Effect of NiS addition on nitridation of alumina to aluminum nitride using polymeric carbon nitride as a nitridation reagent |
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| Affiliation: | 1. Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University, Zhongguancun Street, Haidian District, Beijing 100084, China;2. State Key Lab of New Ceramic and Fine Processing, Tsinghua University, Beijing 100084, China;1. School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China;1. Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi''an, 710062, Shaanxi, PR China;2. Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi''an, 710062, Shaanxi, PR China;1. College of Electrical and Information Engineering, Hunan University, 2 Lushan South Road, Changsha, 410082, Hunan, China;2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University, 28 Xianning West Road, Xi`an, 710049, Shaanxi, China |
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| Abstract: | We investigated the effect of adding nickel(II) sulfide (NiS) on nitridation of alumina (Al2O3) to aluminum nitride (AlN) using polymeric carbon nitride (PCN), which was synthesized by polymerization of dicyandiamide at 500 °C. The product powders obtained from nitridation of a mixture of δ-Al2O3 and NiS powders (mole ratio of 1:0.01) at various reaction temperatures were characterized by powder X-ray diffraction, 27Al magic-angle spinning nuclear magnetic resonance, and Raman spectroscopy. δ-Al2O3 began to convert to AlN at 900 °C and completely converted to AlN at 1300 °C. The as-synthesized sample powders contained nitrogen-doped carbon microtubes (N-doped CMTs) with a length of several tens of mm and thickness of ca. 3 µm. The addition of NiS to δ-Al2O3 resulted in the enhancement of the amount of N-doped CMTs and nitridation rate, which might be due to the catalytic action of Ni particles on the thermal decomposition of vaporized PCN. The change in Raman spectra with reaction temperatures indicated that the crystallinity of N-doped CMTs was increased by calcining at higher reaction temperatures. |
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| Keywords: | D. Nitrides Aluminum nitride Alumina Carbon nitride NiS N-doped carbon microtubes |
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