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Volume :26 Issue : 2 1999      Add To Cart                                                                    Download

The investigation of the phase diagram of the binary system of M203-5b203

Auther : ORHAN TURKOGLU, MUSTAFA SOYLAK AND NEVZAT KULCU

Erciyes University, Fen-Edebiyat Faculty, Department of Chemistry, 38039 Kayseri, Turkey

ABSTRACT

The phase diagram of the binary system of bismuth and antimony sesquioxides were inves­tigated in the air atmosphere in the mole fractions of Bi2O3 between 0.000 and 0.500. Three different phase regions that were dependent on the furnace temperature and heating period were obtained by the solid state reactions. In the first region, a heterogeneous mixture that contained orthorhombic Sb2O4 and monoclinic BiSbO4 phases occurred in the temperature Lange between 700 and 1100°C. In the second region, the heterogeneous mixture transformed to a homogeneous solid solution that was characterized by a monoclinic crystal structure (BiSbO4 type). Fusion of the homogeneous solid solution which decomposed with volatilis­ation of Sb2O3 took place in the third region.

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