C12 Polishing Phenomena of Copper Plate using Photocatalyst and Fluorescent Substance excited by Ultraviolet Ray : Study of Ultraviolet-Ray Aided Machining(Abrasive finishing technology)
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概要
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Absorption of the light energy of ultraviolet ray by fluorescent substances, such as high molecular-weight polymers, will result in excitation. If such substances react with the processing material on the atomic order in the excited condition, this reaction may be available for fine processing. Thus, processing on the sub-nanometer level may be realized by the phenomena of luminescence and photocatalysis. The processing principle has been deduced with reference to the abrasion results observed by dipping copper for a fixed time in a mixed solution of a substance that fluoresced on ultraviolet-ray irradiation. The processing principles of copper polishing are verified by using a newly developed ultraviolet-ray irradiation polisher. This paper describes the abrasive characteristics of copper plate polished in a mixed liquid of fluorescent substance and photocatalyst exposed to ultraviolet ray. The surface roughness of copper decreased by ultraviolet-ray irradiation using 0.3- and 0.1-μm aluminum oxide and also decreased by solving cathilon (a luminous dye) in spite of ultraviolet-ray irradiation. The surface roughness using 0.3-μm aluminum oxide was smaller than that using 1.0-μm aluminum oxide for pre-polishing, when 0.1-μm aluminum oxide was used in ultraviolet-ray aided machining. On the other hand, the surface was corroded and roughened by ultraviolet-ray irradiation in ultraviolet-ray aided machining using 0.1-μm titanium dioxide. The surface roughness did not decrease in spite of ultraviolet-ray irradiation. It has been observed that 0.1-μm titanium dioxide decomposes cathilon. Then, the findings of this study indicated that the photocatalyst of titanium dioxide has excessive action of oxidation to copper.
- 2009-12-01
著者
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TANAKA Takeshi
Research Division, Saitama Red Cross Blood Center
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Tanaka Takeshi
Research Organization Of Science And Engineering Ritsumeikan University
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