Oblast zaměření: Supravodivost
Komise : IEC/TC 90 (Superconductivity)
K připomínkám do: 21.07.2020
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This part of IEC 61788 addresses a test method for the determination of the residual resistance ratio (RRR), , of cavity-grade niobium. This method is intended for high-purity niobium grades with 150 <  < 600. The test method should be valid for specimens with rectangular or round cross-section, cross-sectional area greater than 1 mm2 but less than 20 mm2, and a length not less than 10 nor more than 25 times the width or diameter.