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In Situ Observation of Phase Separation of a Barium Borate Melt in a Stable Immiscibility Region under Microgravity

1997; Wiley; Volume: 80; Issue: 9 Linguagem: Inglês

10.1111/j.1151-2916.1997.tb03135.x

1551-2916

Satoru Inoue, Akio Makishima, Hiroyuki Inoue, Kohei Soga, Tomoya Konishi, Tomoyoshi Asano, Yuu Ishii, Masato Koyama,

Paleontology and Stratigraphy of Fossils

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.