Self‐Propagating High‐Temperature Synthesis of Zirconolite Using CuO and MoO3 as the Oxidants
Self‐Propagating High‐Temperature Synthesis of Zirconolite Using CuO and MoO3 as the Oxidants
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DOI：
10.1111/ijac.12382
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发表时间：
2015-01
影响因子：
2.1
通讯作者：
Kuibao Zhang;Guanjun Wen;Z. Jia;Yuancheng Teng;Haibin Zhang
中科院分区：
文献类型：
--
作者：
Kuibao Zhang;Guanjun Wen;Z. Jia;Yuancheng Teng;Haibin Zhang
Synroc是公认的处置高放废物的第二代废物形式。本研究采用自蔓延高温合成法(SHS)制备了一种研究较多的合成岩矿物--锆石(CaZrTi2O7)。以CuO和MoO_3为氧化剂，钛为还原剂。选择不同的二氧化钛/钛比考察了所设计的SHS反应的反应性和绝热温度。以CuO和MoO_3为氧化剂，在不同的TiO_2/Ti比条件下，成功地合成了以锆石为主相的复合氧化物。合成的样品易于固化，具有理想的密度和维氏硬度。
Synroc is recognized as the second generation waste form for the disposal of high-level radioactive waste (HLW). In this research, one of the mostly studied Synroc minerals, zirconolite (CaZrTi2O7), was prepared by self-propagating high-temperature synthesis (SHS). CuO and MoO3 were employed as the oxidants with Ti as the reductant. Different TiO2/Ti ratios were selected to investigate reactivity and adiabatic temperature (Tad) of the designed SHS reactions. Zirconolite was successfully synthesized as the main phase at varied TiO2/Ti ratios using CuO and MoO3 as the oxidants. The as-synthesized samples were readily solidified with desirable density and Vickers hardness.