Views: 4147|Replies: 1

可以在你手中融化的稀有金属:金属镓 [Copy link] 中文

Rank: 8Rank: 8

August's Best Contributor 2012 July's Best Contributor 2012

Post time 2013-5-14 18:43:06 |Display all floors


Remember those liquid metal Terminators from the Arnold Schwarzenegger movies? What if I told you that kind of material isn’t just the fruit of someone’s sci-fi imagination, but a real metal? It’s called Gallium and it has some pretty cool properties.

还记得《终结者》中像液体一样可以流动的金属终结者吗?那并不是科幻电影中的虚构物,而是真实存在的。这种金属叫做镓,具有一些相当棒的属性。

So what makes gallium so special? Well, first of all, the brittle metal has a melting point of just 29.76 °C (85.57 °F), so if you hold it in your hand long enough it will become liquid. That alone is pretty cool, but this rare metal has a few other amazing properties. For example, it “attacks” other metals, like aluminum. As you’re about to see in one of the videos below, just a drop of liquid gallium weakens the structure of a Coke can to the point where it can be pierced with the slight press of the thumb. Gallium infiltrates the aluminum structure, compromising its integrity and making the can feel like tin foil instead of metal. Another interesting experiment involving gallium is called the “beating heart”, in which the amazing element is made to look like an alien life form. When submerged in sulfuric acid and a dichromate solution, gallium looks like an organic beating heart, due to the gallium sulfate which increases surface tension.

是什么让金属镓如此的特殊?首先,这种金属的熔点只有29.76度,所以只要你足够长时间的把它放在手上,那么它就会熔化成液体。单单这样就很好玩了,可是它还具备其他特性。比如,它会“袭击”其他金属,比如铝。用这种液体金属,只要一滴就可以把可口可乐的罐子给软化,从而你用拇指轻轻一按就可以把罐子给刺穿。镓侵入铝的结构,破坏其完整性,从而使这种可口可乐铝罐感觉起来就像锡纸而不像金属了。另外一个有趣的实验叫做“跳动的心脏”,在这个实验中,这种金属被构造成外星人的形状。当溶解在硫酸或者重铬酸盐中时,镓看起来就像一个有机的会跳动的心脏,因为镓中含有的硫酸盐加大了其表面张力。


来源:龙腾网

Use magic tools Report

Rank: 3Rank: 3

Post time 2013-5-16 17:19:16 |Display all floors
好贵的金属 价格大概在1670元/千克~~
Chinese Paintings: http://www.artisoo.com/chinese-painting-c-218.html

Use magic tools Report

You can't reply post until you log in Log in | register

BACK TO THE TOP
Contact us:Tel: (86)010-84883548, Email: blog@chinadaily.com.cn
Blog announcement:| We reserve the right, and you authorize us, to use content, including words, photos and videos, which you provide to our blog
platform, for non-profit purposes on China Daily media, comprising newspaper, website, iPad and other social media accounts.