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Meeting Materials Science & Technology 2020
Symposium Thermodynamics of Materials in Extreme Environments
Presentation Title Thermodynamics and Elastic Properties of Cerium Doped Yttrium Aluminum Garnets
Author(s) Vitaliy G. Goncharov, Nian Wei, Miu Lun Lau, Albert Migliori, Hongwu Xu, Min Long, Xiaofeng Guo
On-Site Speaker (Planned) Vitaliy G. Goncharov
Abstract Scope Cerium doped yttrium aluminum garnet (Y3-xCexAl5O12, Ce:YAG) is a promising yellow-light emitting component of solid state white-light emitting diode. In this work, we investigate the effects of Ce doping on the elastic properties of Ce:YAG. Resonant ultrasound spectroscopy (RUS) was employed to determine the elastic constants of Ce:YAG at x = 0.025, 0.1 and 1 at. %. Through the calculation of elastic moduli and utilization of the Mie-Grüneisen EOS approach Cp at room temperature was successfully obtained for Ce:YAG. Debye Temperature (𝜃𝐷) was determined with RUS measured sound velocities and was in excellent agreement to values obtained from neutron scattering and theoretical methods. Lastly, RUS application and reliability towards extrapolation of further thermodynamic parameters is discussed.


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Thermodynamics and Elastic Properties of Cerium Doped Yttrium Aluminum Garnets

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