Effect of rare earth ions doping on the thermal properties of YAG transparent ceramics |
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| Affiliation: | 1. CNR ISTEC, Institute of Science and Technology for Ceramics, Via Granarolo 64, Faenza, 48018, Italy;2. Department of Glass and Ceramics, University of Chemistry and Technology, Prague, Technická 5, Prague 6, 166 28, Czech Republic;1. The Key Laboratory of Photonic Devices and Materials, Anhui Province, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. CEMDRX, Physics Department, Universidade de Coimbra, Coimbra P-3004-516, Portugal;1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore;3. School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore;4. College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China;1. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;2. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA;3. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, PR China |
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| Abstract: | Yttrium aluminium garnet doped with rare earth ions is one of the most common active media in solid state lasers. In high-power lasers, thermal management is crucial, requiring information on the thermal properties. In this work, the thermal diffusivity and conductivity of polycrystalline YAG ceramics doped with Yb and Er were measured by laser flash method at various temperatures ranging from room temperature to 900 °C. Transparent ceramic YAG samples were prepared by solid state reactive sintering of oxide powders under vacuum. Thermal diffusivity and conductivity showed similar trends, decreasing with increasing temperature as well as with the increase of dopant content from 0 to 20 at.%. The measured values were compared with literature data and empirical relations. Similar values were obtained both for Yb and Er doping. We thus suggest that the data of thermal diffusivity and conductivity of Yb:YAG may be used as a first approximation for Er:YAG. |
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| Keywords: | YAG Thermal conductivity Thermal diffusivity Rare earth ions Transparent ceramics |
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