The thermal behavior of Tb_2(BA)_6(PHEN)_2 (BA: benzoate, and PHEN:1,10-phenanthroline) in a static air atmosphere was investigated by TG-DTG, SEM and IR techniques.By the kinetic method of processing thermal analysis...The thermal behavior of Tb_2(BA)_6(PHEN)_2 (BA: benzoate, and PHEN:1,10-phenanthroline) in a static air atmosphere was investigated by TG-DTG, SEM and IR techniques.By the kinetic method of processing thermal analysis data put forward by Malek et al., it is definedthat the kinetic model for the first-step thermal decomposition is SB(m, n). The activation energyE for this step reaction is 99.07 kJ/mol, the entropy of activation ΔS~≠ is -84.72 J/mol, theenthalpy of activation ΔH~≠ is 94.26 kJ/mol, the free energy of activation ΔG~≠ is 144.77 kJ/moland the pre-exponential factor lnA is 20.93. The lifetime equation at mass-loss of 10% was deducedas lnτ = -29.0312 + 19760.83/T by isothermal thermogravimetric analysis.展开更多
There are some similarities and differences between English and Chinese onomatopoeia. The former mainly includes rhetorical functions and characteristics of absolute structures.and the latter mainly includes syntactic...There are some similarities and differences between English and Chinese onomatopoeia. The former mainly includes rhetorical functions and characteristics of absolute structures.and the latter mainly includes syntactic functions, motivations and changes in usage. In poetry translation teaching, paying much attention to the contrastive studies on the similarities and differences between English and Chinese onomatopoeia is very helpful to the improvement of students' abilities in their appreciating and commenting the unity of the beauty in meaning, sound, and style.展开更多
基金This project was supported by the Natural Science Foundation of Hebei Province (No. 202140 No. 203148) and Hebei Education Department (No. 2001121).
文摘The thermal behavior of Tb_2(BA)_6(PHEN)_2 (BA: benzoate, and PHEN:1,10-phenanthroline) in a static air atmosphere was investigated by TG-DTG, SEM and IR techniques.By the kinetic method of processing thermal analysis data put forward by Malek et al., it is definedthat the kinetic model for the first-step thermal decomposition is SB(m, n). The activation energyE for this step reaction is 99.07 kJ/mol, the entropy of activation ΔS~≠ is -84.72 J/mol, theenthalpy of activation ΔH~≠ is 94.26 kJ/mol, the free energy of activation ΔG~≠ is 144.77 kJ/moland the pre-exponential factor lnA is 20.93. The lifetime equation at mass-loss of 10% was deducedas lnτ = -29.0312 + 19760.83/T by isothermal thermogravimetric analysis.
文摘There are some similarities and differences between English and Chinese onomatopoeia. The former mainly includes rhetorical functions and characteristics of absolute structures.and the latter mainly includes syntactic functions, motivations and changes in usage. In poetry translation teaching, paying much attention to the contrastive studies on the similarities and differences between English and Chinese onomatopoeia is very helpful to the improvement of students' abilities in their appreciating and commenting the unity of the beauty in meaning, sound, and style.
