都市ゴミ焼却飛灰の人口岩石に及ぼすTiO_2とNa_2Oの添加剤の影響

概要

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Influence of additives and hot-pressing temperature on properties of the synthetic rock was investigated, which was developed for preparing a harmless and stabilized crystalline solid of fly ash from municipal waste incinerator. Upon sintering at 1200℃ for 16 h, it was revealed that the addition of 20 mass% TiO_2 and 1.5 mass% Na_2O was necessary for the preparation of dense rock products. X-ray diffractometry showed that these additives promoted the formation of perovskite(CaTiO_3)and gehlenite(Ca_2Al_2SiO_7)minerals. During hot pressing, bulk density of the synthetic rock increased steeply with temperature between 1000 and 1100℃. On the other hand, its open porosity decreased rapidly with temperature between 1050 and 1150℃. These facts imply that a temperature of 1100-1150℃ is suitable for the hot pressing of fly ash.
社団法人日本セラミックス協会の論文
2002-01-01