Liquid-liquid phase separation process in the two-liquid regions of binary borate melts

Kunihiko Nakashima, Koichi Hayashi, Yoshio Ohta, Kenji Morinaga

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The liquid-liquid phase separation process in the stable immiscibility regions of binary borate melts was directly observed by the hot-thermocouple method and was investigated using phase-separated glasses obtained by the hot-thermocouple and crucible methods. Furthermore, to describe the degree of progress of the phase separation state quantitatively, the phase separation coefficient was defined, and factors influencing the phase separation process were discussed by means of Stokes' law. The liquid-liquid phase separation process progresses owing to the coarsening of particles by connection and coalescence and the traveling process of coarser particles to the interface of the two-liquid phase. The coarsening process of particles was controlled by the volume fraction Vf of particles and the interfacial tension γA/B between the particles and the dispersed phase, and the growth rate α of particles was decided by the cohesive coefficient Vf · γA/B. The traveling process of particles was examined using Stokes' law, and the phase separation coefficient Ω representing the degree of progress of the phase separation state was estimated by using the progressive coefficient of the phase separation (UH and Uc) defined by Stokes' law.

Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalMaterials Transactions, JIM
Volume32
Issue number1
DOIs
Publication statusPublished - Jan 1 1991

Fingerprint

Borates
borates
Phase separation
liquid phases
Liquids
Stokes law
liquids
Coarsening
coefficients
thermocouples
Thermocouples
Particles (particulate matter)
Crucibles
crucibles
Coalescence
coalescing
Surface tension
Volume fraction
interfacial tension
solubility

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Liquid-liquid phase separation process in the two-liquid regions of binary borate melts. / Nakashima, Kunihiko; Hayashi, Koichi; Ohta, Yoshio; Morinaga, Kenji.

In: Materials Transactions, JIM, Vol. 32, No. 1, 01.01.1991, p. 37-42.

Research output: Contribution to journalArticle

Nakashima, Kunihiko ; Hayashi, Koichi ; Ohta, Yoshio ; Morinaga, Kenji. / Liquid-liquid phase separation process in the two-liquid regions of binary borate melts. In: Materials Transactions, JIM. 1991 ; Vol. 32, No. 1. pp. 37-42.
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