Harry Reid Center for Environmental Studies, University of Nevada, Las Vegas, Box 454009, 4505 Maryland Parkway, Las Vegas, Nevada 89154, USA.
Inorg Chem. 2011 Nov 7;50(21):11004-10. doi: 10.1021/ic201552g. Epub 2011 Oct 13.
The synthesis of (U,Th)O(2) solid solutions at a relatively low temperature of 1100 °C using a new technique is described. First, separate actinide oxides were reacted with ammonium hydrogen fluoride to form ammonium actinide fluorides at room temperature. Subsequently, this fluoride was converted to an actinide oxide solid solution using a two-phase reaction process, which involved heating of the fluoride first at 610 °C in static air followed by heating at 1100 °C in flowing argon. Oxide solid solutions of UO(2) and ThO(2) were synthesized for a ThO(2) content from 10 to 90 wt %. Microscopic investigation showed that the (U,Th)O(2) solid solutions synthesized using this method had high crystallinity and homogeneity up to nanoscale.
采用一种新技术在相对较低的 1100°C 温度下合成（U，Th）O（2）固溶体。首先，将单独的锕氧化物与氟化氢铵在室温下反应形成铵锕氟化物。随后，通过两相反应过程将该氟化物转化为锕氧化物固溶体，该过程包括首先在静态空气中于 610°C 加热，然后在流动氩气中于 1100°C 加热。合成了 UO（2）和 ThO（2）的氧化物固溶体，其中 ThO（2）的含量为 10 至 90wt%。微观研究表明，用该方法合成的（U，Th）O（2）固溶体具有高达纳米级的高结晶度和均一性。
