Megahertz magneto-dielectric properties of nanosized NiZnCo ferrite from CTAB-assisted hydrothermal process
A simple hydrothermal route with cetyltrimethyl ammonium bromide (CTAB) was proposed for directly synthesizing single-crystalline NiZn ferrite at 160 ℃.X-ray diffraction patterns and micrographs indicate that products consist of spinel ferrite nanogranulars.The dielectric constant of NiZnCo ferrite is about 11 and the imaginary part of complex permittivity is 1.3.The saturation magnetization (Ms) of NiZn ferrite improves from 0.041 to 0.074 A·m2/g for Ni0.49Zn0.5Co0.01Fe1.98O4.The dielectric contant of NiZn ferrite increases from 7 to 11 with a cobalt stoichiometry of 0.01.The real part μ′ of complex permeability for NiZnCo ferrite reaches 3 at 1 GHz.The imaginary part μ″ of NiZnCo ferrite has a value higher than 1.2 within 0.7-3.0 GHz.Through the incorporation of the magnetic fillers,the low dielectric constant of the composites may meet the requirements of impedance matching to achieve the maximal absorption of the electromagnetic energy in megahertz frequency range.
NiZnCo ferrite hydrothermal permeability permittivity saturation magnetization
SHEN Xiang WANG Yan-xin YANG Xiang XIA Yong ZHUANG Jian-feng TANG Pei-duo
Engineering Research Center of Nano-Geomaterials of Ministry of Education,China University of Geosci School of Environmental Studies,China University of Geosciences,Wuhan 430074,China Faculty of Material Science and Chemical Engineering,China University of Geosciences,Wuhan 430074,Ch
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
1588-1592
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）