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Combined NMR cryoporometry and relaxometry

机译:结合NMR低温法和弛豫法

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Both cryoporometry and relaxometry probe the surface-to-volume ratio of a porous material. Nuclear magnetic resonance (NMR) relaxometry uses the random motion of molecules, whereas cryoporometry uses the melting-point depression of a confined liquid. An NMR setup has been built to simultaneously perforin cryoporometry and relaxometry measurements. Using materials with a well-defined pore size, i.e. silica gels, both methods are compared with the standard N-2-adsorption technique, and a good correlation is found. The methods can be used in the pore size range between 1 and 100 nm. By performing NMR relaxometry during cryoporometry, more information about the pore-size distribution can be obtained. Besides for silica gels, this is demonstrated for mortar, which has a complicated pore structure. [References: 32]
机译:低温测量法和张弛测量法均探测多孔材料的表面体积比。核磁共振(NMR)弛豫法使用分子的随机运动,而低温法使用密闭液体的熔点降低。已经建立了NMR设置,可以同时进行低温透孔法和弛张法测量。使用孔径大小明确的材料(例如硅胶),将这两种方法与标准的N-2-吸附技术进行了比较,并发现了良好的相关性。该方法可以在1至100nm的孔径范围内使用。通过在低温测量过程中进行NMR弛豫测量,可以获得有关孔径分布的更多信息。除了硅胶以外,砂浆还具有复杂的孔结构,这也得到了证明。 [参考:32]

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