【摘要】 利用差热-热重分析方法,研究了Gd2O3和NH4HF2反应中间产物NH4GdF4的合成机理。结果表明,NH4GdF4是在NH4HF2熔化后与Gd2O3通过固-液相反应直接合成的;Gd2O3和NH4HF2反应的另一种中间产物为NH4F,NH4F在稍高的温度下热分解为NH3和HF;NH4F与GdF3不能合成NH4GdF4;GdOF也可以与NH4HF2反应合成NH4GdF4,但GdOF不是Gd2O3和NH4HF2反应的中间产物。分析了Gd2O3和NH4HF2反应不能完全合成NH4GdF4的原因。更多还原

【Abstract】 Mechanism of intermediate product NH4GdF4 of a reaction of Gd2O3 and NH4HF2 was studied based on DTA-TG analysis.The results showed that NH4GdF4 is directly synthesized by solid-liquid reaction formed by melting NH4HF2 and solid Gd2O3;NH4F is another intermediate product of a reaction of Gd2O3 and NH4HF2.NH4F is decomposition to NH3 and HF in slightly higher temperatures;NH4GdF4 can not be synthesized by NH4F and GdF3;NH4GdF4 can be synthesized by GdOF and NH4HF2,but GdOF is not intermediate product of a reaction of Gd2O3 and NH4HF2.The reason that NH4GdF4 can not be fully synthesized was dicussed.更多还原