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Co nanoparticle effects on the thermoluminescent signal induced by UV and gamma radiation in ZrO_2 powders

机译:钴纳米粒子对ZrO_2粉末中UV和γ辐射诱导的热致发光信号的影响

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摘要

Zirconia powders, both pure and doped with Co nanoparticles were prepared by the sol-gel method followed by thermal treatment at 1000 ℃. The morphological and crystallographic characteristics were studied by scanning and transmission electron microscopy, X-ray diffraction and the Rietveld refinements method. Analysis of the thermoluminescent (TL) signal induced by UV and gamma radiation was also conducted. According to the results, Co nanoparticles have a strong influence on the growth of ZrO_2 particles and favor the formation of monoclinic zirconia. Moreover, an important influence of the added Co nanoparticles was observed on the position of the TL peaks of ZrO_2, inducing a shift in the luminescence towards higher temperatures as well as the presence of more TL peaks at higher temperatures.
机译:通过溶胶-凝胶法制备纯净的并掺有Co纳米粒子的氧化锆粉末,然后在1000℃下进行热处理。通过扫描和透射电子显微镜,X射线衍射和Rietveld精制方法研究了形态和晶体学特征。还分析了由紫外线和伽马辐射引起的热致发光(TL)信号。根据结果​​,Co纳米颗粒对ZrO_2颗粒的生长具有强烈的影响,并有利于单斜晶氧化锆的形成。此外,观察到添加的Co纳米颗粒对ZrO_2的TL峰的位置的重要影响,导致发光向更高温度的偏移以及在更高温度下存在更多的TL峰。

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