高温He-H2气氛下新型富锂Li4+xSi1-xAlxO4微球锂损失行为及调控

为了获得锂含量高且锂损失小的先进锂基微球，针对锂基微球在高温He-H2环境中存在锂损失且调控困难的问题，本项目提出氧缺陷调控Li4+xSi1-xAlxO4锂损失行为的新方法。项目拟通过高温球床损失实验结合理论计算，揭示Li4+xSi1-xAlxO4在高温He-H2环境中氧的形成机理，并探明氧缺陷对锂损失路径的影响规律。在此基础上，设计氧缺陷并通过离子注入和调控氧分压获得具有不同氧缺陷浓度的Li4+iS1-iAliO4-y，研究氧缺陷对锂损行为的影响规律，揭示氧缺陷调控锂损失的机制，形成调控锂损失行为的新方法，为新型富锂增殖微球的设计提供基础理论和实验数据的支撑，推动新型增殖微球的发展。

To obtain a new-type advanced tritium breeder with high lithium content and low lithium loss, aiming at solving the problem of lithium loss and the difficulty of regulation at high temperature under He-H2, this project presents a novel process to regulate the lithium loss behavior of the new lithium-rich Li4+xSi1-xAlxO4 breeders by adjusting its oxygen vacancy. The lithium loss experiments at high temperature under He-H2 combined with the First-principles calculation are conducted to reveal the oxygen formation mechanism and the effect of oxygen defects on the lithium loss path in Li4+xSi1-xAlxO4 breeders. Then the Li4+iSi1-iAliO4-y breeders with oxygen defects will be designed based on the theoretical calculation and obtained by ion implantation and adjusting the oxygen partial pressure. The influence rule of oxygen defects on the lithium loss behavior of the Li4+iSi1-iAliO4-y pebbles are investigated to reveal the regulation mechanism. The novel method for regulating the lithium loss of breeders will provide scientific support for designing the new-type advanced tritium breeders and promote the development of the new-advanced tritium breeders.