电铸过程中由TiO2金红石到锐钛矿的相变

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-06-04 DOI:10.1016/j.jeurceramsoc.2025.117597

Andrea Alessio , Valentina Bonino , Federico Picollo , Lorenzo Mino , Matteo Fretto , Jorge Serrano , Vanessa Hinojosa-Chasiquiza , Kalle Goß , Regina Dittmann , Gema Martinez-Criado , Marco Truccato

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引用次数: 0

摘要

研究了x射线纳米束辐照的影响，以及在金红石单晶上制作的类忆阻器件的金属电极之间的后续放电。光子通量约为6 × 1012光子/秒的x射线照射在74 × 60 nm2的面积上，照射时间为每点数十秒，已经能够在电极之间形成导电路径，从而指导放电过程。亚微米空间分辨率的Ti K-edge XANES成像结果显示，前边缘峰的结构变化很小，表明影响区域存在锐钛矿相，微拉曼成像也证实了这一点。这意味着在放电过程中会发生非常强烈的焦耳加热（T >； 2140 K），然后是非常快速的冷却过程。这种金红石到锐钛矿的转化代表了一种新的电方法，可以从金红石单晶中形成局部锐钛矿纳米颗粒，这可能有助于特定的应用。

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Guided phase transition from TiO2 rutile to anatase during electroforming of memristor-like devices

The effect of X-ray nano-beam irradiation has been investigated, along with a subsequent electric discharge between the metallic electrodes of memristive-like devices fabricated on top of rutile single crystals. X-ray irradiation with a photon flux of about 6 × 10¹² photons/second impinging on an area of 74 × 60 nm², and with irradiation times of the order of tens of seconds per point, has been able to pattern a conducting path between the electrodes, which has guided the electric discharge process. The results from Ti K-edge XANES mapping with submicron spatial resolution show small changes in the configuration of the pre-edge peaks, suggesting the presence of anatase phase in the affected region, which is also confirmed by micro-Raman mapping. This implies the occurrence of very intense Joule heating during the electric discharge (T > 2140 K), followed by a very quick cooling process. This conversion of rutile to anatase represents a novel electrical method for the formation of localized anatase nanoparticles from rutile single crystals, which may be of help for specific applications.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.