نتایج جستجو برای: carbon aerogel

تعداد نتایج: 282705  

2004
Ruowen Fu Bo Zheng Jie Liu Steve Weiss Jackie Y. Ying Mildred S. Dresselhaus Gene Dresselhaus Joe Satcher Theodore Baumann

The carbon aerogels prepared by a new method through gelation and supercritical drying in isopropanol were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy, and a surface area analyzer. Their chemical structure, morphology, and pore structure are discussed. We found that all of these carbon aerogel (CA-IPA) samples have almost the same carbon and oxygen elem...

Aerogels are a special class of porous material, which have excellent physicochemical properties such as low density, high porosity, high surface area and adjustable surface chemistry. Aerogels were first prepared several decades ago, but never truly commercialized due to their high cost. Technological advancements in the production and quality of different types of aerogel cut costs down and m...

2001
Priya Sharma

The equilibrium superfluid phase of He impregnated into high-porosity silica aerogels appears to be a non-equal-spin-pairing state in zero field at all pressures, which is generally assumed to be the Balian-Werthamer (BW) phase modified by the depairing effects of the aerogel structure. The nuclear magnetic susceptibility played a key role in identifying the B-phase of pure He with the BW state...

Journal: :Science China. Materials 2022

V4+-rich V2O5/carbon aerogel (V4+-V2O5/CA) composites were synthesized as electrode materials for supercapacitors via in-situ hydrolysis-condensation processing. Carbon (CA) promotes the deposition of amorphous vanadium oxide and catalyzes crystallization V2O5 nanosheets at much reduced temperature. With a uniform distribution in CA, special structure provides large specific area reactive sites...

Journal: :Coatings 2021

In this paper, we wish to report the preparation of ultra-black films via spraying coatings composed waterborne binders and low-cost carbon aerogels on pre-treated tinplate. The CAs were prepared by annealing resorcinol-formaldehyde resin (RF resin) following CO2 activation, which reflectance was less than 0.4% in a wide wavelength range. different coatings, using as functional pigments, ranged...

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