شماره مدرك :
5971
شماره راهنما :
5580
پديد آورنده :
وزيري، عليرضا
عنوان :

بررسي جذب امواج الكترومغناطيسي در منسوجات پوشش داده شده با ذرات كربن بلك، نانو لوله كربن و پودر فلزي

مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي نساجي و علوم الياف
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي نساجي
سال دفاع :
1389
صفحه شمار :
يازده،101ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
مجيد مرتضوي، حسين حسني
استاد مشاور :
ابوالقاسم زيد آبادي نژاد
توصيفگر ها :
مواد جاذب رادار , نانو لوله كربن
تاريخ نمايه سازي :
7/3/90
استاد داور :
حسين توانايي، امير برجي
دانشكده :
مهندسي نساجي
كد ايرانداك :
ID5580
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
An investigation on Electromagnetic Waves Absorption by Textile Fabrics Coated with Carbon Black Carbon Nanotube and Metal Powders Alireza Vaziria vaziri@tx iut ac ir Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors S M Mortazavi mortaza@cc iut ac ir H Hasani h hassani@cc iut ac ir Abstract Protection against electromagnetic waves can be considered in two aspects In terms of health and safety protecting the body against electromagnetic waves is a concern of modern medical issues and In military and defense science immunity against radar and infrared detection equipments has a great importance in the battle fields In the military applications electrooptic and electromagnetic features of the cloths made of special textile structures and certain bers play an important role in producing textile characterized with high ability of camou age This means not allowing enemy to precisely determine the moving and mute targets using available radar or any other electro optics sensors In this research various methods for camouflage against radar equipments have been introduced Based on this idea the radar absorbing mechanism has been studied with emphasis on the single layer structure mechanism Salisbury screen with a resistive sheet The Salisbury screen is a resonant absorber created by placing a lossy sheet on a low dielectric constant spacer in front of a metal plate forming one layer structure Fabric structure of the resistive sheet was accurately chosen and coated with lossy material In fact many absorbing materials are manufactured with lossy materials providing the loss mechanism and the dissipation of energy takes place by the conversion of electromagnetic energy into heat Lossy mechanism may be carbon or dielectric materials with complex indices of refraction Lab measurements have been done to get optimum formulas and optimum fabrics structures for high radar absorption performance Various textiles including plain woven fabrics and spacer fabrics was utilized to study the construction of X and Ku band radar absorbent coating Carbon black and carbon nano tube as conductive materials were used for coating of fabrics In addition the effect of metal powders such as copper and aluminum on the absorber performance was studied In this research after printing experiments various formulas of lossy materials which had suitable printing properties and more conductivity have been chosen and studied as material type parameter Printing techniques was used to coat the samples on three types of plain woven fabrics in the radar absorbent structure The e ect of parameters such as lossy material type lossy material thickness spacer fabric thickness and coated fabric material on the electromagnetic waves absorption at bandwidth 8 18 GHz was investigated Taguchi method was used to optimize costs and the number of radar absorption experiments as well as statistical and systematic analysis of the results From analyze of variance the findings reveal that the material type and spacer fabric thickness are two parameters which statistically have significant influence on the results of experiments As a result samples have ability to absorb 99 97 percent of electromagnetic waves at 10 GHz frequencies In addition at 8 15 GHz bandwidth the samples able to absorb 90 percent of electromagnetic waves and at bandwidth 9 3 12 5 GHz the samples were able to absorb 97 percent of the waves Keywords radar absorbent material electromagnetic wave carbon black carbon nanotube coating
استاد راهنما :
مجيد مرتضوي، حسين حسني
استاد مشاور :
ابوالقاسم زيد آبادي نژاد
استاد داور :
حسين توانايي، امير برجي
لينک به اين مدرک :

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