Thermal expansion coefficient determination of pure, doped, and co-doped anatase nanoparticles heated in sealed quartz capillaries using in-situ high-temperature synchrotron radiation diffraction
Thermal expansion coefficient determination of pure, doped, and co-doped anatase nanoparticles heated in sealed quartz capillaries using in-situ high-temperature synchrotron radiation diffraction
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DOI：
10.1016/j.heliyon.2020.e04501
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发表时间：
2020-07-01
期刊：
影响因子：
4
通讯作者：
Albetran, Hani Manssor
中科院分区：
文献类型：
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作者：
Albetran, Hani Manssor
同步辐射衍射进行原位和在高温下，以建立纯/未掺杂，掺杂和共掺杂的nanoparticles纳米粒子的晶格参数。纳米颗粒在密封的石英毛细管中从室温加热到950摄氏度。建立了压力、掺杂（铝或铟）和共掺杂（铟铬或银铬）对纳米晶陶瓷热膨胀系数的影响。同步辐射衍射在高温和原位，透射电子显微镜，和Rietveld精修方法被用来粉碎的纳米粒子。加压的纳米颗粒的热膨胀各向异性，α（a）/α（c），小于在未加压的空气或氩气中加热的纳米颗粒的热膨胀各向异性，并且在真空中小得多。
Synchrotron radiation diffraction was conducted in-situ and at high temperature to establish the lattice parameters of pure/undoped, doped, and co-doped anatase nanoparticles. The nanoparticles were heated from room temperature to 950 degrees C in sealed quartz capillaries. The effect of pressure, doping (aluminium or indium), and co doping (indium-chromium or silver-chromium) on the thermal expansion coefficients of nanocrystalline anatase was established. Synchrotron radiation diffraction at high temperature and in-situ, transmission electron microscopy, and the Rietveld refinement method were used to characterise the anatase nanoparticles. The anisotropy of the thermal expansion, alpha(a)/alpha(c), for pressurised anatase nanoparticles was smaller than that for anatase heated in unpressurised air or argon, and it was much smaller in a vacuum.