Low-refractive index silica aerogel is the most convenient radiator for threshold-type Cherenkov counters, which is used for particle identification in high-energy physics experiments. For the BELLE detector at the KEK B-Factory, we have produced about 2 m of hydrophobic silica aerogels of n = 1.01 1.03 using a new production method. The particle identification capability of the aerogel Cherenk...

With the worsening of the oil-product pollution problem, oil-water separation has attracted increased attention in recent years. In this study, a porous three-dimensional (3D) carbon aerogel based on cellulose nanofibers (CNFs), poly(vinyl alcohol) (PVA) and graphene oxide (GO) was synthesized by a facile and green approach. The resulting CNF/PVA/GO aerogels were synthesized through an environm...

For hypernuclear experiments, which are currently performed at GSI (HypHI) or proposed for FAIR (PANDA) and for MAMI (A1), an unambiguous kaon identification is essential. An aerogel Čerenkov counter was designed for the KAOS spectrometer at the Mainz Microtron MAMI for the discrimination between kaons and pions of momenta p ≥ 1GeV/c. Before the construction of the final detector a smaller prot...

Aerogels have much potential in both research and industrial applications due to their high surface area, low density, and fine pore size distribution. Here we report a thorough structural study of three-dimensional aerogels composed of highly crystalline sp(2)-bonded boron nitride (BN) layers synthesized by a carbothermic reduction process. The structure, crystallinity and bonding of the as-pr...

In this paper, the Diffusion Limited Cluster Aggregation (DLCA) method is employed to reconstruct the three-dimensional network of silica aerogel. Then, simulation of nitrogen adsorption at 77 K in silica aerogel is conducted by the Grand Canonical Monte Carlo (GCMC) method. To reduce the computational cost and guarantee accuracy, a continuous-discrete hybrid potential model, as well as an adso...

In series of papers [1, 2] Fomin introduced and discussed the so-called robust phases in a system with frozen orientational disorder (with application to superfluid 3 He in aerogel). We show that his consideration is based on the erroneous overestimation of the fluctuation energy which comes from the interaction of the Goldstone modes with the frozen disorder. This interaction leads to the Imry...

We present a theoretical study of the phase diagram and the structure of a fluid adsorbed in high-porosity aerogels by means of an integral-equation approach combined with the replica formalism. To simulate a realistic gel environment, we use an aerogel structure factor obtained from an off-lattice diffusion-limited cluster-cluster aggregation process. The predictions of the theory are in quali...

In series of papers [1, 2] Fomin introduced and discussed the so-called robust phases in a system with frozen orientational disorder (with application to superfluid 3 He in aerogel). We show that his consideration is based on the erroneous overestimation of the fluctuation energy which comes from the interaction of the Goldstone modes with the frozen disorder. This interaction leads to the Imry...

The effect of inhomogeneous perturbations created by a nematic aerogel in liquid 3He on the form order parameter arising at transition to superfluid state is studied. It shown that stability boundary distorted polar Anderson–Brinkman–Morel phase can arise just line certain characteristics aerogel. A symmetry-based argumentation for choice aerogels most suitable stabilizing given.

Silica aerogels are popular in terms of production volume and real-world applications. Although the current market growth rate is driven exclusively by thermal insulation, may also be attractive for acoustic applications with potential aiding sound absorption/insulation. This paper a summary acoustics related studies silica aerogel-based products. It introduces aerogels, some characterization m...