Influences of HF Gas Generation on Advanced TFA-MOD Processes for the Fabrication of YBCO-coated Conductors

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  • 改良型ＴＦＡ‐ＭＯＤ法によるＹＢＣＯ線材作製における発生ＨＦガスの影響
  • 改良型TFA-MOD法によるYBCO線材作製における発生HFガスの影響
  • カイリョウガタ TFA MODホウ ニ ヨル YBCO センザイ サクセイ ニ オケル ハッセイ HF ガス ノ エイキョウ

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Abstract

We developed a new precursor solution that consists of copper naphthenate, and yttrium- and barium-trifluoroacetates (advanced TFA solution) that can make the heating rate during calcination increase while maintaining a high Jc. In this paper, we investigated the influence of HF gas generation on the calcination process in order to optimize an advanced TFA-MOD process. The high heating rate and/or low copper content in the starting solution lead to a low Jc. In both cases, a high generation rate of HF gas was observed. Consequently, it is clear that rapid HF gas generation leads to the formation of pores that cause a reduction in Jc values.

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