(U,Pu) O2固体溶液的燃烧合成:从参数研究到烧结颗粒
Anna Hautecouverture1,2, Paul Estevenon2, Elena Bazarkina3,4
1ICSM, Univ Montpellier, CNRS, CEA, ENSCM, Bagnols-sur-Cèze, France.
Dalton transactions (Cambridge, England : 2003)
|January 28, 2026
概括
溶液燃烧合成 (SCS) 有效地产生了化物混合氧化物,特别是-氧化物,具有核燃料应用所需的纳米特征.
科学领域:
- 核化学和材料科学 核化学和材料科学
- 固态化学 固态化学
- 粉末金 粉末金是什么
背景情况:
- 动氨酸混合氧化物,特别是-氧化物,对于核燃料应用至关重要.
- 溶液燃烧合成 (SCS) 为合成先进陶材料提供了一个有前途的途径.
- 之前的研究表明,使用替代材料和纯活性氧化物有SCS的潜力.
研究的目的:
- 通过使用酸作为燃料的溶液燃烧合成 (SCS) 来合成活性化物混合氧化物.
- 为了优化SCS参数,包括燃料量和Pu/(U + Pu) 组成,以达到所需的粉末特性.
- 评估合成的U,Pu) O2+x粉末是否适合用于核燃料生产.
主要方法:
- 溶液燃烧合成 (SCS) 使用酸作为燃料来源.
- 系统地改变燃料数量和含量 (Pu/(U + Pu)) 以控制粉末的特性.
- 合成粉末的相位,同质性和颗粒大小的表征.
- 在选定的U0.90Pu0.10O2+x粉末上进行压缩和低温烧结试验.
主要成果:
- 在各种SCS条件下成功合成了固体溶液 (U,Pu) O2+x.
- 由此产生的活性化物混合氧化物粉末表现出均的阴离子分布和纳米特征.
- 一颗U0.90Pu0.10O2+x颗粒通过低温烧结实现了88%的理论密度,这归因于纳米粉末尺寸.
- 烧结颗粒显示出均的分布和预期的孔状形态,尽管有剩余的碳存在.
结论:
- 溶液燃烧合成是生产纳米级-混合氧化物粉末的有效方法.
- 合成的 (U,Pu) O2+x粉末适用于压缩和烧结,显示了MOX燃料制造的潜力.
- 由于SCS衍生的粉末的纳米性质,可以实现低温烧结.
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