Abstract The paper studies an original way to obtain mineral-like ceramics matrices suitable for solid immobilization of a high-energy 90Sr isotope, which are safe configurations of the active zones of ionizing irradiation sources. Spark plasma sintering-reactive synthesis (SPS-RS) has been implemented for the first time to fabricate SrWO4 ceramics via “in situ” interaction of the SrO and WO3 mixture in vacuum media under uniaxial pressing. XRD, SEM, and EDX were used to identify phase composition, elemental contents and structure of the obtained ceramics. Dynamics of the oxide mixture densification were studied under the conditions of spark plasma heating in the range of 900–1200 °C with the physico-mechanical properties of the final consolidated SrWO4 matrices being determined. Presented approach provides rapid (minute-long) synthesis of dense matrices exhibiting low desalination rate of strontium (10−5–10−6 g/cm2·day) and satisfying the required standards.

中文翻译：

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用于 90Sr 固定的 SrWO4 陶瓷基体的火花等离子体烧结反应合成

摘要 本文研究了一种获得适合高能90Sr同位素固体固定的类矿物陶瓷基体的原始方法，该基体是电离辐射源活性区的安全配置。首次实施火花等离子体烧结反应合成（SPS-RS），通过单轴加压下 SrO 和 WO3 混合物在真空介质中的“原位”相互作用来制造 SrWO4 陶瓷。XRD、SEM和EDX用于鉴定所得陶瓷的相组成、元素含量和结构。在 900-1200 °C 范围内的放电等离子体加热条件下研究了氧化物混合物致密化的动力学，并确定了最终固结的 SrWO4 基质的物理机械性能。