BaB_2O_4 組成過冷却融液の特異性と固化晶出相(<特集>「融液成長における不安定性」)

抄録

The relationship between specific properties of BaB_2O_4 supercooling melt and crystallized phases have been investigated by the solidifying experiments of BaB_2O_4 melt using β-BaB_2O_4 single crystal as starting materials. α (high temperature phase), β (low temperature phase) or mixture phase were nudeated from the supercooling melt above 1070℃. BaB_2O_4 supercooling melt transformed into glass like phase at about 1070℃. The glass rapidly crystallized, and α, β or mixture phase were obtained when the cold-finger was touched on the glass surface. α phase preferentially crystallized from glass at 1000-1070℃, then β phase preferentially crystallized from glass below 1000℃. It is suggested that the structure of the glass is similar to BaB_2O_4 crystal structure.