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

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Ashraf Sayed Abdelhaleem

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TextLanguage: 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	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	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

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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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