Crystallization Behaviors of Mold Fluxes Containing Li2O Using Single Hot Thermocouple Technique
スポンサーリンク
概要
- 論文の詳細を見る
Minor addition of Li2O (<2 mass%) can significantly alter the melting temperature and viscosity of a mold flux. However, the crystallization tendency of mold fluxes containing Li2O more than 2 mass% hasnt been understood. In this paper, single hot thermocouple technique, X-ray diffraction, and Back Scattered Electron (BSE) were employed to investigate the crystallization behavior concerned with CCT and TTT diagrams of mold fluxes containing high content of Li2O.The critical cooling rate and crystallization rate of samples were increased with the addition of Li2O, whether there is Na2O or not. But the incubation time was reduced obviously with Li2O more than 6 mass% in mold fluxes. The critical cooling rate and incubation time of NL1.5 sample (Na2O=8 mass%, Li2O=1.5 mass%) were close to those of L7 sample (Na2O=0 mass%, Li2O=7 mass%). Moreover, there is no difference in the crystal phase of the two samples, and the crystal phases precipitated at high temperature and low temperature were respectively Ca2(SiO4) and Ca4Si2O7F2. Li-cuspidine was promoted to precipitate when the basicity of the sample was increased. The small, dense grains of cuspidine were observed in NL1.5 sample, and the thickness of slag film was 0.4 mm more than that of L7 sample. The heat flux of NL1.5 sample measured was 10% less than that of L7 sample, as expected. Therefore, high content of Li2O can be substituted by the combination of Na2O and minor of Li2O, as is the composition in the commercial mold fluxes.
論文 | ランダム
- 27pYL-6 フォーム密度制御による高速電子生成の最適化(27pYL 慣性核融合(高速点火・実験・理論),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))
- 歯根膜における活性型MMP-2は微細線維を分解するか?
- 27pYL-5 高速点火核融合のコア加熱におけるコーン並びにコア物質依存性(27pYL 慣性核融合(高速点火・実験・理論),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))
- 卵巣摘出成熟ラットにおける脛骨と腓腹筋に及ぼす走行運動トレーニングの影響
- 貯蔵性水産食品製造に関する研究 第11報 : 食品表面への塩酸ゴム被膜形成による食品の防腐