Abstract
Aluminum nitride (AlN) composites powders with hydrolysis resistance were successfully fabricated by chemically grafting titanate coupling agents (KR-238S) and poly (N-vinyl pyrrolidone-co-itaconic acid) (NVP-IA). The results from TEM/EDS, FT-IR, XPS, pH measurements, XRD, SEM/EDS, Zeta potential and TG indicated that the surface of AlN particle were victoriously coated using a dip-coating method. The TEM results showed that a wrapping layer approximately 10–20 nm thick was formed on the surface of the AlN powders, shaping up as a core–shell structure to isolate contact with water molecules. Measuring the pH value of AlN powders in deionized water at 25 °C is to investigate the hydrolytic behavior. The Al(OH)3 was formed within 12 h of the original AlN powders being hydrolyzed, whereas the modified AlN particles maintained their morphology and crystal structure for 276 h to against hydrolysis. In particular, the zeta potential analysis demonstrates that M-AlN has stronger absolute zeta values due to the hydrophilicity of vinylpyrrolidone. The results obtained from the thermal gravimetric analysis also revealed that NVP-IA vaporizes at high temperatures. Therefore, this study provides a novel NVP-IA/AlN composites produced via using a simple cladding modification method, and find a new way to improve the hydrolysis resistance of AlN powders.
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Acknowledgements
This work was supported by the Shanghai Municipal Natural Science Foundation, China (Granted no. 19ZR1418500) and National Natural Science Foundation of China (Granted no. 51172139).
Funding
This work was supported by the (Shanghai Municipal Natural Science Foundation, China) [Granted numbers (19ZR1418500)] and (National Natural Science Foundation of China) [Granted numbers (51172139)].
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Wang, S., Wang, Y., Xie, J. et al. Composite NVP-IA/AlN powders with core–shell structure for anti-hydrolysis. Appl. Phys. A 128, 603 (2022). https://doi.org/10.1007/s00339-022-05730-7
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DOI: https://doi.org/10.1007/s00339-022-05730-7