摘要
Abstract
The safe disposition of high level radioactive waste is a global problem for the nuclear development,since the technical is very difficult,the research cycle is longer,and it refers to different subjects including geology,chemistry,materials,and others.As the first artificial barrier of deep geological disposal of HLW,the stability of immobilization has important influence on disposal repository.This paper synthesizes zircon by sol-gel.We dicuss sol-gel reaction conditions how to influence the preparation of precursor.Testing the physical and chemical properties of zircon samples and use XRD,EPMA to analysise the different phase composition and mineral composition of several groups of zircon samples.The experimental conditions for zircon precursor is:amount of water 30 mL,pH 2～3.The phase of sample washed by ammonia is form of baddcleyite(ZrO2) and zircon(ZrSiO4),the other phase(SiO2).Another without washing only includes baddeleyite (ZrO2).The main compositions of two samples are mainly composed with ZrO2 and SiO2,and ZrO2 is the main content.关键词
高放射性废物/溶胶-凝胶法/锆英石/烧结收缩率/晶体组成/晶体结构Key words
High level radioactive waste/Sol-gel method/zircon/Sintering shrinkage/Crystal structure/Crystal structure分类
化学化工
