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MAY-TP01開(kāi)閉孔率測(cè)試儀（氣體置換法）
產(chǎn)品介紹 
MAY-TP01 型開(kāi)閉孔率分析儀采用全不銹鋼金屬管路，是利用氣體膨脹法檢測(cè)發(fā)泡材料、硬質(zhì)泡沫、巖心、金屬等材料的開(kāi)孔率、閉孔率、切孔校正開(kāi)孔率、切孔校正閉孔率的全自動(dòng)分析儀器，儀器主要應(yīng)用于保溫材料、隔音材料， 金屬材料、石油勘探等行業(yè)，可測(cè)試聚氨酯泡沫、酚醛泡沫、巖心、金屬塊、土壤塊等物質(zhì)。 
工作原理 
采用阿基米德原理--氣體膨脹置換法，利用小分子惰性氣體（He 或者 N2）作為介質(zhì)，通過(guò)理想氣體狀態(tài)方程：PV=nRT 計(jì)算測(cè)試腔內(nèi)樣品所排開(kāi)的氣體體積，從而精確測(cè)量樣品的真實(shí)體積（含閉孔），再根據(jù)材料外觀體積、發(fā)泡前體積可計(jì)算出開(kāi)閉孔率.  
氣體膨脹置換法是以氣體取代液體測(cè)定樣品所排開(kāi)的體積. 此法可避免浸液法中由于樣品溶解造成的測(cè)試誤差，具有不損壞樣品的優(yōu)點(diǎn)。因?yàn)闅怏w能滲入樣品中極小的孔隙和表面的不規(guī)則孔隙，因此測(cè)出的樣品體積更接近樣品的真實(shí)體積，從而可以用來(lái)計(jì)算樣品的開(kāi)閉孔率.  
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