スコリア溶融物の結晶化と物性に及ぼす添加物(ショ糖,CaO,MgO,SiO_2)の影響

概要

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The crystallization process of the melt of the domestic scoria mineral (CaO-MgO-Al_2O_3-SiO_2 system) was investigated. The raw material contains more than 10 wt% iron oxide and about 3 wt% titania. One or two wt% sucrose was added to control the nucleation and crystallization; by adjusting the ferrous/ferric ratio in the scoria glass. When sucrose was added, the ferrous/ferric ratio ranged from 0.93 to 1.32. The nucleation and crystallization temperatures, and the activation energy obtained from DTA decreased when, the sucrose, SiO_2, CaO and MgO were added. The major crystalline phases in the glass-ceramics were diopside, alkermanite, and gehlenite. When 1-2 wt% sucrose were added to scoria glass, the glass-ceramics with fine particles and homogeneous microstructure were obtained. The physical properties were also improved by the addition of sucrose as well as other additives.
社団法人日本セラミックス協会の論文
1990-07-01