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引用次数: 6
摘要
在无表面活性剂和表面活性剂存在的情况下，采用水热法制备了Cu 0.1Zn0.9 Mn2O4纳米粉体。采用XRD、SEM和TEM对样品进行了表征。所有样品均显示尖晶石晶体结构，其晶粒大小取决于制备方法，在17-89 n m范围内。电导率作为频率和温度的函数已被研究。电导率结果表明，所研究的样品的导电行为与半导体相似，可以用跳变机制来解释，跳变机制是指尖晶石晶格中位于八面体位置的mn +和mn +1离子之间通过电子交换进行导电。用VSM研究了材料的室温磁性能。研究了γ辐射对材料性能的影响。每一种表面活性剂的制备方法和γ-辐照过程都影响其粒度、形貌、磁性和电学性能。
Influences of γ–Radiation and Surfactants on Electrical and Magnetic Properties of Cu 0.1 Zn 0.9 Mn 2 O 4 Nanoparticles
Nanosized Cu 0.1Zn0.9 Mn2O4 were prepared by hydrothermal method in absence and presence of surfactants. The samples were characterized using XRD, SEM and TEM. A ll samp les showed spinel crystal structure with crystallite sizes depending on the preparation method and lay in the range of 17-89 n m. Electrical conductivity as a function of frequency and temperature has been studied. The conductivity results showed that all investigated samples behave like semiconductors and could be explained by hopping mechanism in which the conduction occurres via electron exchange amongst M n+ and M n+1 ions situated on octahedral sites in spinel lattice. Room temperature magnetic properties using VSM were studied. Effect of γ-radiation on the studied properties is investigated. Each of particle size, mo rphology, magnetic and electrical properties is affected with each of the type of surfactant used in the preparation method and γ- irradiat ion process.
期刊介绍：
The world of mobile communications is not a trend, but a phenomenon. IJMC, a fully refereed journal, publishes articles that present current practice and theory of mobile communications, mobile technology, and mobile commerce applications. Topics covered include Integrated mobile marketing communications Wireless advertising/CRM Telematics, pervasive computing Incoming/outgoing wireless links Location management Diffusion, security, efficacy, interaction/integration Metric mobile business enterprises PDAs in services delivery M-/u-business models, m-/u-commerce Digital office, groupware, roomware Mobile ad hoc networking, wireless information assurance Nomadic/portable communications Cross-cultural mobile communications Teaching mobile communication applications Mobile/handheld devices in the classroom, tele-learning.
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