Si-O-Nb/Si-O-Ta結合を持つ有機無機ハイブリッドの熱分解挙動に関する研究

概要

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The pyrolysis behavior of organic-inorganic hybrids with Si-O-Nb/Si-O-Ta oxygen bridged heterometallic bonds was investigated. The easy cleavage of Si-O-Nb bonds was confirmed by infrared (IR) spectra, and Si-O-Ta bonds were broken at higher temperatures, suggesting the difference in energy between Si-O and O-M (M=Nb and Ta) . The decomposition from T unit to D and Q units was analyzed by ^<29>Si-nuclear magnetic resonance (NMR). The redistribution due to the exchange reactions between Si-O and Si-C bonds was confirmed, which was also supported by thermogravimetric analysis-mass spectroscopy (TG-MS) results. Disiloxane and silane from the hybrid with Si-O-Nb bonds were detected at lower temperatures than those from the hybrids with Si-O-Ta or without Si-O-Nb bonds. The evolution temperature of these gases was close to the cleavage temperature of Si-O-Nb/Si-O-Ta bonds, which indicates that the cleavage of Si-O-Nb/Si-O-Ta bonds affects the redistribution. [Received May 15, 2003; Accepted July 24, 2003]
社団法人日本セラミックス協会の論文
2003-11-01