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Thakur Divyansh Kumar Yugal Kumar Arvind Singh Pradeep Kumar 《Wireless Personal Communications》2019,104(1):471-489
Wireless Personal Communications - Data security is currently become a serious concern in wireless communication system for both the users and providers. Without a secure medium, the data... 相似文献
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Raju Kumar Divyansh Khurana Ashish kumar Satyendra Singh 《Ceramics International》2018,44(17):20845-20850
We report the electrocaloric (EC) effect investigation on lead-free 0.94(K0.5Na0.5)NbO3-0.06SrMnO3 nanocrystalline ceramics by an indirect thermodynamic method using Maxwell's relations. The maximum value of the negative EC effect () was observed at 459?K near the transition temperature at the field of 50?kV/cm. The corresponding EC responsivity was calculated to be under 50?kV/cm at 459?K whereas the coefficient of performance (COP) and recoverable energy density () were found to be 1.03 and , respectively under 50?kV/cm at 443?K. The observed values of negative EC effect, and EC responsivity are larger than any other lead-free ferroelectric ceramics with good COP and value. The results are interesting to improve the cooling efficiency and energy storage for device application. 相似文献
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