|
|
|
| Effect of the temperature on the patterns and the optical properties of Nd2O3 particles obtained with Nd2(C2O4)3·10H2O by the thermal decomposition method |
| FU Xiao-ming, SUN Hu, YANG Zai-zhi |
| Department of Materials Engineering, Suqian College, Suqian 223800,China |
|
|
|
|
Abstract The thermal decomposition of Nd2(C2O4)3·10H2O in the air is based on the its TG-DTA curve. The phases, the morphologies and the optical properties of the thermal decomposition products of Nd2(C2O4)3·10H2O in the air were characterized with X-ray diffraction (XRD), scanning electron microscopes (SEM) and UV-Visible spectrophotometer (UV-Vis) respectively. The results show that there are three steps in the process of the thermal decomposition of Nd2(C2O4)3·10H2O in the air. The first step is that Nd2(C2O4)3·10H2O lose H2O and then changes into Nd2(C2O4)3 at 25-300 ℃. The second step is that Nd2(C2O4)3 is heated to decompose into Nd2O2CO3 at 300-600 ℃. The third step is that Nd2O2CO3 is heated to decompose into Nd2O3 at 600-750 ℃. Nd2O3 nanoparticles are obtained by the thermal decomposition method with Nd2(C2O4)3·10H2O is heated at 950 ℃ for 15 min. With the increasement of thermal decomposition temperature, more Nd2O3 particles are obtained and their optical absorption properties become stronger. Especially, Nd2O3 nanoparticles have many strong absorption peaks and wide absorption bands, which expand the application field of their optical properties.
|
|
Received: 18 January 2019
|
|
|
|
|
|
|
2020, Vol. 30 
