摘要
本文利用原位加热电镜技术和高分辨透射电镜研究了WO_(3)-BiVO_(4)非晶复合薄膜原位退火相变过程。退火过程中,薄膜中的Bi元素逐渐挥发,由于电镜中的高真空缺氧环境,加热到600℃时,形成的结晶相大部分为立方W相,少量的WO_(x)(0<x≤3)、VO_(x)(0<x≤25)和BixVOy(0<x≤1,0<y≤4)氧化物晶相,完全不同于利用脉冲激光沉积方法在充足氧气气氛和600℃条件下生长退火后形成的WO_(3)纳米柱嵌入BiVO_(4)基质中的垂直异质外延结晶复合薄膜。因此,退火气氛和样品的受热方式对薄膜的结晶相变过程有很大影响。
The phase transition of WO_(3)-BiVO_(4)amorphous composite film was investigated by in-situ heating electron microscopy.During the annealing process,Bi elements were easily evaporated.The main crystalline phase was a cubic W phase with a small amount of orthorhombic WO_(x),orthorhombic VO_(x) and tetragonal BixVOy phases when the film was heated to 600℃.This is different from the vertical heteroepitaxial crystalline composite film with WO_(3)nanopillars embedded in the BiVO_(4)matrix grown in the sufficient oxygen at 600℃by pulsed laser deposition.Thus,the atmosphere during the annealing process and the heating mode greatly influence the crystallization process of the composite film.
作者
宋海利
黄荣
SONG Hai-li;HUANG Rong(Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,School of Chemistry,Sun Yat-sen University,Guangzhou Guangdong 510006;Key Laboratory of Polar Materials and Devices(MOE)and Department of Electronics,East China Normal University,Shanghai 200062,China)
出处
《电子显微学报》
CAS
CSCD
北大核心
2023年第3期283-290,共8页
Journal of Chinese Electron Microscopy Society
基金
广东省基础与应用基础研究基金(No.2020A1515110178)
中山大学本科教学质量工程项目.
