LIU Haifeng^1a,1b, ZHAO Jian^1b, WANG Hua², ZHU Yongchang², LI Jie^1b,ZHANG Xingquan1^a,1b, ZHENG Kui^1a, HUO Jichuan^1a,1b

(1 a.State Key Laboratory of Environment-friendly Energy Materials; b.School of Materials Science and Engineering，Southwest University of Science and Technology, Mianyang 621010, China; 2.Ceramics Science Institute, China Building Materials Academy, Beijing 100024, China)

Abstract: In order to develop a perovskite-type parent phase with larger lattice and stable structure to realize the lattice immobilization of 90Sr effectively, Ba_1-xSr_xZrO₃(0≤x≤1)immobilization forms were synthesized by sol-gel method, with 88Sr used as simulated element and zirconium-based perovskite-type BaZrO₃ used as a parent phase.The results show that the perovskite-type Ba_1-xSr_xZrO₃ with a single phase can be successfully synthesized by so-gel method.Sr is immobilized effectively in the lattice position of the perovskite-type oxide.The maximum solid soluble amount of Ba_1-xSr_xZrO₃ for Sr has been obtained, i.e., x=1.0.Sr²⁺ with smaller radius can enter the A position of perovskite-type Ba_1-xSr_xZrO₃ to replace Ba²⁺, resulting in decrease of cell volume and lattice parameters, but the crystal structure is stable and maintain a cubic perovskite phase.The leaching rate(7 d)of Sr in Ba_1-xSr_xZrO₃ is at the level of 10^-4 g·m^-2·d^-1, which is lower than that in the current main ceramic solidified bodies.

Keywords: waste treatment; Sr; lattice immobilization; perovskite-type

中图分类号：TL941                              文献标志码：A

文章编号：1008-5548(2022)03-0124-09

DOI:10.13732/j.issn.1008-5548.2022.03.015

收稿日期： 2021-12-16， 修回日期：2022-03-31，在线出版时间：2022-04-25。

基金项目：国家自然科学基金项目，编号：51502249；四川省科技厅应用基础研究项目，编号：2020YJ0419；环境友好能源材料国家重点实验室开放基金，编号：18kfhg04。

第一作者简介：刘海峰(1983—)，男，副教授，博士，研究方向为钙钛矿结构氧化物功能材料、核素晶格固化。E-mail：liuhaifeng@swust.edu.cn。

通信作者简介： 霍冀川(1962—)，男，教授，硕士，博士生导师，研究方向为核素晶格固化。E-mail：huojichuan@swust.edu.cn。