نتایج جستجو برای: insulation properties

تعداد نتایج: 876888  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی نساجی 1388

قیرهای استحصالی از نفت و یا قیر طبیعی که سالیان دراز عمدتاً بعنوان ماده چسباننده در ساخت جاده ها و با دیگر مصارف عایق-کاری و پوششی بکار می رود، هیچگاه از یکسری خواص فیزیکی و مکانیکی کاملاً رضایت بخش برخوردار نبوده و با توجه به خواص فیزیکی محدود، از قابلیت کاربردی محدود و زمان سرویس دهی مشخص برخوردار می باشد. از این رو محققان همواره تلاش داشتند که بنحوی خواص این سنگین ترین برش نفتی را در جهت مطلوب...

Iran is considered as one of the most energy-consuming countries in the world, and because of the abundant resources in Iran, energy is so cheap. In this study, by focusing on the residential sector as the most consumable sector, and electricity as the most consumable energy in this sector, it has been tried to investigate, and simulate related approved methods in the world, and the results of ...

2005

Parylene N is a primary dielectric, exhibiting a very low dissipation factor, high dielectric strength, and a dielectric constant invariant with frequency. This form has the highest penetrating power of all the Parylenes. Parylene C has a useful combination of electrical and physical properties plus a very low permeability to moisture and other corrosive gases. Along with its ability to provide...

 Insufficient electrical endurance of equipment and insulation failure against overvoltage is one of the most effective reasons for failure the power line. Lightening, switching or other disruptive parameters can cause line outage or distribution substation failure. There are different devices used to improve the safety, reliability, and power quality of the system. Surge arresters are one of t...

Journal: :Journal of neuroscience methods 1995
G E Loeb R A Peck J Martyniuk

The performance of metal microelectrodes for stimulating and recording neuronal action potentials depends on precise control of their geometrical, electrical and mechanical properties. We describe a combination of materials whose properties approach fundamental physical limitations on achievable performance and reproducible fabrication techniques that provide probes with very small dimensions. ...

2018

LIGHTWEIGHT CONCRETE May consist of lightweight aggregates are used in ordinary concrete of coarse aggregate and sand, clay, foamed slag, clinker, crushed stone, aggregates of organic and inorganic. It used in different common shapes such as light weight aggregate concrete [1], concrete without fine [2] or concrete with bubble [3]. It is replaced by normal concrete in several applications becau...

2012
Jae-Jun Park

Copyright 2012 KIEEME. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Effect of Silica Particle Size on the Mechanical...

2015
Burcu Basar Adrienne E Campbell-Washburn Toby Rogers Merdim Sonmez Anthony Z Faranesh Kanishka Ratnayaka Robert J Lederman Ozgur Kocaturk

Background Conductive guidewires and intravascular catheters are at risk of RF-induced heating under MRI [1]. Heating is found predominantly at the tip of conductive wires [2], and is modulated by wire diameter, length and insulation thickness [3]. Non-conductive materials, such as polymer, impart unsatisfactory mechanical properties on guidewires in terms of flexibility, stiffness, and torquab...

2018

LIGHTWEIGHT CONCRETE May consist of lightweight aggregates are used in ordinary concrete of coarse aggregate and sand, clay, foamed slag, clinker, crushed stone, aggregates of organic and inorganic. It used in different common shapes such as light weight aggregate concrete [1], concrete without fine [2] or concrete with bubble [3]. It is replaced by normal concrete in several applications becau...

2015
Youyuan Wang Kun Xiao Bijun Chen Yuanlong Li Issouf Fofana

This paper studied the impact of moisture on the correlated characteristics of the condenser bushings oil-paper insulation system. The oil-impregnated paper samples underwent accelerated thermal aging at 130 ̋C after preparation at different initial moisture contents (1%, 3%, 5% and 7%). All the samples were extracted periodically for the measurement of the moisture content, the degree of polym...

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