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Your search keyword '"Zhang, Ganghua"' showing total 27 results
Start Over Author "Zhang, Ganghua" Publisher elsevier bv
27 results on '"Zhang, Ganghua"'

2. Preparation and photoluminescence properties of high thermal stability Sr3Ga2Sn1.5Si2.5O14:Eu3+ red phosphors for high-power light-emitting diodes application

Author

Guo, Huanyi, primary, Zheng, Yuling, additional, Shi, Tongna, additional, Qin, Zhiyu, additional, Zhao, Guoying, additional, Liu, Yufeng, additional, Zhang, Ganghua, additional, Wu, Dehua, additional, Dong, Langping, additional, Hou, Jingshan, additional, and Fang, Yongzheng, additional

Published
2023
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14. Electrocaloric effect in Pb-free Sr-doped BaTi 0.9 Sn 0.1 O 3 ceramics

Author

Zeng Tao, Zhang Ganghua, Linhai Duan, Jianwu Cao, and Shuang Qi

Subjects
010302 applied physics, Materials science, Condensed matter physics, Mechanical Engineering, Doping, Analytical chemistry, Refrigeration, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Mechanics of Materials, visual_art, 0103 physical sciences, visual_art.visual_art_medium, Electrocaloric effect, Curie temperature, General Materials Science, Ceramic, 0210 nano-technology
Abstract

Perovskite-type Ba 1− x Sr x Ti 0.9 Sn 0.1 O 3 ( x = 0, 0.06, 0.07, and 0.08) oxides were prepared by conventional solid-state synthesis, and their electrocaloric effect was investigated, revealing that doping by Sr reduces the Curie temperature to ambient values. The largest electrocaloric strength of 0.31 K mm kV −1 was obtained for x = 0.06 at 47 °C, significantly exceeding values displayed by other lead-free ceramics and implying that novel Sr-doped Ba 1− x Sr x Ti 0.9 Sn 0.1 O 3 ceramics are promising materials for ecofriendly refrigeration applications.

Published
2017

18. Effects of different tissue loads on high power ultrasonic surgery scalpel

Author

Zhou Zhaoying, Zhang Ganghua, and Chen Ying

Subjects
medicine.medical_specialty, Materials science, Admittance, Acoustics and Ultrasonics, Swine, Ultrasonic Therapy, Acoustics, Dermatologic Surgical Procedures, Biophysics, Bone tissue, medicine, Animals, Humans, Radiology, Nuclear Medicine and imaging, Femur, Sensitivity (control systems), Least-Squares Analysis, Muscle, Skeletal, Radiological and Ultrasound Technology, Signal Processing, Computer-Assisted, Radius, Spine, Biomechanical Phenomena, Surgery, Power (physics), Cartilage, surgical procedures, operative, medicine.anatomical_structure, Adipose Tissue, Liver, Models, Animal, Reflection (physics), Equivalent circuit, Ultrasonic sensor
Abstract

The objective of this study is to investigate the influence of various tissue loads on the working characteristic of the ultrasonic scalpel, including working frequency, input admittance and reflection factor. Ex vivo animal experiments are carried out and relevant discussions of experimental results are provided. Admittance measurement results show that different tissue loads have different effects on a scalpel's working ability. Soft tissue makes the working frequency decrease and bone tissue makes it increase. Radius of admittance circles and reflection factor are also different. Equivalent circuit model is found and with a least-square parameter identification method, input admittance of ultrasonic scalpel with different tissue loads is solved. Results show that admittance circle radius is determined by the value of R1. Changes in L1 and C1 contribute to the shift of working frequency. This study will help decrease the sensitivity of ultrasonic scalpel to loads and greatly increase surgery efficiency.

Published
2006

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