The system K2SO4-K2S

• DOI: 10.1007/bf01912875
• Publication Date: 2005-07-29T22:30:31Z
• Authors: C. W. So; D. Barham
• Keywords: Liquidus; Solidus; Isothermal process

A new experimental technique has been developed to determine the phase equilibrium diagram for system K2SO4-K2S. The involves isothermal thermogravimetry of potassium sulphate during reduction sulphide at elevated temperatures in a stream dry oxygen-free hydrogen gas. Several abrupt changes rate weight loss occur each curve and these can be related system. On basis such results liquidus solidus (solid solution) boundaries located. Simple thermal analysis is used confirm eutectic temperature various temperatures. K2SO4-K2S simple with 610‡ 23 mole % K2S. limits solid solubility K2S K2SO4 are 11 36 mole% respectively. odd shape curves on side suggests possibility both solutions. No evidence this was obtained from analysis.