期刊
ADVANCED ENGINEERING MATERIALS
卷 20, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.201700745
关键词
Boron nitride sheets (BNs); Segregated structure; Thermal conductivity; 5A molecular sieve
资金
- National Magnetic Confinement Fusion Science Program [2013GB108002, 2014GB112005]
- Science and Technology Project of Sichuan Province [2017JZ0001]
5A molecular sieves have been widely used as adsorbents in cryogenic distillation for hydrogen isotope separation in fusion reactor engineering, but its low thermal conductivity is detrimental to the process stability. Improving the thermal conductivity of 5A molecular sieves is one of the most important goals for high-performance devices. Here, firm segregated structures with boron nitride sheets (BNs) are constructed around 5A molecular sieve particles. SEM results show 30 mu m BNs tend to form the better networks in comparison with that of 0.12 mu m BNs at 40wt% loadings. It is further verified that BNs with the larger size promote the thermal conductivity. Meanwhile, the thermal conductivity increases with the increasing amounts of BNs. XRD and specific surface area results indicate that the sintering and the addition of BNs exert negligible effects on the structure of 5A molecular sieve. These results indirectly show 5A molecular sieve with BNs segregated structures is very likely to be used for the application of hydrogen isotopic separation. Besides, this work provides new insight into the construction of segregated structure in inorganic porous materials.
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