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In situ observation of crystallization of mold slag using a digital optical microscope in an infrared furnace
Author(s) -
Zhu Lilong,
Wang Qian,
Wang Qiangqiang,
Zhang Shaoda,
He Shengping
Publication year - 2019
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/jace.16085
Subject(s) - crystallization , slag (welding) , differential scanning calorimetry , mold , optical microscope , materials science , crucible (geodemography) , microscope , infrared , metallurgy , evaporation , analytical chemistry (journal) , mineralogy , composite material , scanning electron microscope , optics , chemistry , chromatography , physics , computational chemistry , organic chemistry , thermodynamics
The complete crystallization process of mold slag in the crucible (inner diameter: 6.2 mm) was successfully recorded in situ using a digital optical microscope and image processing software in an infrared furnace ( IR ‐ MOP ). The crystallization behavior of non‐volatile mold slag tested with the new method is consistent with the findings of differential scanning calorimetry ( DSC ) analysis. Although the volatilization ratios of volatile mold slag during both DSC and SHTT experiments are greater than 8%, it is less than 1.2% during IR ‐ MOP experiments equipped with an isolated observation system, which explains why the difference in the initial crystallization temperature measured by the three methods was very large. Therefore, IR ‐ MOP equipped with an isolated observation system can record and accurately measure the crystallization behavior of volatile mold slag.