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Synthesis of ZrB2 nanoparticles by sol-gel method

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Abstract

Zirconium diboride (ZrB2) nanoparticles were synthesized by sol-gel method using zirconium n-propoxide (Zr(OPr)4), boric acid (H3BO3), and sucrose (C12H22O11). Additionally, acetylacetone (acac) was used as chemical modifier in a neutral condition to stabilize Zr(OPr)4 which hydrolyzes easily. Here, C12H22O11 was used since it can be completely decomposed to carbon. Thus, carbon might be accounted precisely for the carbothermal reduction reaction. A single phase ZrB2 without residual ZrO2 was obtained with a molar ratio of B/Zr = 2.3 for the starting materials at 1,550 °C and the average grain size of ZrB2 nanoparticles was ca. 50 nm. The photomicrograph revealed a spherical round shape morphology of the ZrB2 nanoparticles with an uniform size distribution. On the other hand, in the case of either B/Zr (mol.) = 2.0 or pyrolyzing temperature below 1,550 °C for B/Zr (mol.) = 2.3, there existed both m-ZrO2 and t-ZrO2 phases besides ZrB2.

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Acknowledgments

The authors appreciate the financial support from the National Science Foundation of China (NSFC50974007); the Scientific Research Starting Foundation for Returned Overseas Chinese Scholars, Ministry of Education; the Start-Up Fund for High-End Returned Overseas Talents, Ministry of Human Resources and Social Security, China and the Lab-Installation Foundation of Beihang University for New Teachers.

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Authors and Affiliations

  1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, 100191, Beijing, China

    Ruixing Li, Yun Zhang & Haijie Lou

  2. Aerospace Research Institute of Materials and Processing Technology, No. 1 Nan Da Hong Men Road, Fengtai District, 100076, Beijing, China

    Junping Li & Zhihai Feng

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  1. Ruixing Li
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  2. Yun Zhang
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  3. Haijie Lou
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Correspondence to Ruixing Li.

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Li, R., Zhang, Y., Lou, H. et al. Synthesis of ZrB2 nanoparticles by sol-gel method. J Sol-Gel Sci Technol 58, 580–585 (2011). https://doi.org/10.1007/s10971-011-2430-y

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  • DOI: https://doi.org/10.1007/s10971-011-2430-y

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