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معلومات ثقافية، معلومات علمية

أخف مادة في العالم

31 يناير 2013

قام فريق من المهندسين الأميركيين باستحضار ما قالوا انه أخف مادة في العالم.
ويقول الباحثون: إن المادة أخف بمائة مرة من مادة ستيروفوم، ولها قدرة غير عادية على امتصاص الطاقة.
ويمكن أن تستخدم المادة في الجيل القادم من البطاريات ولوحات امتصاص الصدمات. وقد أجري البحث في مختبرات جامعة كاليفورنيا ومعهد كاليفورنيا للتكنولوجيا، ونشر في العدد الأخير من مجلة «ساينس» العلمية.
تبلغ كثافة المادة الجديدة 0.9 مليغرام لكل سنتيمتر مكعب، بينما تبلغ كثافة «ايروجيل»، وهي أخف مادة صلبة معروفة حتى الآن 1.0 ميليغرام لكل سنتيمتر مكعب.
يذكر ان للمواد الخفيفة كالايروجيل والرغوة المعدنية تركيبا خلويا عشوائيا، مما يجعلها أقل قساوة وأكثر قوة وقدرة على امتصاص الطاقة، وقدرة على التوصيل الحراري من معظم المواد الأولية الداخلة في تركيبها. ويرى المهندسون القائمون على تحضير المادة الجديدة أن من بين الاستخدامات العملية المستقبلية لها العزل الحراري والصوتي وامتصاص الطاقة والذبذبات.
¶ بي بي سي ¶

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