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Your search keyword '"Zhu, Chunling"' showing total 8 results
Start Over Author "Zhu, Chunling" Publisher iop publishing
8 results on '"Zhu, Chunling"'

5. Nitrogen and Boron Co-Doped Carbon Nanotubes Embedded with Nickel Nanoparticles as Highly Efficient Electromagnetic Wave Absorbing Materials

Author

Xin Zhu, Yujin Chen, Lihong Qi, Haoran Yuan, Yan-Feng Liu, Chunyan Li, Feng Yan, and Zhu Chunling

Subjects
Materials science, General Physics and Astronomy, chemistry.chemical_element, Nanoparticle, Carbon nanotube, Electromagnetic radiation, Nitrogen, law.invention, Nickel, chemistry, Chemical engineering, law, Boron, Co doped
Abstract

Due to the limitations of impedance matching and attenuation matching, carbon nanotubes (CNTs) employed alone have a weak capacity to attenuate electromagnetic wave (EMW) energy. In this work, B and N co-doped CNTs with embedded Ni nanoparticles (Ni@BNCNTs) are fabricated via an in situ doping method. Compared with a sample without B doping, Ni@BNCNTs demonstrate a superior EMW absorption performance, with all minimum reflection loss values below −20 dB, even at a matching thickness of 1.5 mm. The experimental and theoretical calculation results demonstrate that B doping increases conduction and polarization relaxation losses, as well as the impedance matching characteristic, which is responsible for the enhanced EMW absorption performance of Ni@BNCNTs.

Published
2021

6. 3D printing and dynamic modeling of a polymer-based bimodal piezoelectric motor.

Author

Li, Xiaoniu, Yu, De, Cao, Teng, Wen, Zhiyi, Lu, Chunyao, Liu, Wei, Zhu, Chunling, and Wu, Dawei

Abstract

Owing to characteristics of single-step fabrication and rapid prototyping, 3D printing have potential applications in processing piezoelectric motors with complex structures. In this paper, a 3D printed resin-based bimodal piezoelectric motor is proposed. Four slots of the motor are designed to reduce the influence of large damping caused by polymer's viscoelastic and enhance mechanical properties. Considering the viscoelasticity and internal structure of the stator, a dynamic model based on the proposed motor is developed. Furthermore, parameters of these slots are optimized using the Taguchi method. Prototypes are fabricated and experimentally investigated. The results demonstrate that the first longitudinal mode and the second bending mode are 17 765 Hz and 18 006 Hz respectively, which are consistent with the analytical model results. Under the voltage of 300 Vpp, the maximum no-load speed and maximum driving load of the slotted motor are 200 r min−1 and 20 g with a speed of 6 r min−1, respectively. Compared with the motor without slots, the speed and load capacity are increased by 25% and 33%. Therefore, the motor with slots exhibits better mechanical output performance. [ABSTRACT FROM AUTHOR]

Published
2021
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