液态锂铅合金中测氢传感器的探头材料  

Probing Materials for Measurement of Hydrogen in Liquid Lithium-Lead Alloy

作　　者：谢波[1] 吴宜灿[2] 胡胜[1] 杨通在[1] FDS团队 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《核化学与放射化学》2012年第3期179-184,共6页Journal of Nuclear and Radiochemistry

基　　金：国家ITER计划专项国内配套研究项目(2009GB109006)

摘　　要：氢同位素在液态锂铅合金中的溶解行为是聚变堆液态包层提氚系统设计的重要参考指标。为了解决液态锂铅合金中氢含量测定的技术难题,研发测氢传感器,开展了以Al2O3、SiC、SiO2-Cr2O3、TiC为候选的传感器探头材料的选型研究。研究结果表明:在仅考虑测量平衡时间、合金熔融温度和热冲击的前提条件下,SiC探头材料是最合适的选择,具有测量直观准确、高热稳定性、抗化学腐蚀性能和耐热冲击性能良好的特点;而Al2O3和SiO2-Cr2O3在高温锂铅环境中易腐蚀;TiC高温下易氧化,但在873K以下时的测量值比SiC更接近理论饱和值。The dissolution behavior of hydrogen isotopes in liquid lithium-lead alloy is an important reference for the design of tritium extraction system in fusion reactor blanket. In order to solve the technical problem of hydrogen content determination in the liquid lithiumlead alloy and to develop the sensor for measuring hydrogen, a study for selection of a hydrogen-probing material among the candidates Al2 O3, SiC, SiO2-Cr2 O3 and TiC was carried out. The results show that SiC is the most appropriate choice as a probing material if only the measurement equilibrium time, alloy melting temperature and thermal shock are taken into account. It possesses the characters of high accuracy, high thermal stability, straightforward readout, good resistance to chemical corrosion, and repeated thermal shock. The Al2O3 and SiO2-Cr2O3 are corrosible at high temperature lithium-lead environments. TiC tends to be oxidized at high temperature, but its measuring value is more close to the theoretical saturation value below 873 K measurement than SiC.

关 键 词：液态锂铅合金 氢 传感器 探头 

分 类 号：TL64[核科学技术—核技术及应用]