A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method
This study developed an energy-enhanced (ee)-micro-electric discharge machining (EDM) system for preparing nano-tungsten (nano-W) colloids. This system enables spark discharge using tungsten wires immersed in deionized water, to produce nano-W colloids. Compared with the chemical preparation method,...
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MDPI AG
2022-11-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/11/2009 |
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| author | Chaur-Yang Chang Kuo-Hsiung Tseng Jui-Tsun Chang Meng-Yun Chung Zih-Yuan Lin |
| author_facet | Chaur-Yang Chang Kuo-Hsiung Tseng Jui-Tsun Chang Meng-Yun Chung Zih-Yuan Lin |
| author_sort | Chaur-Yang Chang |
| collection | DOAJ |
| description | This study developed an energy-enhanced (ee)-micro-electric discharge machining (EDM) system for preparing nano-tungsten (nano-W) colloids. This system enables spark discharge using tungsten wires immersed in deionized water, to produce nano-W colloids. Compared with the chemical preparation method, the processing environment for preparing colloids in this study prevented nanoparticle escape. Among the nano-W colloids prepared using the ee-micro-EDM system and an industrial EDM system, the colloid prepared by the ee-micro-EDM system exhibited a more favorable absorbance, suspensibility, and particle size. The colloid prepared by the ee-micro-EDM system with a pulse on time and off time of 10–10 μs had an absorbance of 0.277 at a wavelength of 315 nm, ζ potential of −64.9 mV, and an average particle size of 164.9 nm. Transmission electron microscope imaging revealed a minimum particle size of approximately 11 nm, and the X-ray diffractometer spectrum verified that the colloid contained only <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">W</mi><mrow><mn>2.00</mn></mrow></msub></mrow></semantics></math></inline-formula> and W nanoparticles. Relative to industrial EDM applications for nano-W colloid preparation, the ee-micro-EDM system boasts a lower cost and smaller size, and produces nano-W colloids with superior performance. These advantages contribute to the competitiveness of the electrical spark discharge method in the preparation of high-quality nano-W colloids. |
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| id | doaj.art-bc68c51c16194767b6872ffdc7d8c62f |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T18:09:13Z |
| publishDate | 2022-11-01 |
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| series | Micromachines |
| spelling | doaj.art-bc68c51c16194767b6872ffdc7d8c62f2023-11-24T09:16:23ZengMDPI AGMicromachines2072-666X2022-11-011311200910.3390/mi13112009A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge MethodChaur-Yang Chang0Kuo-Hsiung Tseng1Jui-Tsun Chang2Meng-Yun Chung3Zih-Yuan Lin4Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanThis study developed an energy-enhanced (ee)-micro-electric discharge machining (EDM) system for preparing nano-tungsten (nano-W) colloids. This system enables spark discharge using tungsten wires immersed in deionized water, to produce nano-W colloids. Compared with the chemical preparation method, the processing environment for preparing colloids in this study prevented nanoparticle escape. Among the nano-W colloids prepared using the ee-micro-EDM system and an industrial EDM system, the colloid prepared by the ee-micro-EDM system exhibited a more favorable absorbance, suspensibility, and particle size. The colloid prepared by the ee-micro-EDM system with a pulse on time and off time of 10–10 μs had an absorbance of 0.277 at a wavelength of 315 nm, ζ potential of −64.9 mV, and an average particle size of 164.9 nm. Transmission electron microscope imaging revealed a minimum particle size of approximately 11 nm, and the X-ray diffractometer spectrum verified that the colloid contained only <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">W</mi><mrow><mn>2.00</mn></mrow></msub></mrow></semantics></math></inline-formula> and W nanoparticles. Relative to industrial EDM applications for nano-W colloid preparation, the ee-micro-EDM system boasts a lower cost and smaller size, and produces nano-W colloids with superior performance. These advantages contribute to the competitiveness of the electrical spark discharge method in the preparation of high-quality nano-W colloids.https://www.mdpi.com/2072-666X/13/11/2009electrical spark discharge methodnano-W colloidelectrical discharge machininginterelectrode gap |
| spellingShingle | Chaur-Yang Chang Kuo-Hsiung Tseng Jui-Tsun Chang Meng-Yun Chung Zih-Yuan Lin A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method Micromachines electrical spark discharge method nano-W colloid electrical discharge machining interelectrode gap |
| title | A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method |
| title_full | A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method |
| title_fullStr | A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method |
| title_full_unstemmed | A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method |
| title_short | A Study of Nano-Tungsten Colloid Preparing by the Electrical Spark Discharge Method |
| title_sort | study of nano tungsten colloid preparing by the electrical spark discharge method |
| topic | electrical spark discharge method nano-W colloid electrical discharge machining interelectrode gap |
| url | https://www.mdpi.com/2072-666X/13/11/2009 |
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