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Effect of laser radiation on carbon nano tube composite used in microwave shielding / Ashraf Sayed Abdelhaleem ; Supervised Gamal Abdelnaser , Anke Klingner , Adel Alnozahy

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Ashraf Sayed Abdelhaleem , 2015Description: 130 P. ; 25cmOther title:
  • تأثير أشعة الليزر على مركبات أسود الكربون النانومترى المستخدمة فى عزل الموجات الدقيقة [Added title page title]
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Dissertation note: Thesis (Ph.D.) - Cairo University - National Institute of Laser Enhanced Sciences - Department of Laser Application in Physics Summary: In this thesis the effect of laser radiation on PVA / CNT composite used in microwave shielding. Both dielectric constant and ac conductivity followed the power law of percolation theory. The EMI shielding measurements appears that the main contribution of these composites to effective EMI shielding was due to absorption. The percolation threshold changed from 0.019 to 0.029 by laser beam energies up to 200 joules. The skin depth decreases with increasing of CNT ( to 0.04 V fraction) by approximately 40 times its initial value. The maximum value of the total shield effectiveness is obtained at ( 35Ghz ) for the irradiated composite loaded with 0.038
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.24.06.Ph.D.2015.As.E (Browse shelf(Opens below)) Not for loan 01010110068987000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.24.06.Ph.D.2015.As.E (Browse shelf(Opens below)) 68987.CD Not for loan 01020110068987000

Thesis (Ph.D.) - Cairo University - National Institute of Laser Enhanced Sciences - Department of Laser Application in Physics

In this thesis the effect of laser radiation on PVA / CNT composite used in microwave shielding. Both dielectric constant and ac conductivity followed the power law of percolation theory. The EMI shielding measurements appears that the main contribution of these composites to effective EMI shielding was due to absorption. The percolation threshold changed from 0.019 to 0.029 by laser beam energies up to 200 joules. The skin depth decreases with increasing of CNT ( to 0.04 V fraction) by approximately 40 times its initial value. The maximum value of the total shield effectiveness is obtained at ( 35Ghz ) for the irradiated composite loaded with 0.038

Issued also as CD

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