Study in Stability of Dispersion Melts at a High Temperature.

高温下分散体熔体稳定性研究。

• 批准号: 62550490
• 负责人: MORINAGA Kenji
• 金额: $ 1.15万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550490/
• 关键词: Binary GeO_2 systems; Nucleation-growth; Phase separation; Connection and coalescence; Cohesion force; Binary B_2O_3 systems; Liquid-liquid phase separation; 核生成-成長型分相; 連結-合体; 二成分B_2O_3系融体; 二液相分離状態; 体積分率; 表面張力; 密度; 粘度; 計算機シミュレーション

The nucleation-growth type phase separation in binary GeO_2 systems which had a binodal curve between liquidus and crystallization temperatures was observed, and growth mechanism of this type phase separation was discussed in terms of connection and coalescence on coarsening process. moreover, the liquid-liquid phase separation in binary B_2O_3 systems was observed, and the states of phase separation were discussed in terms of properties of melts.The particles of nucleation-growth type phase separation in binary GeO_2 system grew in proportion to the number of connected and coalesced particles. And the number of connected and coalesced particles was increased with volume fraction of particles and cohesion force with surface tensions of phase separated particles and dispersion medium.The process of liquid-liquid phase separation in binary B_2O_3 systems progressed by connect and coalescence of particles and by movement of particles. The states of phase separation were appreciated by phase separation coefficent. The phase separation coefficient was controled by volume fraction of dispersed particles, cohesion force, density and viscosity of melts.

在晶化温度与液相线呈二次曲线的GeO2二元体系中观察到了成核-生长型相分离，并从粗化过程中的连接和合并两个方面讨论了这种相分离的生长机理。此外，还观察到了二元B_2O_3体系中的液-液相分离，并从熔体性质的角度讨论了相分离的状态。在二元GeO_2体系中，成核-生长型相分离颗粒的生长与连接和团聚颗粒的数量成比例。相分离粒子和分散介质的表面张力越大，相分离粒子和分散介质的表面张力越大，连接和聚集的粒子数目越多。B2O_3二元体系的液液相分离过程是通过粒子的连接和聚集以及粒子的运动来进行的。用相分离系数表征相分离状态。相分离系数由分散粒子的体积分数、粘聚力、熔体的密度和粘度控制。

项目成果

Kunihiko NAKASHIMA;Yoshio OHTA;Koichi HAYASHI;Kenji MORINAGA.: Transaction of the Japan Institute of Metals.

Kunihiko NAKASHIMA；Yoshio OHTA；Koichi HAYASHI；Kenji MORINAGA。：日本金属学会汇刊。

Kunihiko NAKASHIMA; Kenji MORINAGA: "T.T.T.(Time-Temperature-Transformation) Diagram of the SrO-GeO_2 system." Yogyo-kyokai-shi. 95. 429-434 (1987)

中岛邦彦；

Kenji MORINAGA; Kunihiko NAKASHIMA: "PHASE SEPARATION IN GERMANATE GLASSES." Journal of Non-Crystalline Solids. 103. 108-116 (1988)

森永健二；

Kenji MORINAGA;Kunihiko NAKASHIMA: Journal of Non-Crystalline Solids. 103. 108-116 (1988)

Kenji MORINAGA；Kunihiko NAKASHIMA：非晶固体杂志。

中島邦彦、森永健次: 窯業協会誌. 95. 429-434 (1987)

Kunihiko Nakajima，Kenji Morinaga：《陶瓷协会杂志》95. 429-434 (1987)。