改进正电子湮灭寿命谱法研究高孔隙度纳米材料

2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO) Pub Date : 2018-04-01 DOI:10.1109/ELNANO.2018.8477443

H. Klym, O. Shpotyuk, A. Ingram, I. Karbovnyk

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引用次数: 1

摘要

以具有先进纳米多孔性的湿敏MgO-Al2O3陶瓷为例，提出了一种改进的正电子湮灭谱测量方法。结果表明，将光谱扩展为四个组分，可以估计纳米尺度并研究其中发生的过程。结果表明，半径为~ 1.5 nm的纳米粒子比半径为~ 0.3 nm的孔隙所占比例高一个数量级，后者也发生了吸附水中的正电子湮灭。

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Modified Positron Annihilation Lifetime Spectroscopy Method for Investigation of Nanomaterials with Advanced Porosity

Modified method for measuring of positron annihilation spectra on the example of humidity-sensitive MgO-Al2O3 ceramics with advanced nanoporousity is proposed. It is shown that in the expansion of spectra into four components it is possible to estimate the nanopor sizes and to study the processes occurring in them. It was established that the nanoparticle fraction with a radius of ∼ 1.5 nm is an order of magnitude higher than the proportion of pores with a radius of ∼ 0.3 nm, in which also the ortho-positronium annihilation in adsorbed water occurs.

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2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)

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