在低性玻璃和玻璃网络结构分析中Ce的溶解度和价值变化
Liu Yang1, Yongchang Zhu1,2, Jichuan Huo1,3
1State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China.
Materials (Basel, Switzerland)
|July 29, 2023
概括
(Ce) 固定在玻璃废料中显示出高溶解度 (重量25%) 和优异的水抵抗力 (<10−4 gm−2d−1). 这项研究详细介绍了Ce Ce.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 玻璃化学 玻璃化学
背景情况:
- 低性玻璃玻璃是核废物固定的潜在基材.
- 在模拟废玻璃中, (Ce) 作为三价和四价活性化物的替代品.
研究的目的:
- 为了研究在模拟废玻璃中的固定.
- 了解氧化 (CeO2) 对玻璃性能的影响,包括溶解度,网络结构,热稳定性和化学耐久性.
主要方法:
- 融化热处理用于玻璃合成.
- 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 用于溶解性和相位分析.
- 拉曼光谱用于网络结构分析.
- 用X射线光电子光谱 (XPS) 测定的价值.
- 热分析和产品一致性测试 (PCT) 稳定性和抗水性.
主要成果:
- 在低性玻璃中,的溶解率至少为25%,在这个极限以上形成球形CeO2沉物.
- 通过占据玻璃网络中的间歇点而被固定.
- 增加的CeO2兴奋剂导致脱聚合和从[BO3]到[BO4]单位的转变,约60%的Ce4+转化为Ce3+.
- 玻璃的热稳定性最初随着CeO2含量增加而增加,然后下降.
- 所有测试的玻璃都表现出了出色的水抵抗性,28天的平均Ce质量损失低于10−4 gm−2d−1.
结论:
- 低性玻璃玻璃有效地使动不动,可达到25%的重量.
- 的结合改变了玻璃网的结构,影响了热稳定性.
- 模拟废物玻璃具有卓越的化学耐用性和抗水性,适用于核废物管理.
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