Two-dimensional imaging of gas-to-particle transition in flames by laser-induced nanoplasmas

Journal Article · Mon Jan 13 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4861904· OSTI ID:22275763

Zhang, Yiyang ^[1]; Li, Shuiqing; Ren, Yihua; Yao, Qiang ^[1]; Law, Chung K. ^[2]

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1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084 (China)
2. Center for Combustion Energy, Tsinghua University, Beijing 100084 (China)

Two-dimensional imaging of gas/particle phase transition of metal oxides in their native high-temperature flow conditions, using laser-driven localized nanoplasmas, was obtained by utilizing the gap between the excitation energies of the gas and particle phases such that only the Ti atoms in the particle phase were selectively excited without detectable Bremsstrahlung background. These in situ images of the particle phase Ti distribution allow the quantitative visualization of the transition of the gas precursors to the nanoparticle phase across the flame sheet as well as diffusion of the particle concentration in the post-flame zone.

• OSTI ID: 22275763
• Journal Information: Applied Physics Letters, Vol. 104, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EXCITATION
FLAMES
IMAGES
LASERS
METALS
OXIDES
PARTICLES
PHASE TRANSFORMATIONS