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Journal of Sol-Gel Science and Technology

Erschienen in:

12.03.2020 | Original Paper: Sol-gel and hybrid materials for energy, environment and building applications

Preparation and microstructure characterization of crack-free zirconium nitride microspheres by internal gelation combined with two-step nitridation

verfasst von: Shijiao Zhao, Rui Xu, Jingtao Ma, Xuping Lin, Xing Cheng, Xingyu Zhao, Shaochang Hao, Changsheng Deng

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 2/2020

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Abstract

Zirconium nitride microspheres with uniform size of ~680 μm, good sphericity, and good integrity were prepared by internal gelation process and two-step nitridation. The effects of carbon black and temperature on stability of sol were investigated. Induction of carbon black decreased stability of sol but the amount of carbon black added has little effect on the sol stability. Increasing temperature linearly decreased the stable time of the sol. Sol with stable time of up to 1 h, which was adequate for casting of liquid spheres was achieved at 11.0 °C, a significant increase from conventional 4.0 °C. Two-step nitridation was developed to prepare crack-free ceramic microspheres with high relative nitride phase content. The special microstructure on surface and cross section of microspheres reveals stepped-growth of nitride crystals.

Vorheriger Artikel Effects of Mn–Zr substitution on the magnetic properties of Ba-ferrites fabricated by sol–gel auto-combustion

Nächster Artikel Synthesis of magnetically separable Bi2O2CO3/carbon nanotube/ZnFe2O4 as Z-scheme heterojunction with enhanced photocatalytic activity for water purification

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Titel: Preparation and microstructure characterization of crack-free zirconium nitride microspheres by internal gelation combined with two-step nitridation
verfasst von: Shijiao Zhao
Rui Xu
Jingtao Ma
Xuping Lin
Xing Cheng
Xingyu Zhao
Shaochang Hao
Changsheng Deng
Publikationsdatum: 12.03.2020
Verlag: Springer US
Erschienen in: Journal of Sol-Gel Science and Technology / Ausgabe 2/2020
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-020-05276-1

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