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A platform for research: civil engineering, architecture and urbanism
Thorium dioxide nuclear fuel foil and preparation method thereof
The invention belongs to the technical field of nuclear fuel, and discloses a thorium dioxide nuclear fuel foil and a preparation method thereof. The preparation method comprises the following steps: mixing thorium dioxide powder with a dispersant and a binder, carrying out ball milling, drying, crushing, and carrying out cold press molding to obtain a green body; and sequentially carrying out pre-sintering, sintering and hot isostatic pressing on the green body to obtain the thorium dioxide nuclear fuel foil. Thorium dioxide powder serves as a forming raw material, a dispersing agent and a binding agent are added and mixed for ball milling, aggregation among thorium dioxide powder particles is reduced, the strength and density of a formed blank can be improved in subsequent cold press forming, the surface of the blank is complete when the blank forms a foil, then subsequent pre-sintering and sintering are conducted, the dispersing agent and the binding agent are removed, and the foil is obtained. And finally, hot isostatic pressing is carried out, holes left after the dispersing agent and the binding agent are removed are reduced, the compactness of the foil is improved, the finally prepared foil is complete in shape, and the size meets the requirements of reactor nuclear fuel.
本发明属于核燃料技术领域，公开了一种二氧化钍核燃料箔片及其制备方法。本发明将二氧化钍粉末与分散剂、粘结剂混合进行球磨然后干燥后破碎，再进行冷压成型，得到坯体；对坯体依次进行预烧结、烧结、热等静压，得到二氧化钍核燃料箔片。以二氧化钍粉末作为成型原料，添加分散剂和粘结剂混合进行球磨，使二氧化钍粉末颗粒之间减少聚集，在后续冷压成型中可以改善成型坯体的强度以及密度，使坯体在形成箔片时表面完整，再进行后续预烧结和烧结，脱除分散剂和粘结剂，最后进行热等静压，减少分散剂和粘结剂脱除后残留的孔洞，提高箔片的致密度，使最终制得的箔片形状完整、尺寸符合反应堆核燃料的要求。
Thorium dioxide nuclear fuel foil and preparation method thereof
The invention belongs to the technical field of nuclear fuel, and discloses a thorium dioxide nuclear fuel foil and a preparation method thereof. The preparation method comprises the following steps: mixing thorium dioxide powder with a dispersant and a binder, carrying out ball milling, drying, crushing, and carrying out cold press molding to obtain a green body; and sequentially carrying out pre-sintering, sintering and hot isostatic pressing on the green body to obtain the thorium dioxide nuclear fuel foil. Thorium dioxide powder serves as a forming raw material, a dispersing agent and a binding agent are added and mixed for ball milling, aggregation among thorium dioxide powder particles is reduced, the strength and density of a formed blank can be improved in subsequent cold press forming, the surface of the blank is complete when the blank forms a foil, then subsequent pre-sintering and sintering are conducted, the dispersing agent and the binding agent are removed, and the foil is obtained. And finally, hot isostatic pressing is carried out, holes left after the dispersing agent and the binding agent are removed are reduced, the compactness of the foil is improved, the finally prepared foil is complete in shape, and the size meets the requirements of reactor nuclear fuel.
本发明属于核燃料技术领域，公开了一种二氧化钍核燃料箔片及其制备方法。本发明将二氧化钍粉末与分散剂、粘结剂混合进行球磨然后干燥后破碎，再进行冷压成型，得到坯体；对坯体依次进行预烧结、烧结、热等静压，得到二氧化钍核燃料箔片。以二氧化钍粉末作为成型原料，添加分散剂和粘结剂混合进行球磨，使二氧化钍粉末颗粒之间减少聚集，在后续冷压成型中可以改善成型坯体的强度以及密度，使坯体在形成箔片时表面完整，再进行后续预烧结和烧结，脱除分散剂和粘结剂，最后进行热等静压，减少分散剂和粘结剂脱除后残留的孔洞，提高箔片的致密度，使最终制得的箔片形状完整、尺寸符合反应堆核燃料的要求。
Thorium dioxide nuclear fuel foil and preparation method thereof
一种二氧化钍核燃料箔片及其制备方法
LIU WENTAO (author) / YANG GUANGYU (author) / HE YABIN (author) / LU YONGHENG (author) / DU JIANGPING (author) / LIU YEGUANG (author) / ZHAI JINGJING (author)
2024-07-05
Patent
Electronic Resource
Chinese
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