核化学与放射化学2026，Vol.48Issue(4)：364-371,8.DOI:10.7538/hhx.2026.YX.2026035
低浓度水蒸气/氮气混合气中金属铈的氮化反应
Nitridation Reaction of Metallic Cerium in Mixed Gas of Low-Concentration Water Vapor and Nitrogen
黄昆 1张生栋 1陈锦 1苗智超 2杨建勋 1丁有钱 1牟景林 2刚发源 1姚曜晖 1周晋2
作者信息
- 1. 中国原子能科学研究院 放射化学研究所,北京 102413
- 2. 山东理工大学 化学化工学院,山东 淄博 255000
- 折叠
摘要
Abstract
The efficient conversion of metals into nitrides and oxides is one of the key steps in nuclear fuel processing.In this work,metallic cerium(Ce)was used as a surrogate material.The nitridation reaction of metallic Ce was achieved in a mixed atmosphere of low-concentration water vapor(water vapor partial pressure≤5.0 kPa)and nitrogen(N2).The effects of water vapor partial pressure(0.5,1.0,2.5 and 5.0 kPa)and reaction temperature(310,330,350 and 370℃)on the nitridation reaction rate of metallic Ce were investigated.According to the pressure change during the reaction process and the characterization results of X-ray diffraction(XRD),it is found that metallic Ce reacts with N2 in the presence of low-concentration water vapor and is completely converted to cerium nitride(CeN).Increasing the partial pressure of water vapor and the reaction temperature can accelerate the nitridation reaction rate of metallic Ce.When liquid water is used instead of water vapor,metallic Ce can still undergo the nitridation reaction and be converted into CeN,further simplifying the nitridation reaction process.In addition,through the characterization by XRD,Raman spectroscopy and X-ray photoelectron spectroscopy,it is demonstrated that the CeN product is rapidly oxidized and converted into high-purity cerium dioxide(CeO2)in an air atmosphere.This work provides new insights into the mechanisms and processes of metal nitridation-oxidation reactions.关键词
铈/氮化铈/二氧化铈/低浓度水蒸气/氮化反应Key words
cerium/cerium nitride/cerium dioxide/low-concentration water vapor/nitridation reaction分类
能源科技引用本文复制引用
黄昆,张生栋,陈锦,苗智超,杨建勋,丁有钱,牟景林,刚发源,姚曜晖,周晋..低浓度水蒸气/氮气混合气中金属铈的氮化反应[J].核化学与放射化学,2026,48(4):364-371,8.
