CN 102400216 A

Abstract

一种射频超导腔用单晶粒铌材制造方法，是以高熔点金属铌为原料精炼提纯，制备出晶粒尺寸Φ100mm以上，残余电阻比率RRR值300以上的铌锭，然后切出单个晶粒，采用碾压的方式轧制，再经热处理制备成单晶铌板或片；精炼提纯是采用真空电子束对高熔点金属铌进行多次熔炼提纯，生产出Φ250mm以上的铸锭，其最大晶粒直径为100－140mm，且铸锭的残余电阻比率RRR值在300以上。

English (machine translation): A single crystal grain niobium material for a radio frequency superconducting cavity is prepared by refining and purifying high-melting-point metal niobium serving as a raw material to prepare a niobium ingot with the grain size phi of more than 100mm and the residual resistance ratio RRR value of more than 300, then cutting out single crystal grains, rolling in a rolling mode, and then performing heat treatment to prepare a single crystal niobium plate or sheet; the refining and purification are to adopt vacuum electron beams to carry out multiple times of smelting and purification on the hig…

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