用于射频超导腔制造的大晶粒铌材热导研究（英文）  

Thermal conductivity investigation of large grain niobium material used for fabrication of SRF cavities

作　　者：陈励治 郝建奎[1] 陈术[1] 倪志茂 郭鑫[1] 刘克新[1] 

机构地区：[1]北京大学物理学院重离子物理研究所,核物理与核技术国家重点实验室,北京100871

出　　处：《强激光与粒子束》2017年第6期81-85,共5页High Power Laser and Particle Beams

基　　金：supported by National Basic Research Program of China(2011CB808303,2014CB845504)

摘　　要：大晶粒铌材由于声子峰效应在2K温度具有良好的热导,这有助于提高超导腔的热稳定性。对宁夏东方钽业股份有限公司(OTIC)生产的大晶粒铌材在不同热处理条件下的热导和晶格缺陷开展了研究,结果表明经过超过800℃的热处理,OTIC的大晶粒铌材能够恢复声子峰,这与之前DESY的测量结果不同。认为用其加工的超导腔有望具备较好热稳定性。Large grain niobium has good thermal conductivity at 2 K temperature because of the phonon peak, which is helpful to improve the thermal stability of superconducting cavities. The investigation into thermal conductivity and crystal imperfection of the large grain niobium material developed by Ningxia Orient Tantalum Industry Co. ,Ltd （OTIC） with different heat treatments has been carried out. Results show the phonon peak of OTIC large grain niobium can be recovered by heat treatment at a temperature of more than 800 ℃, which is different from previous measurements at DESY. In this paper we present the experiments, results and discussion of thermal conductivity investigation of OTIC large grain niobium.

关 键 词：大晶粒铌材 声子峰 热导 热处理 

分 类 号：TL503[核科学技术—核技术及应用]