Preparation and Aqueous Durability of Sr Incorporation into Rutile TiO2
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第6期
论文作者：张魁宝 WEN Guanjun YIN Dan ZHANG Haibin
文章页码：1179 - 1183
摘 要：TiO2 was employed as the waste form for disposal of simulated nuclide Sr. Preparation of Sr bearing rutile was explored under different sintering temperatures and Sr contents. The optimal treatment temperature was confirmed as 1300 ℃ for the incorporation of SrO in rutile Ti O2. Perovskite type Sr TiO3 was prepared as the resultant product. The limited containment capacity of SrO in rutile was speculated to be 56.5wt%. As the SrO content increases, the as-synthesized sample exhibits more porosity because Sr TiO3 phase demonstrates higher density than rutile and SrO. The 28 day normalized leaching rate（LRi） of Sr and Ti will decrease congruously as the SrO incorporation increases. The LRSr value is lower than 0.1g·m-2·d-1, which is about 3 orders of magnitude higher than the LRTi value.
张魁宝1,2，WEN Guanjun1，YIN Dan1，ZHANG Haibin3
1. State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, Southwest University of Science and Technology2. National Defense Key Discipline Lab of Nuclear Waste and Environmental Safety, Southwest University of Science and Technology3. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics
摘 要：TiO2 was employed as the waste form for disposal of simulated nuclide Sr. Preparation of Sr bearing rutile was explored under different sintering temperatures and Sr contents. The optimal treatment temperature was confirmed as 1300 ℃ for the incorporation of SrO in rutile Ti O2. Perovskite type Sr TiO3 was prepared as the resultant product. The limited containment capacity of SrO in rutile was speculated to be 56.5wt%. As the SrO content increases, the as-synthesized sample exhibits more porosity because Sr TiO3 phase demonstrates higher density than rutile and SrO. The 28 day normalized leaching rate（LRi） of Sr and Ti will decrease congruously as the SrO incorporation increases. The LRSr value is lower than 0.1g·m-2·d-1, which is about 3 orders of magnitude higher than the LRTi value.
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