连续激光辐照下的TiO<sub>2</sub>薄膜热传导性质

李代林; 杨丹; 崔纪琨; 王宁; 朱化凤

doi:10.3788/CO.20191203.0628

Volume 12 Issue 3

Jun. 2019

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Chinese Optics > 2019 > 12(3): 628-637.

LI Dai-lin, YANG Dan, CUI Ji-kun, WANG Ning, ZHU Hua-feng. Heat conduction properties of TiO2 films irradiated by a continuous laser[J]. Chinese Optics, 2019, 12(3): 628-637. doi: 10.3788/CO.20191203.0628

Citation:

LI Dai-lin, YANG Dan, CUI Ji-kun, WANG Ning, ZHU Hua-feng. Heat conduction properties of TiO₂ films irradiated by a continuous laser[J]. Chinese Optics, 2019, 12(3): 628-637. doi: 10.3788/CO.20191203.0628

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Heat conduction properties of TiO₂ films irradiated by a continuous laser

doi: 10.3788/CO.20191203.0628

College of Science, China University of Petroleum(East China), Qingdao 266580, China

Funds:

Major Program of the National Natural Science Foundation of China 61890964

National Key Research and Development Program Project 2017YFC1404000

National Science and Technology Major Project 2017ZX05019-006

Key Research and Development Project of Shandong Province GG201809250065

Fundamental Research Funds for the Central Universities 19CX05003A-10

Fundamental Research Funds for the Central Universities 18CX02046A

More Information

Corresponding author: LI Dai-lin, E-mail:qd_ldl@upc.edu.cn
Received Date: 10 Aug 2018
Rev Recd Date: 12 Oct 2018
Publish Date: 01 Jun 2019

Abstract

Abstract

The laws of heat conduction play an important role in the application of laser-induced film material modification. In this paper, the thermal effects of titanium dioxide(TiO₂) film surfaces irradiated by a carbon dioxide laser was studied theoretically and experimentally. Firstly, a three-dimensional model of titanium dioxide thin film with a rough surface was constructed using a finite element method and their three-dimensional temperature distribution were calculated. Then, the TiO₂ thin films were irradiated by a CO₂ laser and the effects of irradiation time, power on the morphology, crystal phases and color were analyzed. Simulation results show that the transient temperature field of titanium dioxide irradiated by a CW laser is a Gaussian distribution, which is related to laser power, spot radius, irradiation time and other factors. When the surface temperature is less than the decomposition temperature, the maximum average surface temperature of the film meets the linear relationship with the laser power, and the ExpAssoc nonlinear relationship is satisfied with laser spot radius. Experimental results show that because of laser irradiation, the roughness of TiO₂ thin film decreased and the color of the film changed. Small laser power or short irradiation time leads to small and uneven effective area, on the contrary thermal deformation will occur. Combined with the simulation and experiment results, it is found that the best treatment effect can be obtained when irradiating TiO₂ thin film 10 seconds with a laser with a power of 6 W and a radius of 3 mm.
- continuous laser,
- titanium dioxide film,
- heat transfer rule

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References(15)

References

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