包容核废物的钛酸锶人造岩石SHS-致密化的影响因素
Influential factors of SHS-densification method for solidifying nuclear waste in SrTiO3 synroc
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摘要: 采用自蔓延高温合成(SHS)与加压致密一体化技术制备了包容锶核素(Sr2+)的钛酸锶(SrTiO3)人造岩石固化体.通过实验分析SHS产物致密化的影响因素,确定了钛酸锶反应体系自蔓延高温合成时的最佳工艺参数:预制块相对密度为54%左右;预压力为10MPa,加压时间为4s;致密化时高压压力为300MPa,高压保压时间为8s.Abstract: SrTiO3 in which Sr2+ is included was solidified by self-propagation high-temperature synthesis (SHS). Some influential factors on the solid dendification were analyzed by experiment. The optimal process parameters for preparing SrTiO3 and composites were determined as the following:the preform density of 56%; the pre-pressure of 10 MPa, the pressing time of 4 s; the high pressure of 300 MPa, the dwell time of 8 s under high pressure.