Accurate bulk density determination of irregularly shaped translucent and opaque aerogels

作者：Petkov M P^*; Jones S M

来源：Applied Physics Letters, 2016, 108(19): 194104.

DOI：10.1063/1.4948653

We present a volumetric method for accurate determination of bulk density of aerogels, calculated from extrapolated weight of the dry pure solid and volume estimates based on the Archimedes' principle of volume displacement, using packed 100 mu m-sized monodispersed glass spheres as a "quasi-fluid" media. Hard particle packing theory is invoked to demonstrate the reproducibility of the apparent density of the quasi-fluid. Accuracy rivaling that of the refractive index method is demonstrated for both translucent and opaque aerogels with different absorptive properties, as well as for aerogels with regular and irregular shapes. Published by AIP Publishing.

• 出版日期2016-5-9