Effect of pH on nanocrystalline Co-ferrite prepared using urea and thiourea fuels by combination of sol- gel auto combustion and ultrasonic irradiation methods
Author(s):
Abstract:
The aim of this study is to evaluate the influence of pH on the synthesis of nanocrystallines cobalt ferrite by combination of sol- gel auto combustion and ultrasonic irradiation methods. Two different fuels, urea and thiourea, along with metal nitrates (oxidant) were used to prepare CoFe2O4 powders. The morphology of the resulting powders was investigated. The powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Phase pure spinel cobalt ferrite powder was obtained at pH values 6 and 7 after the calcinations at 750˚C when urea was used as the fuel; however, the samples obtained using thiourea fuel contained impurities. The average crystalline size was 21 and 37 nm, respectively, for the samples containing urea and thiourea.
Keywords:
Nanocrystalline , CoFe2O4 , Sol , gel auto , combustion , Fuel , Ultrasonic irradiation , XRD , SEM
Language:
English
Published:
International Journal of Nano Dimension, Volume:3 Issue: 2, Autumn 2012
Pages:
141 to 147
magiran.com/p1033661
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!