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Title: Phase diagram of thermodynamic non-equilibrium state of MgO-B2O3-18%MgCl2-H2O system at 0°C
Authors: Zhu, Lixia
Gao, Shiyang
Xia, Shuping
Issue Date: Jan-2003
Publisher: NISCAIR-CSIR, India
Abstract: The supersaturated solutions of MgO-B2O3 18%MgCl2-H2O with different mole ratios of MgO: B2O3, have been prepared and kept at 0±0.1°C. The crystallization paths of boric acid, Mg-borates and Mg-oxychloride from the solutions have been determined by chemical analysis of the solution samples taken at a given time interval during crystallization, and then the liquid-solid phase diagram of thermodynamic non-equilibrium state of MgO-B2O3- 18%MgCl2-H2O system at 0°C has been constructed. In this phase diagram, five crystallization fields appear, boric acid (H3BO3), mcallisterite (MgO·3B2O3 ·7.5H2O), hungtsaite (MgO.2B2O3.9H2O), inderite (2MgO.3B2O3.15H2O) and magnesium oxychloride (5 Mg(OH)2·MgCl2·8H2O).
Page(s): 35-41
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.42A(01) [January 2003]

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