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引言生产核燃料芯块的 UO_2粉末,一般是在氢气氛中热分解铀酸铵(AU)制备的。在工业上通常采用氢氧化铵溶液从硝酸铀酰溶液中沉淀铀酸铵。文献调研表明铀酸铵粉末的性质,包括组成、表面积、粒度和密度,在很大程度上取决于沉淀条件,即 pH、铀浓度、温度、
Introduction UO 2 powders for the production of nuclear fuel pellets are generally prepared by the thermal decomposition of ammonium uranyl (AU) in a hydrogen atmosphere. Ammonium hydroxide solution is precipitated from uranyl nitrate solution industrially. Literature research shows that the properties of ammonium uranium powder, including composition, surface area, particle size and density, depend to a great extent on the precipitation conditions ie pH, uranium concentration, temperature,