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Self‐Propagating High‐Temperature Synthesis of Zirconolite Using CuO and MoO 3 as the Oxidants
Author(s) -
Zhang Kuibao,
Wen Guanjun,
Jia Zhiyong,
Teng Yuancheng,
Zhang Haibin
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12382
Subject(s) - zirconolite , materials science , radioactive waste , nuclear chemistry , self propagating high temperature synthesis , vickers hardness test , reactivity (psychology) , phase (matter) , chemical engineering , metallurgy , microstructure , organic chemistry , chemistry , medicine , pyrochlore , alternative medicine , pathology , engineering
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 (CaZrTi 2 O 7 ), was prepared by self‐propagating high‐temperature synthesis ( SHS ). CuO and MoO 3 were employed as the oxidants with Ti as the reductant. Different TiO 2 /Ti ratios were selected to investigate reactivity and adiabatic temperature ( T ad ) of the designed SHS reactions. Zirconolite was successfully synthesized as the main phase at varied TiO 2 /Ti ratios using CuO and MoO 3 as the oxidants. The as‐synthesized samples were readily solidified with desirable density and Vickers hardness.