包容核廢物的鈦酸鍶人造巖石SHS-致密化的影響因素

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Influential factors of SHS-densification method for solidifying nuclear waste in SrTiO₃ synroc

1. School of Machine, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China;
2. School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083, China

摘要: 采用自蔓延高溫合成(SHS)與加壓致密一體化技術制備了包容鍶核素(Sr²⁺)的鈦酸鍶(SrTiO₃)人造巖石固化體.通過實驗分析SHS產物致密化的影響因素,確定了鈦酸鍶反應體系自蔓延高溫合成時的最佳工藝參數:預制塊相對密度為54%左右;預壓力為10MPa,加壓時間為4s;致密化時高壓壓力為300MPa,高壓保壓時間為8s.
- 鈦酸鍶 /
- 自蔓延高溫合成(SHS) /
- 致密化 /
- 參數優化
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.
- strontium titanate /
- self-propagation high-temperature synthesis(SHS) /
- densification /
- parameter optimization