Thermal and Optical Characterization of Undoped and Neodymium-Doped Y3ScAl4O12 Ceramics

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• 作者：Maria Cinta Pujol ; Alexandre Maitre ; Julie Carreaud ; R茅my Boulesteix ; Alain Brenier ; Guillaume Alombert-Goget ; Yannick Guyot ; Joan Josep Carvajal ; Rosa Maria Sol茅 ; Jaume Massons ; Alberto Oleaga ; Agust铆n Salazar ; Isabel Gallardo ; Pablo Moreno ; Javier Rodr铆guez V谩zquez de Aldana ; Magdalena Aguil贸 ; Francesc Diaz
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：June 26, 2014
• 年：2014
• 卷：118
• 期：25
• 页码：13781-13789
• 全文大小：409K
• ISSN：1932-7455

文摘

Y_3鈥?xNd_3xSc₁Al₄O₁₂ (x = 0, 0.01, and 0.02) ceramics were fabricated by sintering at high temperature under vacuum. Unit cell parameter refinement and chemical analysis have been performed. The morphological characterization shows micrograins with no visible defects. The thermal analysis of these ceramics is presented, by measuring the specific heat in the temperature range from 300 to 500 K. Their values at room temperature are in the range 0.81鈥?.90 J g^{1鈥?/sup>K鈥?. The thermal conductivity has been determined by two methods: by the experimental measurement of the thermal diffusivity by the photopyroelectric method, and by spectroscopy, evaluating the thermal load. The thermal conductivities are in the range 9.7鈥?.5 W K鈥? m鈥? in the temperature interval from 300 to 500 K. The thermooptic coefficients were measured at 632 nm by the dark mode method using a prism coupler, and the obtained values are in the range 12.8鈥?3.3 脳 10鈥? K鈥?. The nonlinear refractive index values at 795 nm have been evaluated to calibrate the nonlinear optical response of these materials.}