نتایج جستجو برای: silica aerogel
تعداد نتایج: 38570 فیلتر نتایج به سال:
Cellulose aerogel is an advanced thermal insulating biomaterial. However, the application of cellulose in insulation still faces critical problems, for instance, relatively low strength and large pore size without Knudsen effect. In this study, a silica areogel made from olivine rather than traditional tetraethoxysilane or water glass employed to synthesize silica-cellulose composite applying f...
An optically transparent and thermally insulating (OTTI) silica aerogel demonstrates promising results for various solar thermal applications, particularly concentrated power systems. Higher system efficiency can be achieved by integrating OTTI materials reducing heat loss at higher receiver temperature. However, the stability of aerogels has been one limiting factors. Here, we report that Al2O...
We report theoretical results for heat transport by quasiparticle excitations in superfluid $^3$He infused into silica aerogel engineered with uniaxial anisotropy. For this system two distinct equal spin pairing (ESP) phases have been reported based on NMR spectroscopy. Theoretical analysis predicts the first ESP state to be chiral A phase axis aligned along strain axis, and lower temperature a...
Silica aerogel is a class of nanoporous material with extremely high porosity (85–99.9 %) and specific surface area (500–1200 m2/g), as in cause very low density, thermal conductivity. But silica have some disadvantages. One this disadvantages cost. In study, to solve problem has been used cost precursor which rice husk ash. Also, we try improve porosity. To the expanded perlite (EP). produced ...
Cellulose-Derived Aerogels In article number 2102892, Saad A. Khan and co-workers highlight the historical background recent scientific achievements in design, development, performance of hybrid aerogels derived from cellulose. The impact various approaches to incorporate organic inorganic moieties including silica, metal–organic frameworks (MOFs), graphene within aerogel matrix is investigated...
Aerogel is a nanoporous solid material with ultrahigh porosity, ultralow density, and thermal conductivity, which considered to be one of the most promising high-performance insulation materials today. However, traditional pure inorganic aerogels (i.e., silica aerogel) exhibit inherent structural brittleness, making their processing handling difficult, manufacturing costs are relatively high, l...
Abstract This study is aimed to investigate the effect of carbon nanotubes on properties lightweight aggregate concrete containing expanded glass and silica aerogel. Combinations (55%) hydrophobic aerogel particles (45%) were used as aggregates. Carbon sonicated in water with polycarboxylate superplasticizer by ultrasonication energy for 3 min. Study results show that incorporating multi-wall s...
The purpose of the study is preparation silica aerogels by using hydro(solvo)thermal synthesis assisted sol-gel method, SiO2 particle-added aerogels, and investigation their potential use in environment energy fields. It has been observed that prepared can be used as an adsorbent for organic contaminant removal applications. progressed rapidly reaction NaBH4 with methanol particle embedded aero...
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