Home Uncategorized The sound of world’s lowest-density solid Aerogel

The sound of world’s lowest-density solid Aerogel

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The one thing I hadn’t thought about when it comes to aerogel is what it might sound like. In fact, if I had to guess
what it sounded like, I would have said “not much”, because this
hologram-like subject is almost entirely made of gas. 

Aerogel – or ‘frozen smoke’ – might be 98.2 percent air, bit sure doesn’t sound like it. Thanks to the
video below, uploaded by YouTuber turlian, we now know that aerogel sounds like, a piece of ceramic? Frosted glass?
First developed in the 1930s, aerogel is a synthetic material that’s
translucent but solid; dry and rigid, but ultra-lightweight. Used in a
range of manufacturing industries, including wetsuits, cosmetics, and weapons, it’s produced by replacing the liquid component of a gel with gas via a process called supercritical drying
The gel used can range from silicon or alumnia to chromia
or tin dioxide, which means it doesn’t have a defined chemical formula,
but does have a set structure that you have to get right in order to
create its various unusual properties. 

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What does it feel like to hold? Over at Aerogel.com,
they describe the sensation as a cross between a Styrofoam peanut,
“that green floral potting foam used for potting fake flowers”, and a
Rice Krispie treat:

“In general aerogels are pretty fragile.
Inorganic aerogels are friable and and will snap when bent or, in the
case of very low density aerogels, when poked, cleaving with an
irregular fracture. This said, depending on their density, aerogels can
usually hold a gently applied load of up to 2,000 times their weight and
sometimes more. 

But since aerogels are so low in
density, it doesn’t take much force to achieve a pressure concentration
equivalent to 2,000 times the material’s weight at a given point. The
amount of pressure required to crush most aerogels with your fingers is
about what it would take to crush a piece of Cap’n Crunch cereal.”

I also want a piece of aerogel in my life. Do you?
Source: turlian

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