Preparation and properties of rare earth doped silicon-based aerogels and composites

doi:10.19936/j.cnki.2096-8000.20241028.006

Abstract

Abstract: In order to obtain aerogel insulation materials with resistance to γ radiation, a rare earth-based aerogel composite material was developed in this paper obtained by hydrolysis and polycondensation. Silica sol, gadolinium nitrate and lanthanum nitrate were used to obtain a rare earth-based aerogel composite material with glass fiber. The results show that rare earth-based aerogels have typical characteristics of nanoporous materials. After heat treatment at 900 ℃, both the shrinkage rate and the specific surface area of gadolinium-based aerogels are much smaller than that of SiO₂ aerogels, besides, there is no difference of the mechanical properties of gadolinium-based aerogel composite materials after irradiation treatment, which indicates that the materials has both radiation resistance and thermal insulation properties, providing an important guarantee for the safe and efficient operation of nuclear reactors.

Key words: rare earth base, composite aerogel, radiation resistance, heat insulation, composites

CLC Number:

TB332

YANG Bin, SUN Liangyou, YANG Lifen, GAO Qingfu, LI Muyi. Preparation and properties of rare earth doped silicon-based aerogels and composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(10): 40-44.

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