaCl2 was 10%, the roasting temperature was 750℃, and the roasting time was 1 h.

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