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像雾一样的固体物质

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小编摘要:气凝胶开始是作为一种化学凝胶物的。然后胶体在压力很强的锅里变干,成为了一种重量很轻、很干燥、类似海绵状,看起来像固体烟雾的物体。

Frozen Smoke
固体烟




Male: What's as light as smoke but strong as a brick?

Female: I'm gonna take a while guess and say... aerogel?

Male: Sorry,yaoyao,the answer is... Wait a second! Did you say aerogel? How did you know?

F:Yeap! Did you know that aerogel is the lightest solid on earth?

M: I was going to tell you that.

F: Another cool thing is that it starts out as a kind of chemical Jello. Then the gel is dried in a powerful pressure cooker and emerges as a very lightweight, dry, sponge- like material that looks like frozen smoke.

M: OK! Did you know that aerogel is ninety-nine-point-eight percent air?

F: Sure.That was in your notes.And it’s incredibly light–one thousand times less dense than glass. But it's also really strong and an excellent insulator.

M: Is there anything you don't know about aerogel? For instance,scientists are using it to try to capture dust particles from the tail of a comet. When the particlesslam into an aerogelpanel aboard a space probe, they'll bury themselves inside and leave visible trails. Since aerogel is mostly air, it won't damage the particles.

F: Actually, I know that too.



男:什么东西既可以跟烟一样轻,又可以跟砖块一样重?

女:让我想会儿... 气凝胶?

男:瑶瑶,不好意思,答案是... 等等!你说的是气凝胶吗?你是怎么知道的?

女:是的!你知道气凝胶是地球上最轻的固体吗?

男:我刚刚正要告诉你呢!

女:了不起的是,气凝胶开始是作为一种化学凝胶物的。然后胶体在压力很强的锅里变干,成为了一种重量很轻、很干燥、类似海绵状,看起来像固体烟雾的物体。

男:是的!那你知道气凝胶中99.8%都是空气吗?

女:知道啊!你的笔记中有的!气凝胶相当的轻,轻到密度只有玻璃的千分之一。但它也很结实,是几号的绝缘体。

男:关于气凝胶,你还有什么不知道的吗?比如说,科学家正在试图用它捕捉彗星经过的微尘。当(微尘)颗粒猛烈撞击到航空探测器上的气凝胶板时,它们将会自然,从而留下可见的痕迹。因为气凝胶差不多等同于空气,并不会破坏(微尘)颗粒。

女:其实这个我也知道!

【Words & Expressions】

aerogel:气凝胶,又称为干凝胶。是一种固体物质形态,世界上密度最小的固体。当凝胶脱去大部分溶剂,使凝胶中液体含量比固体含量少得多,或凝胶的空间网状结构中充满的介质是气体,外表呈固体状,这即为干凝胶,也称为气凝胶。

slam into:猛烈撞击
space probe:航空探测器

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2012-01-12 18:50 编辑:pliny
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