Wen Qian, Wang Peng, Zheng Jingwu, Ying Yao, Yu Jing, Li Wangchang, Che Shenglei, Qiao Liang
College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Research Center of Magnetic and Electronic Materials, Zhejiang University of Technology, Hangzhou 310014, China.
Materials (Basel). 2021 Mar 12;14(6):1386. doi: 10.3390/ma14061386.
Polyvinyl butyral (PVB) was used in the Al(OH)/carbon black/ethanol slurries by the three-roll mixing to prepare AlN powder using the carbothermal reduction-nitridation (CRN) process in the experiments. The effects of PVB addition on the synthesis of AlN powder were studied by viscosity, tap density, XRD, SEM and TG measurements. The results showed that the PVB layer covering on the surface of Al(OH) particles reduced the viscosity of Al(OH)/carbon/ethanol slurry and increased the dispersion homogeneity of Al(OH)/carbon raw powder. The tap densities of the Al(OH)/carbon mixtures after three-roll milling could be increased with the increase in PVB addition. In the CRN process, most of the PVB covering Al(OH) particles evaporated and supplied the passage for nitrogen removal to the particles. Based on the experimental data, the role of PVB on the mixing and CRN process was discussed.
在实验中，通过三辊混合将聚乙烯醇缩丁醛（PVB）用于氢氧化铝/炭黑/乙醇浆料中，采用碳热还原氮化（CRN）工艺制备AlN粉末。通过粘度、振实密度、XRD、SEM和TG测量研究了添加PVB对AlN粉末合成的影响。结果表明，覆盖在氢氧化铝颗粒表面的PVB层降低了氢氧化铝/炭/乙醇浆料的粘度，提高了氢氧化铝/炭原料粉末的分散均匀性。三辊研磨后，氢氧化铝/炭混合物的振实密度会随着PVB添加量的增加而提高。在CRN工艺中，覆盖氢氧化铝颗粒的大部分PVB蒸发，并为颗粒提供了脱氮通道。基于实验数据，讨论了PVB在混合和CRN工艺中的作用。
