فهرست

تهیه و مشخصه یابی نانوکامپوزیت نانولوله کربنی- تیتانات باریم/سیلیکا به روش سل- ژل و بررسی خواص حفاظتی آن در برابر امواج الکترومغناطیس

نشریه: زمستان ۱۳۹۷ - مقاله 5   صفحات :  335 تا 346



کد مقاله:
nm-536

مولفین:
محمدرضا توحیدی فر: دانشگاه زنجان - دانشکده مهندسی، گروه مهندسی مواد
رسول ملک فر: دانشگاه تربیت مدرس - فیزیک


چکیده مقاله:

در این پژوهش روش سل-ژل جهت سنتز نانوکامپوزیت نانولوله کربنی- تیتانات باریم/سیلیکا به کار گرفته شد. فرآیند سنتز با استفاده از مقادیر مختلفMWCNT 2، 4، 6 و 8 درصد وزنی انجام شد. میکروسکوپ الکترونی روبشی SEM، تفرق اشعه ایکس XRD، طیف سنجی مادون قرمز تبدیل فوریه FTIR، آنالیز حرارتی همزمان STA، رفتار دی الکتریک و خواص حفاظتی تداخلی امواج الکترومغناطیس EMI SE جهت مشخصه یابی و بررسی خواص نانوکامپوزیتها مورد استفاده قرار گرفتند. نتایج نشان داد که EMI SE و نفوذپذیری مختلط نانوکامپوزیت های سنتز شده در این پژوهش نسبت به نمونه مشابه که از روش های دیگر تهیه شده، بهبود یافته که ناشی از اختلاط و توزیع همگن نانولوله ها در بین ذرات است. همچنین مشخص شد که نمونه سنتز شده با 8 درصد وزنی MWCNT که در C°750 سینتر شده دارای اندازه دانه حدود 97 نانومتر می باشد.


Article's English abstract:

This paper investigated the preparation of a multi-walled carbon nanotube MWCNT-barium titanate/silica nanocomposite using a sol-gel technique. The synthesis was conducted using different amounts of MWCNT 2, 4, 6 and 8 wt. Scanning electron microscopy SEM, X-ray diffraction XRD, Fourier transform infrared spectroscopy FTIR, Simultaneous thermal analysis STA, Dielectric behavior and Electromagnetic interference shielding effectiveness EMI SE were used to characterize the as-synthesized specimens. It was found that the sol-gel process provided the nanocomposite with higher EMI SE value compared to the same nanocomposite prepared by the other methods. This is resulted due to a good mixing and homogeneous distribution of MWCNTs and other composite constituents. Results also indicated that the grain size of 98 nm for the nanocomposite prepared with 8 wt MWCNT and sintered at 750°C was concluded.


کلید واژگان:
نانوکامپوزیت، سل- ژل، نانولوله کربنی، خواص دی الکتریک

English Keywords:
Nanocomposite; Sol-gel; Carbon nanotube; Dielectric properties

منابع:
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English References:
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