Properties of lightweight fibrous structures made by a novel foam forming technique

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Properties of Superhydrophobic Surfaces made by RESS Technique

The properties of superhydrophobic [1, 2] surfaces produced by Rapid Expansion of Supercritical Solvent (RESS) were studied. These surfaces were produced on paper surfaces by spraying alkyl ketene dimer (AKD, a wax commonly used in paper industry) dissolved in SC-CO2 through a nozzle onto a moving paper substrate in ambient conditions [3, 4]. Pressure and temperature of the SC-CO2 were optimize...

A Novel Method to Decrease Micro-residual Stresses of Fibrous Composites by Adding Carbon Nanotube

In this research, a novel method to decrease micro-residual stresses of fibrous composites by adding carbon nanotubes (CNTs) is proposed in detail. The negative coefficient of thermal expansion and the high young’s modulus of CNTs can be utilized to counterbalance the process induced residual stresses in composites. To this end, first, the effects of adding CNTs to the matrix of fibrous composi...

Influence of Milled Waste Glass to Clay Ceramic Foam Properties Made by Direct Foaming Route

Studies on Properties of AgAl2O3 Nanocomposite Synthesized by Solution Combustion Technique Under Novel Condition

AgAl2O3 nanocomposite were synthesized by solution combustion Technique using ammonium carbonate as a new fuel under simultaneous combustion of alumina and silver particles condition. Samples prepared with different amount of silver, were characterized by XRD, BET, SEM and optical Absorption measurements. XRD analysis was used to determine the change in phase and size of the synthesized n...