真空磁導率 的英文怎麼說

中文拼音 [zhēnkōngdǎo]
真空磁導率 英文
magnetic permeability of vacuum
  • : Ⅰ形容詞(真實) true; genuine; real Ⅱ副詞1 (的確; 實在) really; truly; indeed 2 (清楚確實) cl...
  • : 空Ⅰ形容詞(不包含什麼; 裏面沒有東西或沒有內容; 不切實際的) empty; hollow; void Ⅱ名詞1 (天空) s...
  • : 名詞1. [物理學] (磁性; 能吸引鐵、鎳等的性質) magnetism 2. (瓷) porcelain; china
  • : 動詞1. (引導) lead; guide 2. (傳導) transmit; conduct 3. (開導) instruct; teach; give guidance to
  • : 率名詞(比值) rate; ratio; proportion
  • 真空 : [物理學] vacuum; empty space; vacuo
  1. The x - ray diffraction, scanning electronic microscope and the squid were used to characterize the properties of the mgb2 core in mgb2 / fe tapes and wires. the effect of the proportion of mg, b and sic as well as the sintering parameters on the phase formation, microstructure and the critical current densities of mgb2 / fe tapes and wires was discussed in details. the results showed that the high purity of mgb2 core could be synthesized by both the traditional vacuum sintering and the sparking plasma sintering and the vacuum sintering environment restrained the oxidation of mg effectively

    相對于傳統燒結, sps燒結方式成相速度快、樣品晶粒細小均勻、 mgb2超芯緻密性好、晶間連接優良,因而sps燒結樣品的臨界電流密度明顯高於傳統燒結樣品,其中未摻雜的帶材樣品經過sps800 , 15分鐘燒結后,自場下的臨界電流密度jc值在10k時達到8 . 64 105a / cm2 ,而且隨著測量溫度和外加場的增加, sps燒結樣品的臨界電流密度下降比傳統燒結樣品緩慢,在20k ,自場時為5 . 97 105a / cm2 , 20k , 3t時,臨界電流密度值仍大於104a / cm2 。
  2. The traditional molecular pump with popular bearing can not meet the challenge of semiconductor manufacturing because of the vibration, short life, unpure vacuum and so on. so it is very important to design the magnetic bearing and power amplifier for molecular pump

    本課題研究的目的是,解決傳統軸承型分子泵應用在半體製造行業時出現轉速低、壽命短、不潔凈等問題,設計分子泵的懸浮軸承結構和功放大器,對實現分子泵在半體工業中的良好應用有著重要的意義。
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