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In Situ Observation of Phase Separation of a Barium Borate Melt in a Stable Immiscibility Region under Microgravity
Author(s) -
Inoue Satoru,
Makishima Akio,
Inoue Hiroyuki,
Soga Kohei,
Konishi Tomoya,
Asano Tomoyoshi,
Ishii Yuu,
Koyama Masato
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03135.x
Subject(s) - drop (telecommunication) , materials science , precipitation , phase (matter) , analytical chemistry (journal) , boron , mineralogy , optics , chromatography , geology , chemistry , meteorology , telecommunications , physics , organic chemistry , computer science
The precipitation of droplets was directly observed on a BaO–B 2 O 3 melt in a drop shaft experiment. This is the first time that precipitation of droplets has been observed in a 4.5 s drop test. The melt film of 4BaOz96B 2 O 3 (mol%) held on a platinum wire loop was heated above the critical tem‐perature to produce uniformity and was cooled down to the phase separation temperature range. Phase separation of the melt was observed directly with a video camera. The IR image of the melt was simultaneously detected with a CCD array and was converted into a two‐dimensional thermograph.