Synthesis and thermodynamic analysis of nano-La₂O₃

【摘要】 <正>The thermodynamic parameters of La（NO₃）₃ and La（OH）₃ are evaluated and the thermodynamics of nano-La₂O₃ syn- thetic process is analyzed.On the base of thermodynamic analysis,La₂O₃ nano-powders are prepared by the sol-gel method and the experi- ment scheme is designed by an orthogonal method.The dry-gelatin is analyzed with differential thermal analysis/thermo-gravimetric analy- sis（TGA-DTA）and X-ray diffraction method.The microstructure of nano-La₂O₃ powders is observed by transmission dectron micro- scope.The synthetic parameters affecting the average grain size and dispersivity of nano-La₂O₃ particles are experimentally examined and analyzed.All the results indicate that nano-La₂O₃ particles well-dispersed are obtained and the average grain size is in the range of 20—50 nm.更多还原

【Abstract】 The thermodynamic parameters of La（NO₃）₃ and La（OH）₃ are evaluated and the thermodynamics of nano-La₂O₃ syn- thetic process is analyzed.On the base of thermodynamic analysis,La₂O₃ nano-powders are prepared by the sol-gel method and the experi- ment scheme is designed by an orthogonal method.The dry-gelatin is analyzed with differential thermal analysis/thermo-gravimetric analy- sis（TGA-DTA）and X-ray diffraction method.The microstructure of nano-La₂O₃ powders is observed by transmission dectron micro- scope.The synthetic parameters affecting the average grain size and dispersivity of nano-La₂O₃ particles are experimentally examined and analyzed.All the results indicate that nano-La₂O₃ particles well-dispersed are obtained and the average grain size is in the range of 20—50 nm.更多还原