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氦氣的用途

利用(yong)(yong)(yong)(yong)其－268.9℃的(de)(de)(de)低(di)沸點，液氦可(ke)以用(yong)(yong)(yong)(yong)于(yu)超低(di)溫(wen)冷(leng)卻。在懸浮列車等(deng)(deng)領(ling)(ling)域中(zhong)廣(guang)受(shou)關注的(de)(de)(de)超導體(ti)(ti)應(ying)用(yong)(yong)(yong)(yong)中(zhong)，氦氣(qi)(qi)(qi)(qi)是(shi)不(bu)可(ke)或缺(que)的(de)(de)(de)。此外，由于(yu)化學性質(zhi)不(bu)活潑和(he)輕于(yu)空氣(qi)(qi)(qi)(qi)等(deng)(deng)特征，氦氣(qi)(qi)(qi)(qi)常用(yong)(yong)(yong)(yong)于(yu)飛(fei)船或廣(guang)告(gao)氣(qi)(qi)(qi)(qi)球(qiu)中(zhong)的(de)(de)(de)充(chong)(chong)入氣(qi)(qi)(qi)(qi)體(ti)(ti)，這(zhe)一(yi)用(yong)(yong)(yong)(yong)途(tu)(tu)也是(shi)眾所周知的(de)(de)(de)。在海(hai)洋(yang)開發領(ling)(ling)域的(de)(de)(de)呼吸用(yong)(yong)(yong)(yong)混合氣(qi)(qi)(qi)(qi)體(ti)(ti)中(zhong)，以及醫(yi)療領(ling)(ling)域的(de)(de)(de)核磁共振成(cheng)像設備的(de)(de)(de)超導電(dian)磁體(ti)(ti)冷(leng)卻的(de)(de)(de)用(yong)(yong)(yong)(yong)途(tu)(tu)中(zhong)，氦氣(qi)(qi)(qi)(qi)都得到廣(guang)泛的(de)(de)(de)應(ying)用(yong)(yong)(yong)(yong)：軍工、科研、石化、制(zhi)冷(leng)、醫(yi)療、半導體(ti)(ti)、管道檢漏(lou)(lou)、超導實驗、金(jin)屬制(zhi)造、深海(hai)潛(qian)水、高精(jing)度(du)焊(han)接、光電(dian)子產品生(sheng)產等(deng)(deng)。可(ke)用(yong)(yong)(yong)(yong)于(yu)低(di)溫(wen)冷(leng)源(yuan)和(he)超導技術。也可(ke)用(yong)(yong)(yong)(yong)作(zuo)高真空裝置、原子核反(fan)(fan)應(ying)堆(dui)、宇宙飛(fei)船等(deng)(deng)的(de)(de)(de)檢漏(lou)(lou)劑及鎂、鋯、鋁、鈦等(deng)(deng)金(jin)屬焊(han)接的(de)(de)(de)保護(hu)氣(qi)(qi)(qi)(qi)。在火箭、宇宙飛(fei)船事用(yong)(yong)(yong)(yong)作(zuo)輸送(song)液氫、液氧等(deng)(deng)液體(ti)(ti)推進劑的(de)(de)(de)加(jia)壓氣(qi)(qi)(qi)(qi)體(ti)(ti)。還(huan)用(yong)(yong)(yong)(yong)作(zuo)原子反(fan)(fan)應(ying)堆(dui)的(de)(de)(de)清(qing)洗劑、氣(qi)(qi)(qi)(qi)體(ti)(ti)色譜(pu)分(fen)析分(fen)析的(de)(de)(de)載(zai)氣(qi)(qi)(qi)(qi)、氣(qi)(qi)(qi)(qi)球(qiu)充(chong)(chong)氣(qi)(qi)(qi)(qi)、電(dian)弧(hu)焊(han)用(yong)(yong)(yong)(yong)保護(hu)氣(qi)(qi)(qi)(qi)、潛(qian)水用(yong)(yong)(yong)(yong)混合氣(qi)(qi)(qi)(qi)和(he)氣(qi)(qi)(qi)(qi)體(ti)(ti)溫(wen)度(du)計的(de)(de)(de)填(tian)充(chong)(chong)氣(qi)(qi)(qi)(qi)。