The purities of tin(3 N,4 N,5 N)and tin bars purified by zone purification have been measured by the residual resistivity ratio(RRR)method.
采用剩余电阻率比(RRR)方法对3N,4N,5N纯度的Sn和区域提纯Sn棒的纯度进行了测量。
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