Wetting Behavior between Fayalite-Type Slags and Solid Magnesia

• Published in: Journal of the American Ceramic Society Vol. 80; no. 9; pp. 2229 - 2236
• Main Authors: Fukuyama, Hiroyuki, Donald, Jeffrey R., Toguri, James M.
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.09.1997; Blackwell; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Basic refractories; Building materials. Ceramics. Glasses; Chemical industry and chemicals; Exact sciences and technology; Refractory products; Wetting; Surface properties; Slag; Surface tension; Contact angle; Interface reaction; Experimental study; Sessile drop method; Basic refractory; Magnesite refractory; Single crystal
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.1997.tb03112.x

The wetting behavior of single‐crystalline magnesia (MgO) by fayalite‐type slag melts has been studied by the sessile‐drop technique, which incorporates high‐temperature X‐ray radiography. The experiments have been performed under oxygen partial pressures of 106 and 104 Pa at a temperature of 1473 K. The mass ratios of iron to silica, Fe/SiO2, in the slag that has been used are 1.44 and 2.05. Infiltration behavior of a fayalite‐type slag into MgO are discussed, based on the experimental results that involve wettability and surface tension. Two phases—magnesio‐wustite and olivine—are observed at the interface. Interdiffusivity in the magnesiowustite solid solution has been determined as a function of the iron oxide content. To investigate the interfacial reaction, experiments that use high‐density MgO crucibles also have been conducted. Phase relations between the magnesiowustite and the olivine, and the rate of growth of the phases, are discussed.