原子能科学技术Issue(1)：18-23,6.DOI:10.7538/yzk.2016.50.01.0018
掺钆铈独居石陶瓷固化体在 TH MC耦合作用下的化学稳定性
Chemical Durability of Gd-doped Monazite-Ce Ceramic Form under Coupling Effect of THMC
摘要
Abstract
The Gd‐doped monazite‐Ce ceramic forms were prepared by hot‐pressing using Ce2(C2O4)3 ·10H2O ,NH4H2PO4 and Gd2O3 as raw materials .The hot‐pressing sintering and chemical durability of the ceramic forms under the coupling effect of ther‐modynamics‐hydrodynamics‐mechanics‐chemistry (THMC) were investigated by means of XRD ,FESEM ,EDS ,ICP‐MS and so on .The results show that the single monazite‐type Ce0.9 Gd0.1 PO4 phase is obtained by hot‐pressing at 1 150‐1 200 ℃ for 2 h .The rela‐tive density of the ceramic form is 99.62% .Furthermore ,the ceramic forms exhibit excellent chemical durability under the coupling effect of T HMC (90‐200 ℃ (0.101‐1.554 MPa) ,pH = 5‐9) .The normalized leaching rate (LR) of Gd is 10-6‐10-5 g/(m2 · d) orders of magnitude on the 42nd day .Both leaching temperature and pH value have little influence on the LR of Ce ,while the leaching temperature has no effect on the LR of Gd .The LR of Gd is relatively higher in weakly acidic (pH=5) and neutral (pH=7) water solution than that in weakly alkaline (pH=9) water solution .关键词
独居石/钆/耦合作用/化学稳定性/热压烧结Key words
monazite/Gd/coupling effect/chemical durability/hot-pressing sintering分类
能源科技引用本文复制引用
滕元成,杨航,李玉香,吴浪,张魁宝..掺钆铈独居石陶瓷固化体在 TH MC耦合作用下的化学稳定性[J].原子能科学技术,2016,(1):18-23,6.基金项目
国家自然科学基金资助项目（11275158）；西南科技大学重点科研平台专职科研创新团队建设基金资助项目 （）
