摘要
用热重法研究了BaRE(Cu0.5Fe0.5)2O5+δ(RE=Lu^Pr)样品的氧含量的变化。结果表明仅RE=Pr、Nd、Gd时样品的氧含量随温度和氧分压变化而变化,其它样品的氧含量基本不发生变化。用暂态热重法研究了氧在RE=Pr、Nd、Gd样品的表面反应速度,发现氧在表面吸附速率比脱附要快。
Oxygen contents of the samples BaRE（Cu0.5Fe0.5）2O5＋δ （RE = Pr, Nd, Gd） are studied by thermogravimetry. The results show that only the oxygen stoichiometries of BaRE（Cu0.5Fe0.5）2O5＋δ vary with the variation of temperature or oxygen pressure. The surface oxygen reaction rate constants of BaRE（Cu0.5Fe0.5）2O5＋δ are also investigated by the transient thermogravimetric analysis method. It is found that the oxygen adsorption rate is faster than desorption rate on the surface of the samples.
出处
《稀土》
EI
CAS
CSCD
北大核心
2005年第4期49-52,78,共5页
Chinese Rare Earths
