期刊
NANO LETTERS
卷 20, 期 7, 页码 5097-5105出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c01304
关键词
vertically oriented graphene; plasma enhanced chemical vapor deposition; thermal conductivity; ultrasonic transducer; heat-dissipation efficiency
类别
资金
- National Basic Research Program of China [2016YFA0200103, 2018YFA0703700]
- National Natural Science Foundation of China [51520105003, 51432002, 51991344, 51925201]
- Beijing Municipal Natural Science Foundation [Z181100004818002, Z191100000819004]
Ultrasonic transducers with large output power have attracted extensive attentions due to their widespread applications in sonar, acoustic levitation, ultrasonic focusing, and so forth. However, the traditional transducer has almost no heat-dissipation capability itself, strictly relying on the assistant coolant system. Introducing high-performance heat-dissipation component is thus highly necessary. Herein, an embedded porcelain radiator component was designed by combining the excellent thermal conductivity of vertically oriented graphene (VG) with the outstanding heat-dissipation characteristics of thermosensitive ceramics, and a new-type transducer with an embedded VG/ceramic-hybrid radiator was constructed to show high heat-dissipation efficiency (up to similar to 5 degrees C/min). Remarkably, prominent heat-dissipation effectiveness (temperature decline of similar to 12 degrees C), enhanced amplitude and vibration uniformity were also achieved for the new-type transducer along with stabilized operating states. This research should pave ways for extending the applications of VG/ceramic hybrids to heat-dissipation scenarios and provide newfangled thoughts for the performance upgrade of multitudinous high-power devices.
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