帯溶融精製銅の残留電気抵抗

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書誌事項

タイトル別名
  • Residual Resistance of Zone Refined Copper
  • オビ ヨウユウ セイセイ ドウ ノ ザンリュウ デンキ テイコウ

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抄録

Residual resistance ratio was measured for the evaluation of the purity of a zone refined copper which had an original purity of 99.999%. Spectrographic analysis was also carried out. Size effect of wire specimens was studied, and ρB×l=7.6×10−12 ohm-cm2 was obtained, where ρB is the specific resistivity for bulk material and l is the mean free path of electrons. Two kinds of specimens obtained from the same ingot, namely drawn wire and chipped specimens were studied and the latter specimens indicated R4.2⁄R273=6.0×10−4, in the purest part of the ingot. The observed value is presumed to correspond to R4.2⁄R273=5.4×10−4 for bulk copper, if the size effect is taken into account. Comparing with the zone refined copper, residual resistance retio of three pieces of commercial copper wire were also measured.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (3), 149-155, 1964

    公益社団法人 日本金属学会

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