Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Large-grain uranium oxide sintering method and fuel pellet
A large-grain uranium oxide sintering method comprises the following steps: providing uranium oxide raw material powder, and doping a doping agent comprising Cr2O3 and TiO2 and a lubricant to obtain mixed powder; pressing the mixed powder into a green body; and sintering the green body in a hydrogen atmosphere at the sintering temperature of 1700-1800 DEG C to obtain the uranium oxide sintered body. According to the method, Cr2O3 and TiO2 are mixed to serve as the doping agent, the grain size of the sintered product can be effectively increased, meanwhile, the negative influence of TiO2 and volatile Cr on the density of the sintered product in the pure hydrogen atmosphere is restrained, and the sintering quality of large-grain uranium oxide is improved. The invention also provides a large-grain uranium oxide fuel pellet.
一种大晶粒氧化铀烧结方法，包括以下步骤：提供氧化铀原料粉末，并掺入包括Cr2O3和TiO2的掺杂剂和润滑剂得到混合粉体；将混合粉体压制为生坯；在氢气气氛下对生坯进行烧结，烧结温度1700℃‑1800℃，得到氧化铀烧结体。该方法采用Cr2O3和TiO2混合作为掺杂剂，能够有效提高烧结产物的晶粒尺寸，同时抑制纯氢气氛围中TiO2与挥发性Cr对烧结产物致密度的负面影响，提高大晶粒氧化铀烧结质量。本发明还提供一种大晶粒氧化铀燃料芯块。
Large-grain uranium oxide sintering method and fuel pellet
A large-grain uranium oxide sintering method comprises the following steps: providing uranium oxide raw material powder, and doping a doping agent comprising Cr2O3 and TiO2 and a lubricant to obtain mixed powder; pressing the mixed powder into a green body; and sintering the green body in a hydrogen atmosphere at the sintering temperature of 1700-1800 DEG C to obtain the uranium oxide sintered body. According to the method, Cr2O3 and TiO2 are mixed to serve as the doping agent, the grain size of the sintered product can be effectively increased, meanwhile, the negative influence of TiO2 and volatile Cr on the density of the sintered product in the pure hydrogen atmosphere is restrained, and the sintering quality of large-grain uranium oxide is improved. The invention also provides a large-grain uranium oxide fuel pellet.
一种大晶粒氧化铀烧结方法，包括以下步骤：提供氧化铀原料粉末，并掺入包括Cr2O3和TiO2的掺杂剂和润滑剂得到混合粉体；将混合粉体压制为生坯；在氢气气氛下对生坯进行烧结，烧结温度1700℃‑1800℃，得到氧化铀烧结体。该方法采用Cr2O3和TiO2混合作为掺杂剂，能够有效提高烧结产物的晶粒尺寸，同时抑制纯氢气氛围中TiO2与挥发性Cr对烧结产物致密度的负面影响，提高大晶粒氧化铀烧结质量。本发明还提供一种大晶粒氧化铀燃料芯块。
Large-grain uranium oxide sintering method and fuel pellet
一种大晶粒氧化铀烧结方法及燃料芯块
YOU (Autor:in) / LU JUNQIANG (Autor:in) / LU HUI (Autor:in) / ZHU LIBING (Autor:in) / DING JIE (Autor:in) / CHEN XIANGYANG (Autor:in)
25.06.2024
Patent
Elektronische Ressource
Chinesisch
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