Selection of materials for fusion reactors and, in particular, for blanket systems is one of the most important tasks that determine the development of fusion energy. Lithium ceramics LiTiO is considered as prospective candidate for solid breeders of future fusion reactors' blankets. The paper presents the results of high-temperature tests of LiTiO + 5 mol% TiO ceramics, performed under conditions of blowing with argon containing impurities of water vapor of different isotopic compositions (HO, HDO, DO) in the range of temperature from 100 °C to 1400 °C. The vapor–gas mixture for the experiment was prepared in a special mixing tank. The interaction of LiTiO + 5 mol% TiO ceramics with chemically active gases and water vapors was investigated by thermogravimetry (TG), differential scanning calorimetry (DSC) and mass spectrometry (MS) methods. As a result of experiment, the dependences of the sample mass change during heating under single purge gas composition was obtained. Mass spectra that characterize the changes in the qualitative composition of the gas mixture in the reaction chamber with the investigated sample were recorded and subsequently analyzed. An isotope effect is observed during the experiment: the release of D2 gas begins significantly earlier than the release of HD gas. The observed effect appears only in the high-temperature region (above 1050 °C), which characterizes the investigated material as almost completely chemically neutral towards water vapor.

中文翻译：

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水蒸气与锂陶瓷Li2TiO3的高温相互作用

聚变反应堆，特别是包层系统材料的选择是决定聚变能发展的最重要任务之一。锂陶瓷 LiTiO 被认为是未来聚变反应堆包层固体增殖剂的潜在候选者。本文介绍了 LiTiO + 5 mol% TiO 陶瓷的高温试验结果，在 100° 温度范围内用含有不同同位素组成（H2O、HDO、DO）的水蒸气杂质的氩气吹入的条件下进行C至1400°C。实验用的蒸气-气体混合物是在特殊的混合罐中制备的。通过热重分析（TG）、差示扫描量热分析（DSC）和质谱分析（MS）方法研究了LiTiO + 5 mol% TiO陶瓷与化学活性气体和水蒸气的相互作用。作为实验的结果，获得了在单一吹扫气体组成下加热期间样品质量变化的依赖性。记录并随后分析表征反应室中气体混合物与所研究样品的定性组成变化的质谱。实验过程中观察到同位素效应：D2 气体的释放开始明显早于 HD 气体的释放。观察到的效应仅出现在高温区域（高于 1050 °C），这表明所研究的材料对水蒸气几乎完全化学中性。