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Fe-Doped Sol-Gel Glasses and Glass-Ceramics for Magnetic Hyperthermia

机译：掺铁的溶胶凝胶玻璃和用于高温热疗的玻璃陶瓷

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This work deals with the synthesis and characterization of novel Fe-containing sol-gel materials obtained by modifying the composition of a binary SiO 2 -CaO parent glass with the addition of Fe 2 O 3 . The effect of different processing conditions (calcination in air vs. argon flowing) on the formation of magnetic crystalline phases was investigated. The produced materials were analyzed from thermal (hot-stage microscopy, differential thermal analysis, and differential thermal calorimetry) and microstructural (X-ray diffraction) viewpoints to assess both the behavior upon heating and the development of crystalline phases. N 2 adsorption–desorption measurements allowed determining that these materials have high surface area (40–120 m 2 /g) and mesoporous texture with mesopore size in the range of 18 to 30 nm. It was assessed that the magnetic properties can actually be tailored by controlling the Fe content and the environmental conditions (oxidant vs. inert atmosphere) during calcination. The glasses and glass-ceramics developed in this work show promise for applications in bone tissue healing which require the use of biocompatible magnetic implants able to elicit therapeutic actions, such as hyperthermia for bone cancer treatment.
机译：该工作涉及通过添加Fe 2 O 3来改变二元SiO 2 -CaO母体玻璃的组成而获得的新型含铁溶胶-凝胶材料的合成和表征。研究了不同处理条件（空气中煅烧与氩气流动）对磁晶相形成的影响。从热学（热台显微镜，差热分析和差示热量热法）和微结构（X射线衍射）的角度对生产的材料进行了分析，以评估加热时的行为和结晶相的发展。 N 2吸附-解吸测量可以确定这些材料具有较高的表面积（40–120 m 2 / g）和中孔结构，中孔尺寸在18至30 nm之间。据评估，实际上可以通过控制煅烧过程中的铁含量和环境条件（氧化剂与惰性气氛）来调整磁性。在这项工作中开发的眼镜和玻璃陶瓷显示出有望在骨组织愈合中的应用，这些应用需要使用能够引起治疗作用的生物相容性磁性植入物，例如用于骨癌治疗的高温疗法。

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