原子能科学技术2016，Vol.50Issue(3)：418-423,6.DOI:10.7538/yzk.2016.50.03.0418
钙钛锆石的自蔓延高温合成与热力学分析
SHS of Zirconolite and Its Thermodynamic Analysis
摘要
Abstract
Zirconolite (CaZrTi2 O7 ) was prepared by self‐propagating high‐temperature synthesis (SHS) using Fe2 O3 ,CrO3 and Ca(NO3 )2 as the oxidants and Ti as the reduc‐tant .The adiabatic temperature was calculated ,and the combustion temperature was measured in this paper . The different molar ratios of TiO2 to Ti (TiO2 ∶ Ti) in the Ca(NO3 )2 reaction system were explored to investigate the combustion temperature of the designed SHS reactions .The results show that the SHS process can be sustained for all the designed reactions .However ,pyrochlore (Ca2Ti2O6 ) ,perovskite (CaTiO3 ) , Zr5 Ti7 O24 and trace of rutile (TiO2 ) were prepared using Fe2 O3 and CrO3 as the oxi‐dants .Zirconolite is successfully synthesized as the main phase with CaTiO3 and TiO2 as the minor phases when Ca(NO3 )2 is employed as the oxidant .The combustion tempera‐tures are much lower than the thermodynamically calculated adiabatic temperatures . Meanwhile ,the decrement of TiO2 ∶Ti is beneficial for the high adiabatic temperatures and combustion temperatures when using Ca(NO3 )2 as the oxidant .关键词
自蔓延高温合成/钙钛锆石/烧绿石/热力学Key words
self-propagating high-temperature synthesis/zirconolite/pyrochlore/ther-modynamics分类
资源环境引用本文复制引用
张魁宝,冠军,尹丹,彭乐,滕元成,李玉香,张海斌..钙钛锆石的自蔓延高温合成与热力学分析[J].原子能科学技术,2016,50(3):418-423,6.基金项目
国家自然科学基金资助项目（51202203）；西南科技大学杰出青年科技人才支持计划资助项目 （）
