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Effect of heat treatment on crystallization of Nd:YAG ceramics

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Abstract

(Nd0.01Y0.99)3Al5O12 nano-sized powders were synthesized by low temperature combustion (LCS), using Nd2O3, Y2O3, Al(NO3)3·9H2O, ammonia water and citric acid as starting materials. The powders were characterized by TG-DTA, XRD, FT-IR, ICP and TEM, respectively. The grain sizes were calculated by the Scherrer’s formula using the full width at half maximum (FWHM) of YAG (420) crystal plane diffraction lines. The study focused on crystallization of ceramics at different heat treatment temperatures. The experimental results show that crystallizing temperature of YAG is 850 °C, and the intermediate crystal phase YAP, appearing during heat treatment, transforms to YAG cubic crystal phase at the temperature of 1 050 °C. The particle size of the powders synthesized by LCS is nano-sized. With the temperature increasing, the mean grain sizes raise, the stand deviations keep almost at the value of 2.0 and the lattice parameters decrease. The grains mainly grow by grain boundary diffusion. The lattice parameter expansion is caused by an increase of the repulsive dipolar interactions on surfaces of crystallites.

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Authors and Affiliations

  1. School of Materials and Chemical Engineering, Changchun University of Science and Technology, Changchun, 130022, China

    Zhang Huashan Ph D  (张华山), Su Chunhui Ph D  (苏春辉) & Zhang Hongbo

  2. The First Research Laboratory, China North Vehicle Research Institute, Beijing, 100072, China

    Hui Han

Authors
  1. Zhang Huashan Ph D  (张华山)
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  2. Hui Han
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  3. Su Chunhui Ph D  (苏春辉)
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  4. Zhang Hongbo
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Correspondence to Su Chunhui Ph D  (苏春辉).

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Funded by the Chinese Education Ministry Excellent Teacher Foundation (KB20026)

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Zhang, H., Hui, H., Su, C. et al. Effect of heat treatment on crystallization of Nd:YAG ceramics. J. Wuhan Univ. Technol. 22, 333–336 (2007). https://doi.org/10.1007/s11595-005-2333-2

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  • DOI: https://doi.org/10.1007/s11595-005-2333-2

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