成果報告書詳細
管理番号20150000000404
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) 革新的設計生産技術 ガラス部材の先端的加工技術開発
公開日2015/7/18
報告書年度2014 - 2014
委託先名独立行政法人産業技術総合研究所 国立大学法人京都大学 石塚硝子株式会社 日本電気硝子株式会社
プロジェクト番号P14030
部署名ロボット・機械システム部
和文要約
英文要約Title:SIP (Cross-Ministerial Strategic Innovation Promotion Program) / Innovative Design/Manufacturing Technologies. Development of advanced glass processing technologies (FY2014-FY2015) FY2014 Annual Report

Formability of glass has been examined in terms of the dependence of deformation on temperature, time and pressure at around deformation temperature. We have examined the measurement method of formability and viscoelasticity. Moreover, modeling techniques for glass viscoelasticity were investigated. Viscoelasticity of polymer is usually simulated using reputation model, however, it was revealed that molecular modeling techniques will be useful in modeling of glass viscoelasticity. The reaction between simple composition glasses and a mold has been investigated by the observation of glass/mold interface, in order to examine an evaluation method for reaction between glass and mold. Molding test and evaluation of preciseness have been carried out using the existing equipment and a mold of a diameter of 3 inches. According the result of the test, we have determined the specification of new molding equipment for a diameter of 8 inches. In addition, production method of a large mold has been examined. Liquid phase synthesis has been examined to obtain organic-substituent free, colorless and transparent bulk glasses with relatively lower treatment temperature, for injection molding. Although transparent precursor-melts and gels were successfully obtained in ZnO-P2O5 and ZnO-P2O5-SiO2 systems, respectively, transparent bulk glass was not obtained after heat treatment. It is further necessary to establish an experimental database for liquid phase preparation scheme in detail. As to the preparation of organic-inorganic hybrid glasses using alkoxysilane as a main starting material, the correlation between polymerization and starting materials, such as metallic salts, catalysts, and water was examined. In addition, it was found that the heat resistance of hybrid glass was improved by controlling the amount of water and that the transparency decreased in the visible region by usage of a specific metallic salt. To improve the processing speed and accuracy for glass cutting using an ultrashort pulse laser, the effect of the polarization state (linear, circular, radial and azimuthal polarization) on the laser material processing were verified. In addition, the pump-probe microscope has been constructed to elucidate the thermal stress around the photoexcited region and strain by a laser induced shock wave. The distribution of elements has been investigated in multicomponent glasses for welding. It was found that the elements strongly bonded with oxygen tended to migrate to the hot region. Therefore, the temperature gradient should cause the element migration, thermomigration. Various shapes of element distribution can be produced by adjusting the temperature distribution by multiple-point-irradiation. In addition, we have researched the suitable laser oscillator and also have designed the peripheral equipment to satisfy the preferable cutting conditions and welding conditions.
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