温度对草酸钕热分解为氧化钕形貌和光学特性的影响  

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

作　　者：傅小明[1] 孙虎[1] 杨在志[1] FU Xiao-ming;SUN Hu;YANG Zai-zhi(Department of Materials Engineering,Suqian College,Suqian 223800,China)

机构地区：[1]宿迁学院材料工程系,江苏宿迁223800

出　　处：《粉末冶金工业》2020年第2期61-64,共4页Powder Metallurgy Industry

基　　金：江苏省“六大人才高峰”高层次人才培养对象资助项目(2015-XCL-064);江苏省“333工程”培训对象资助项目(BRA2017272);宿迁学院科研创新团队项目(2018td04)。

摘　　要：以碱式碳酸钕(Nd2(C2O4)3·10H2O)为原料,Nd2(C2O4)3·10H2O在空气中热重-热差(TG-DTA)分析结果为依据,采用X射线衍射仪(XRD)、扫描电镜(SEM)和紫外-可见分光光度计(UV-Vis)分别表征了Nd2(C2O4)3·10H2O在空气中热分解产物的物相、形貌和光吸收特性。结果表明,Nd2(C2O4)3·10H2O在空气中的热分解主要分为3个阶段,第一阶段是室温至300℃,Nd2(C2O4)3·10H2O受热失去结晶水变为Nd2(C2O4)3;第二阶段是300~600℃,Nd2(C2O4)3受热分解为中间产物Nd2O2CO3;第三阶段是600~750℃,Nd2O2CO3受热分解为Nd2O3。在950℃时Nd2(C2O4)3·10H2O受热分解并保温15 min获得了Nd2O3纳米颗粒。随着Nd2(C2O4)3·10H2O热分解温度地升高,获得的Nd2O3颗粒越细,对光的吸收能力就越强。特别是Nd2O3纳米颗粒对光的吸收出现了一些较强的吸收峰和较宽的吸收带,可以极大的拓展Nd2O3纳米颗粒的光学特性应用范围。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.

关 键 词：碱式碳酸钕 热分解 Nd2O3纳米颗粒 光学特性 

分 类 号：TQ133.3[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]