Behavior of Thermal Decomposition of Bastnaesite with Rare Earth Nitrate Added to It
Behavior of Thermal Decomposition of Bastnaesite with Rare Earth Nitrate Added to It
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发表时间：
2004
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通讯作者：
Tu Gan-feng
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作者：
Tu Gan-feng
为寻求氟碳铈矿低温分解的途径，采用TG-DTA研究了添加5%（质量分数）稀土硝酸盐的氟碳铈矿的热分解过程，并在430 ℃下用XRD研究了不同煅烧产物的物相组成。510？℃分别。结果表明，氟碳铈矿在不加氧化剂的情况下，在430 ℃时发生部分分解;当氧化剂的质量分数为5%时，其分解完全，分解产物主要为REOF和2CeO_2·CeF_3，并伴有少量的4CeO_2·Ce_2O_3。另一方面，氟碳铈矿可以完全分解510？添加氧化剂对该体系的氧化性能无明显影响。
To seek the way to enable bastnaesite to be decomposed at lower temperature, process of thermal decomposition of bastnaesite to which 5%(mass fraction) of rare earth nitrate had been added was developed by TG-DTA, and the phase composition of different calcined products were investigated by XRD at 430?℃ and 510?℃ separately. The results showed that bastnaesite is decomposed partly with no oxidant added to it at 430?℃, while it can be decomposed completely with 5%(mass fraction) of the oxidant added to it. The products decomposed are mainly REOF and 2CeO_2·CeF_3 accompanied with a bit of 4CeO_2·Ce_2O_3. On the other hand, bastnaesite can be completely decomposed of 510?℃ on which no apparent effect can be found when adding the oxidant to it.