Thermal Properties of CaO-Al2O3-SiO2 Glass Containing Chlorine

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  • TAKEDA Dai
    Major of Energy and Environmental Engineering, Nagaoka University of Technology
  • MATUSITA Kazumasa
    Department of Environmental Engineering, Nagaoka University of Technology
  • KOIDE Manabu
    Department of Environmental Engineering, Nagaoka University of Technology

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Other Title
  • 塩素含有ＣａＯ‐Ａｌ２Ｏ３‐ＳｉＯ２ガラスの熱特性
  • 塩素含有CaO-Al2O3-SiO2ガラスの熱特性
  • エンソ ガンユウ CaO Al2O3 SiO2 ガラス ノ ネツ トクセイ

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Chlorine-containing CaO-Al2O3-SiO2 glasses were prepared. TG-DTA (thermogravimetry-differential thermal analysis) and TG-MS(thermogravimetry-mass spectrometric analysis) results showed that HCl gas was liberated from the glass above the temperature near glass transition. It was confirmed that chlorine in the glass reacts with water in the glass and in the atmosphere. It was considered that chlorine is replaced with oxygen in the atmosphere at the higher temperature. Glass transition temperature was found to decrease with introducing chlorine into the glass, suggesting that the glass structure was weakened by chlorine ions. The surface of glass containing chlorine has high reactivity with water and carbon dioxide in atmosphere.

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