Relationship of Mineralogical and Chemical Composition of Refractory Periclases to Modulus of Rupture At 1,500 Deg to 1,600 Deg C.
As part of its research project in developing improved refractory materials for metallurgical applications, the federal Bureau of Mines obtained hot modulus of rupture data at 1,500 deg, 1,550 deg, and 1,600 deg c on samples of 13 refractory periclase materials produced from seawater, lake brines, and natural magnesite. The periclase samples also were characterized to establish chemical and mineralogical composition and microstructure. The results indicated that a high mgo content does not necessarily assure good hot strength and that an optimum and varying cao-sio2 ratio exists for each individual periclase sample. Research at the Tuscaloosa Research Center is carried out under an agreement between the Bureau of Mines, U.S. Department of the Interior, and the University of Alabama.