From binary to ternary and back to binary: Transition of electromagnetic wave shielding to absorption among MAB phase Ni 3ZnB 2 and corresponding binary borides Ni n+1B n( n= 1, 3)
Chengwen Wu, Fan Zhang, Qin Zhi, Bo Song, Yongqiang Chen, Hailong Wang, Rui Zhang, Hongxia Li, Bingbing Fan
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引用次数: 0
Abstract
Due to the chemical inertness of nickel and boron, the preparation of nickel borides and corresponding layered ternary transition metal borides Ni3ZnB2 (MAB phase) has always required high-temperature and/or high-pressure conditions. Yet, an innovative and efficient approach to prepare Ni3ZnB2 at only 600 °C and without applied pressure is presented in this study. It is discovered that by simply adjusting the temperature, a phase transition from Ni3ZnB2 to Ni4B3 with a layered structure could be induced. This transition between binary-component and ternary-component brings about significant variation of electromagnetic wave (EMW) shielding/absorption performance of prepared borides. For instance, Ni2B is of good EMW shielding performance (42.54 dB in X band) and Ni3ZnB2 is of weak EMW shielding (13.43 dB in X band); Ni3ZnB2 has poor EMW absorption performance (-5 dB) while Ni4B3 has excellent EMW absorption performance (-45.19 dB) at a thickness of 2.7 mm with effective absorption bandwidth (10.4 GHz).
期刊介绍:
Journal of Advanced Ceramics is a single-blind peer-reviewed, open access international journal published on behalf of the State Key Laboratory of New Ceramics and Fine Processing (Tsinghua University, China) and the Advanced Ceramics Division of the Chinese Ceramic Society.
Journal of Advanced Ceramics provides a forum for publishing original research papers, rapid communications, and commissioned reviews relating to advanced ceramic materials in the forms of particulates, dense or porous bodies, thin/thick films or coatings and laminated, graded and composite structures.