laetogel

2024-05-14


One of the best-known and most useful physical properties of aerogel is its incredible lightness-it typically has a density between 0.0011 to 0.5 g cm-3, with a typical average of around 0.020 g cm-3. This means that aerogel is usually only 15 times heavier than air, and has been produced at a density of only 3 times that of air.

Aerogel adalah materi padat yang memiliki tingkat kepadatan yang sangat rendah. Materi yang juga disebut sebagai solid smoke ini memiliki komposisi udara yang mencapai 99,8 persen. Banyaknya kandungan udara pada aerogel dapat tercapai karena dalam pembuatannya, substansi cair pada gel diganti dengan udara, tanpa merusak struktur padatnya.

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The remarkable properties of a silica aerogel are the result of its nanoscale structure. To visualize that structure, think of holding a pile of small, clear particles in your hand. Imagine that the particles touch one another and slightly stick together, leaving gaps between them that are filled with air.

A block of silica aerogel in a hand. Aerogels are a class of synthetic porous ultralight material derived from a gel, in which the liquid component for the gel has been replaced with a gas, without significant collapse of the gel structure. The result is a solid with extremely low density and extremely low thermal conductivity.Aerogels can be made from a variety of chemical compounds.

Aerogels are a diverse class of porous, solid materials that exhibit an uncanny array of extreme materials properties. Most notably aerogels are known for their extreme low densities (which range from 0.0011 to ~0.5 g cm-3).In fact, the lowest density solid materials that have ever been produced are all aerogels, including a silica aerogel that as produced was only three times heavier than air ...

Ramsdellite MnO 2 (R-MnO 2) microspheres 28. 10.04 g Mn (NO 3) 2 ·4H 2 O (Sigma Aldrich) was dissolved in distilled water (50 wt%). Then, 100 ml of a 3.06 wt% KMnO 4 aqueous solution was added ...

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Initially, it took more time to prepare aerogel samples [], however, later Teichner et al. proposed a quicker method of aerogel synthesis using tetramethyl orthosilicate (TMOS) as the precursor along with water and a catalyst by sol-gel process [].Later various research groups having worked on aerogels observed that tetraethyl orthosilicate (TEOS) is a safer alternative raw material with ...

What is Aerogel? How is it made, what are its properties and uses? How good of an insulator is it, really? (The pyromaniac jokes have started in my family.....

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