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Fabrication of silica aerogel composite blankets from an aqueous silica aerogel slurry
Ceramics International, 2018Abstract Low-density silica aerogel composite blankets were successfully fabricated from silica aerogel slurries via an impregnation technique. Silica aerogel powder formed a stable slurry in a mixed ethanol/water solution with a polyvinyl alcohol (PVA) binder.
Kyoung-Jin Lee +4 more
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Journal of Non-Crystalline Solids, 1998
Abstract This paper begins with the story of monolithic, transparent silica aerogels when in 1968 a paper was published by Nicolaon and Teichner where at the end of it two lines quoted that “⋯in a basic medium, the aerogels so obtained were totally transparent even through a thickness of 1 cm”.
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Abstract This paper begins with the story of monolithic, transparent silica aerogels when in 1968 a paper was published by Nicolaon and Teichner where at the end of it two lines quoted that “⋯in a basic medium, the aerogels so obtained were totally transparent even through a thickness of 1 cm”.
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Applied Physics A Solids and Surfaces, 1993
In this contribution we have studied the key electrical parameters of silica aerogels and of silica-aerogel-based composites, namely the dielectric constants ɛ, the dielectric losses tan δ (at 1 kHz), and the breakdown fields E b (at 50 Hz). For low-density bulk silica aerogels we find ɛ=1.25 and tan δ=0.0005.
P. Br�esch +8 more
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In this contribution we have studied the key electrical parameters of silica aerogels and of silica-aerogel-based composites, namely the dielectric constants ɛ, the dielectric losses tan δ (at 1 kHz), and the breakdown fields E b (at 50 Hz). For low-density bulk silica aerogels we find ɛ=1.25 and tan δ=0.0005.
P. Br�esch +8 more
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Silica aerogel vibration testing
Classical and Quantum Gravity, 2001As has been shown in previous experiments (Dolesi R et al 2000 J. Low Temp. Phys.?118 219), a porous silica aerogel network can adequately constrain on-orbit motion of superfluid helium, and subsequently remove the possibility of a `helium tide' gravitational disturbance appearing in the Satellite Test of the Equivalence Principle (STEP) signal ...
Wang, S., Torii, R., Vitale, S.
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Applications for silica aerogel products
Journal of Non-Crystalline Solids, 1998Abstract Aerogels, nanoporous lightweight materials, were discovered more than 60 years ago. The supercritical manufacturing process and expensive raw materials typically used to produce aerogels prohibited commercialization on an industrial scale. Recently, a commercially attractive ambient pressure production process was developed which will allow ...
M Schmidt, F Schwertfeger
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Synthesis and grafting of silica aerogels
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2004The attack of sand with a solution of sodium hydroxide allows to synthesize a soluble metasilicate. Sodium ions were substituted by ammonium ions in order to synthesize pure silica gel. The obtained silica aerogels were amorphous. The variation of specific area and porous volume with silica concentration in the sol, with the pH of destabilization and ...
S. Marzouk +3 more
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Biopolymer-Containing Aerogels: Chitosan-Silica Hybrid Aerogels
2011Hybrid aerogels comprising bioderived polymers and metal oxides have been explored in the case of chitosan and silica. The physical properties of homogeneous aerogels have been explored extensively and structural models have been formulated on the basis of the data.
Chunhua Jennifer Yao +2 more
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