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Preparation and characterization of PTFE coating in new polymer quartz piezoelectric crystal sensor for testing liquor products |
Gu Yu (谷宇)a, Li Qiang (李强)b |
a Department of Intelligence Science and Technology, School of Automation and Electrical Engineering, University of Science & Technology Beijing, Beijing 100083, China; b Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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Abstract A new method was developed based on the electron beam vacuum dispersion (EBVD) technology to prepare the PTFE polymer coating of the new polymer quartz piezoelectric crystal sensor for testing liquor products. The new method was applied in the new EBVD equipment which we designed. A real-time system monitoring the polymer coating's thickness was designed for the new EBVD equipment according to the quartz crystal microbalance (QCM) principle, playing an important role in preparing stable and uniform PTFE polymer coatings of the same thickness. 30 pieces of PTFE polymer coatings on the surface of the quartz crystal basis were prepared with the PTFE polymer ultrafine powder (purity ≥ 99.99%) as the starting material. We obtained 30 pieces of new PTFE polymer sensors. By using scanning electron microscopy (SEM), the structure of the PTFE polymer coating's column clusters was studied. One sample from the 30 pieces of new PTFE polymer sensors was analysed by SEM in four scales, i.e., 400×, 1000×, 10000×, and 25000×. It was shown that under the condition of high bias voltage and low bias current, uniformly PTFE polymer coating could be achieved, which indicates that the new EBVD equipment is suitable for mass production of stable and uniform polymer coating.
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Received: 17 December 2014
Revised: 20 January 2015
Accepted manuscript online:
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PACS:
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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81.15.Rs
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(Spray coating techniques)
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68.55.-a
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(Thin film structure and morphology)
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Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2013AA030901). |
Corresponding Authors:
Gu Yu
E-mail: guyu@ustb.edu.cn
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Cite this article:
Gu Yu (谷宇), Li Qiang (李强) Preparation and characterization of PTFE coating in new polymer quartz piezoelectric crystal sensor for testing liquor products 2015 Chin. Phys. B 24 078106
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